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Crown of thorns
Crown of thorns
Crown of thorns
Crown of thorns
Crown of thorns
Euphorbia milii
Also known as : Christ thorn
The Euphorbia milii is commonly known as the crown of thorns or Christ thorn, as it is believed to the plant associated with the crown of thorns that was worn by Christ. It needs to stay above 10 ℃ with full sun.
Water
Water
Every 3 weeks
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Sunlight
Sunlight
Full sun
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Toxic to Humans
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care guide

Care Guide for Crown of thorns

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Watering Care
Watering Care
Water Crown of thorns lightly about once weekly to keep the roots hydrated. Let the soil surface dry out in between waterings. Try to keep water off of the leaves to avoid mildew and other diseases. Like many succulents, this plant is sensitive to over-watering. Little water is needed during winter when Crown of thorns is dormant.
Details on Watering Care Watering Care
Fertilizing Care
Fertilizing Care
Crown of thorns doesn't need much fertilizer and can suffer from root burn if overfed. Provide a half-dose of balanced liquid fertilizer mixed into water about once a month in spring and summer only.
Details on Fertilizing Care Fertilizing Care
Pruning
Pruning
Deadhead (or remove) withered flowers after flowering.
Details on Pruning Pruning
Soil Care
Soil Care
Sand, Chalky, Loam, Acidic, Neutral, Alkaline
Details on Soil Care Soil Care
Repotting
Repotting
Needs excellent drainage in pots.
Details on Repotting Repotting
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Crown of thorns
Water
Water
Every 3 weeks
Sunlight
Sunlight
Full sun
Hardiness Zones
Hardiness Zones
9 to 11
Planting Time
Planting Time
Late spring, Summer, Fall
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Questions About Crown of thorns

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What should I do if I water my Crown of thorns too much or too little?
Underwatered Crown of thorns
Crown of thorns and other succulents can endure long periods without water, so it’s unusual to find one of these suffering from underwatering. But, if you somehow forgot about your plant and neglected to water it for a month or more, you’ll probably find your Crown of thorns looking thirsty or with some damage from lack of watering.
It is very easy to identify an underwatered Crown of thorns. Plant look lacklustre and wrinkled. Some may have dried up completely, turned brown and crispy, or dropped off the plant. And of course, the soil will be completely dried out.
If your Crown of thorns is thirsty and underwatered, give it plenty of water as soon as possible. Submerging the pot entirely in water for about 5-10 minutes is a good way to make sure the soil and plant are rehydrated properly. When you feel a sense of moisture on the surface of the soil with your finger, it means the watering is done properly.
Overwatered Crown of thorns
Overwatering is dangerous to Crown of thorns and can be fatal to your plant if you don’t remedy the situation. Too much moisture over time leads to root rot, which prevents the roots from being able to absorb nutrients and water from the soil. Root rot occurs when wet conditions allow fungi and bacteria to flourish in the soil and feed on roots. When you find that it's overwatered, you'd better change the growing conditions, place it somewhere with more air ventilation and adjust water frequency, for example.
The symptoms of overwatering are yellow, swollen, and translucent organs that may even burst open from being over-full with water. If the problem continues without being treated, plant might turn brown or black, and fall off the plant at the slightest touch. Be sure to check the soil to determine if overwatering is the culprit, as some other issues can cause similar symptoms.
It’s a bit difficult (but not impossible) to save an overwatered plant. The key is catching it early before a lot of damage has occurred. If the roots become rotten, it is likely to kill the entire plant. If you suspect you have overwatered your Crown of thorns, the first step is to remove it from its pot and check the roots and soil.
After removing the plant from its pot, gently remove wet soil from around the roots and then rinse them clean in room-temperature water. This helps with removing fungus that might be lurking in the soil and allows you to get a better sense of how healthy the roots are. If your plant has already developed root rot, you will see roots that are dark brown or black, soft, mushy, or slimy.
If the majority of the roots are already affected by root rot, it may not be possible to save the plant. In this case, it is best to remove any healthy stem and try to use these to propagate a new Crown of thorns. If, on the other hand, only a portion of the roots have succumbed to rot and other healthy roots still remain, there is a chance it can be saved.
Use a sterilized cutting tool to remove any unhealthy-looking roots. Once you're left with only the firm, pale roots, it’s a good idea to dip them in a fungicide to kill off any remaining spores. After that you can repot your Crown of thorns in fresh, free-draining potting soil. While this does not always work to save a succulent with root rot, in most cases this plant will be able to make a full recovery and will put out new growth starting in the next growing season.
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How often should I water my Crown of thorns?
There’s not a hard-and-fast rule for how often to water Crown of thorns. The best way to determine this is to check the soil and only water when it’s bone dry. You can either stick your finger in the pot or use a moisture meter to check the soil below the surface. When you plant it in a deep pot, you can do this with a stick or chopstick. If it feels even a little bit moist, wait a few days and check it again.
Most people will need to water Crown of thorns about every two weeks in summer and once a month in winter, but there are several factors that can change the frequency. The section below lists some considerations that can help you to determine how often to water.
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What should I consider when watering my Crown of thorns?
There are several environmental conditions that will affect how your Crown of thorns needs to be watered, including the container size, soil type, temperature, and humidity.
First off, the container and soil you use will determine how often to water and how much water to use each time. Be sure you use a container with plenty of drainage holes in the bottom so extra water can escape the pot. A small container has less room for soil, meaning it won’t hold as much moisture, while a larger pot will stay wet longer and need to be watered less often. It’s important not to keep your Crown of thorns in an oversized pot as this can easily lead to overwatering. When repotting, move to just one size larger than the current container. A shallow container works better than a deep one, since Crown of thorns has shallow root systems.
Crown of thorns will need to be watered less often in winter and more often in the active growing season in spring and autumn. During the winter, growth slows down considerably and the plant isn’t using much energy or water. There is less water lost to evaporation in cooler winter air, meaning that soil stays wet for much longer than it would in the summer.
This also applies to the general climate around your home. If you live in a humid location with a lot of rain, you will need to water less often than if you live in a dry, arid climate. Remember that conditions at the same geographic location can vary significantly with the season and the use of indoor heating and air conditioning.
Outdoor Planting
If Crown of thorns is planted in the ground, after establishing a root system, it shouldn’t need supplemental water beyond what it receives through precipitation and dew. But if there is a long dry period, you may want to water occasionally. In other areas where Crown of thorns can only be grown in a container, this plant can be moved outside in the spring and summer when the temperature is proper and then brought back inside when temperatures start to drop. A potted Crown of thorns kept outside usually needs more water than the same plant kept indoors, because there is a lot more sun exposure even on a shaded porch.
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How to water Crown of thorns?
The best way to water Crown of thorns is to soak it thoroughly and then allow it to dry out before it gets watered again. Since this plant is somewhat drought tolerant, you can let it get quite dry before watering again. It is always better to give this type of plant too little water over too much.
When you water, make sure the soil gets thoroughly soaked throughout the whole pot. Don’t pour the water in just one spot, but rather try to go around the whole rim of the planter to be sure that it has a chance to get wet on all sides of the plant. The correct amount of water will depend on the size of your container and how much water your soil absorbs. Give your Crown of thorns enough water that it drains out from the drainage holes and then (ideally) leave the drained water in the saucer for about 20-30 minutes to absorb into dry pockets of soil. After that, discard any excess water that’s still in the saucer to avoid the soil getting waterlogged.
Bottom-watering is also an excellent method for Crown of thorns, as you can be sure that the soil gets thoroughly moistened. This process involves placing the pot into a saucer of water and allowing the soil to absorb moisture through the drainage holes. You will know that the soil has absorbed enough water when the top layer is moist. This takes a bit more time than top-watering, but is almost foolproof in getting an even distribution of water throughout the pot.
The original habitat of Crown of thorns is relatively dry with little rain, but when it rains, the soil will be thoroughly moistened. So you can mimic this situation by bottom-watering your plant when the soil is totally dry. Deep soil bathing is better than frequent light watering for Crown of thorns.
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Key Facts About Crown of thorns

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Attributes of Crown of thorns

Lifespan
Perennial
Plant Type
Succulent, Shrub
Planting Time
Late spring, Summer, Fall
Bloom Time
All year around
Plant Height
90 cm to 1.8 m
Spread
45 cm to 90 cm
Leaf Color
Green
Flower Size
1.2 cm
Flower Color
Red
Yellow
Pink
White
Gold
Fruit Color
Green
Stem Color
Green
Silver
Dormancy
Non-dormant
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
Growth Season
Spring, Summer, Fall, Winter
Pollinators
Bees, Beetles

Name story

Crown of thorns
This plant is a small yet woody shrub that gets its name from its sharp and half-inch long thorns that cover its main stems. Some people claim that the branches were cut to make the crown by the Romans to put it on Jesus. Hence, it's called the crown of thorns.

Symbolism

Stubborn and faithful, gentle and loyal, brave and elegant

Usages

Garden Use
Crown of thorns is an evergreen shrub commonly found in gardens of a warmer climate. It is prized for its attractively colored leaves that exemplify its bright green foliage. Its relatively short height makes it suitable for low hedges and borders. Crown of thorns is good for rock or Mediterranean gardens. Suggested companion plants include Kangaroo Paw or Blue Fescue to make a strong color contrast.

Trivia and Interesting Facts

The crown of thorns is probably the smallest flower, not as brilliant as the azalea, not as pure and elegant as the narcissus, not as beautiful and noble as the peony, but it lives decently. Many flowers and trees wither in the winter while the crown of thorns is not defeated by frost. It is still pleasant to the eye with tender and lovely flowers. Shaped like a butterfly, the small flower is made of two petals, and then form a small cluster, green in summer and red in winter. Placing several pots of them at home will make you feel like spring is always with you.

Scientific Classification of Crown of thorns

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Common Pests & Diseases About Crown of thorns

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Common issues for Crown of thorns based on 10 million real cases
Brown blotch
Brown blotch Brown blotch
Brown blotch
Brown spot is a common plant disease that can affect various plants, including Crown of thorns. It causes brown, necrotic spots on the leaves, impairing photosynthesis and making the plant susceptible to other pathogens. Managing this plant disease significantly maintains the plant's aesthetic value and overall health.
Leaf rot
Leaf rot Leaf rot
Leaf rot
Leaf rot is a disease that mainly affects Crown of thorns, causing the plant's foliage to decay, discolor, and fall off. The disease results from various fungi and bacteria or environmental influences, potentially leading to the death of the plant if left untreated.
Scars
Scars Scars
Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Underwatering
Underwatering Underwatering
Underwatering
Leaves may wilt for a variety of reasons.
Solutions: The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with. Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock. In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.
Flower withering
Flower withering Flower withering
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Caterpillars
Caterpillars Caterpillars
Caterpillars
Caterpillars are fleshy moth or butterfly larvae that come in an array of colors, patterns, and even hairstyles. They chew on leaves and flower petals, creating large, irregular holes.
Solutions: Even though caterpillars are diverse, they all chew on plant parts and can cause significant damage if present in large numbers. For severe cases: Apply insecticide. For an organic solution, spray plants with a Bacillus thuringiensis (Bt), which specifically affects the larval stage of moths and butterflies. Be sure to coat plants, since caterpillars need to ingest Bt for it to be effective. This will not harm other insects. Spray a chili extract. Chili seeds can be cooked in water to make a spicy spray that caterpillars don't like. Spray this mixture on the plants, but be aware it will also be spicy to humans. Introduce beneficial insects. Release beneficial insects to the garden that eat caterpillars, such as parasitic wasps. For less severe cases: Hand pick. Using gloves, pick off caterpillars on plants and dispose of them in a bucket of soapy water. Dust plants with diatomaceous earth. This powder is harmless to humans but irritates caterpillars. Therefore, it will make it difficult for caterpillars to move and eat.
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Brown blotch
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Brown blotch Disease on Crown of thorns?
What is Brown blotch Disease on Crown of thorns?
Brown spot is a common plant disease that can affect various plants, including Crown of thorns. It causes brown, necrotic spots on the leaves, impairing photosynthesis and making the plant susceptible to other pathogens. Managing this plant disease significantly maintains the plant's aesthetic value and overall health.
Symptom Analysis
Symptom Analysis
Crown of thorns's infected parts, primarily the leaves, exhibit scattered, irregular brownish spots. With time, these spots mature, turning a more intense brown to black. Consequentially, leaves may drop prematurely, and their loss impairs the plant's vigor.
What Causes Brown blotch Disease on Crown of thorns?
What Causes Brown blotch Disease on Crown of thorns?
1
Fungal pathogens
Brown spot is primarily triggered by the fungal pathogens Cercospora and Alternaria species.
2
Environmental conditions
High humidity and warm conditions facilitate the disease's development.
How to Treat Brown blotch Disease on Crown of thorns?
How to Treat Brown blotch Disease on Crown of thorns?
1
Non pesticide
Proper watering: Keeping Crown of thorns's leaves dry by watering at the base.

Pruning: Removing infected parts to minimize spread.

Air circulation: Providing adequate spacing in between plants for good air circulation.
2
Pesticide
Fungicide application: If the disease persists, consider applying suitable fungicides following the label instructions.

Copper sprays: These are beneficial in managing fungal diseases, as the ions disrupt the enzyme system of the fungi.
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Leaf rot
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Leaf rot Disease on Crown of thorns?
What is Leaf rot Disease on Crown of thorns?
Leaf rot is a disease that mainly affects Crown of thorns, causing the plant's foliage to decay, discolor, and fall off. The disease results from various fungi and bacteria or environmental influences, potentially leading to the death of the plant if left untreated.
Symptom Analysis
Symptom Analysis
Crown of thorns's main symptoms include discolored or brown leaves, wilted foliage, and halting growth. Advanced stages witness a mushy, rotted appearance of the leaves, which eventually fall off the plant.
What Causes Leaf rot Disease on Crown of thorns?
What Causes Leaf rot Disease on Crown of thorns?
1
Overwatering
Excessive moisture creates favourable conditions for fungi or bacteria growth.
2
Poor ventilation
Insufficient air circulation encourages the growth of fungi that cause leaf rot.
3
Pathogens
Fungal or bacterial agents such as Phytophthora and Fusarium cause this affliction.
How to Treat Leaf rot Disease on Crown of thorns?
How to Treat Leaf rot Disease on Crown of thorns?
1
Non pesticide
Proper watering: Avoid overwatering and ensure well-draining soil conditions.

Enhanced ventilation: Ensure proper air circulation to prevent fungal growth.

Infected material removal: Manually eliminate infected leaves to prevent further dispersion of the disease.
2
Pesticide
Fungicides: Use suitable fungicides to manage fungal-caused leaf rot.

Bactericides: For bacterial leaf rot, apply relevant bactericides.
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Scars
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Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Solutions
Each source of scarring requires a different approach to help your plant recover.
  1. Protect the trunk and leaves from physical damage like scrapes.
  2. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
  3. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
  4. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
  1. Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
  2. Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
  3. Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
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Underwatering
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Underwatering
Leaves may wilt for a variety of reasons.
Overview
Overview
Underwatering plants is one of the quickest ways to kill them. This is something that most gardeners are well aware of. Unfortunately, knowing exactly how much water a plant needs can be tricky, especially considering that underwatering and overwatering present similar symptoms in plants.
Therefore, it’s important to be vigilant and attentive to each plants’ individual needs.
Symptom Analysis
Symptom Analysis
As mentioned earlier, overwatering and underwatering present similar symptoms in plants. These symptoms include poor growth, wilted leaves, defoliation, and brown leaf tips or margins. Ultimately, both underwatering and overwatering can lead to the death of a plant.
The easiest way to determine whether a plant has too much water or too little is to look at the leaves. If underwatering is the culprit, the leaves will look brown and crunchy, while if it’s overwatering, they will appear yellow or a pale green in color.
When this issue first begins, there may be no noticeable symptoms at all, particularly in hardy or drought-tolerant plants. However, they will begin to wilt once they start suffering from a lack of water. The edges of the plant’s leaves will become brown or curled. Soil pulling away from the edges of the planter is a telltale sign, or a crispy, brittle stem.
Prolonged underwatering can cause a plant’s growth to become stunted. The leaves might drop and the plant can be more susceptible to pest infestations, too.
Disease Cause
Disease Cause
Underwatering is caused by, quite simply, not watering plants often or deeply enough. There is a heightened risk of underwatering if any of these situations apply:
  • Extreme heat and dry weather (when growing outdoors)
  • Grow lights or indoor lighting that is too bright or intense for the type of plant
  • Using fast-draining growing media such as sand
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Flower withering
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Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
  • Wilted, droopy flowers
  • Petals and leaves begin to wrinkle
  • Brown papery streaks or spots appear on the petals and leaf tips
  • Flowerhead shrink in size
  • Petal color fades
  • Yellowing leaves
  • Complete death of the flower
Disease Cause
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
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Caterpillars
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Caterpillars
Caterpillars are fleshy moth or butterfly larvae that come in an array of colors, patterns, and even hairstyles. They chew on leaves and flower petals, creating large, irregular holes.
Overview
Overview
Caterpillars can cause problems for home gardeners. If not managed, these insects can defoliate a plant in just a matter of days. However, home gardeners face a challenge because these caterpillars eventually turn into beautiful butterflies and moths, which are important for pollination and the general ecosystem.
There are thousands of different species of caterpillars and many will only target certain plants. If caterpillars are posing a problem, they can be removed by hand, or gardeners can use insect-proof netting to protect their valuable plants.
Symptom Analysis
Symptom Analysis
Caterpillars are the larvae of butterflies and moths. During the warmer months, butterflies and moths that visit gardens will lay their eggs on the underside of leaves.
When the tiny eggs hatch, the young larvae emerge and start feeding on the leaves of the plant. Depending on how many larvae have hatched, they can easily defoliate the plant in a very short period of time. Caterpillars will shed their skin as they grow, around 4 or 5 times during this feeding cycle.
Symptoms of caterpillars eating plants appear as holes in the leaves. The edges of the leaves may be eaten away as well, and flowers can be affected as well.
Some are easy to see, but others need to be searched for. This is because their bodies are often camouflaged to look like part of the plant. Gardeners need to look carefully along the stems of the plant as well as under the leaves. Also, look for tiny white, yellow, or brown eggs that can be found in groups on the underside of leaves.
Once the caterpillar is fully grown, it transforms into a pupa or chrysalis. Then, after a period of time that varies according to the species, a butterfly or moth will emerge from the pupa and the cycle begins again.
Solutions
Solutions
Even though caterpillars are diverse, they all chew on plant parts and can cause significant damage if present in large numbers.
For severe cases:
  1. Apply insecticide. For an organic solution, spray plants with a Bacillus thuringiensis (Bt), which specifically affects the larval stage of moths and butterflies. Be sure to coat plants, since caterpillars need to ingest Bt for it to be effective. This will not harm other insects.
  2. Spray a chili extract. Chili seeds can be cooked in water to make a spicy spray that caterpillars don't like. Spray this mixture on the plants, but be aware it will also be spicy to humans.
  3. Introduce beneficial insects. Release beneficial insects to the garden that eat caterpillars, such as parasitic wasps.
For less severe cases:
  1. Hand pick. Using gloves, pick off caterpillars on plants and dispose of them in a bucket of soapy water.
  2. Dust plants with diatomaceous earth. This powder is harmless to humans but irritates caterpillars. Therefore, it will make it difficult for caterpillars to move and eat.
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Crown of thorns and Their Toxicity

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* The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.
Highly Toxic to Humans
Highly Toxic to Humans
Although a popular houseplant, crown of thorns is highly poisonous, with ingestion of any part causing moderate toxicity. Its sap contains harmful chemicals that can result in both eye and skin irritation if not handled with caution. Contact with the eyes may cause puffing and swelling, and contact with the skin will likely lead to dermatitis. Poisoning through ingestion can cause irritation and blistering of the mouth and throat, vomiting, and abdominal/stomach pain. If the sap is ingested, it may cause temporary blindness. Poisoning most often occurs in children because of crown of thorns's bright, inviting flowers.
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Who Is Most at Risk of Plant Poisoning?
Your pets like cats and dogs can be poisoned by them as well!
1
Do not let your lovely pets eat any parts, nor contact with the sap of toxic or unknown plants;
2
It’s better to kill those growing around your house. Wear long-sleeved shirts, pants and gloves with sharp tools to dig it out completely;
3
Clean the tools with rubbing alcohol or soap and water but do not do that with bare hands;
4
Clean your hands and skin once exposed to plants with soap and water;
5
Consider using barrier creams that contain bentoquatam to prevent poison oak, ivy and sumac rashes;
6
Dump it in special trash cans in sealed garbage packages, and do not let your pets reach it;Do not let your lovely pets eat any parts, nor contact with the sap of toxic or unknown plants;
7
If you take your pets to hike with you in the wild, please don’t let them eat any plants that you don’t know;
8
Once your pets eat, touch or inhale anything from toxic plants and act abnormally, please call the doctors for help ASAP!
pets
Pets
Some pets are less likely than children to eat and touch just about everything. This is good, as a pet owner. However, you know your pet best, and it is up to you to keep them safe. There are plenty of poisonous weeds that can grow within the confines of your lawn, which might make your dogs or cats ill or worse if they eat them. Try to have an idea of what toxic plants grow in your area and keep them under control and your pets away from them.
pets
Common Toxic Houseplants
Common Toxic Houseplants
When it comes to decorating a house, there is nothing more refreshing than adding some beautiful houseplants. Some common house plants can also be toxic.

Aloe

aloe
Aloe is famous for its sunburn-soothing properties and its gorgeous desert design. However, many people do not realize that the latex the aloe vera plant produces can be mildly toxic to pets and children.

The latex contains a chemical compound known as saponin. Which when ingested, can cause vomiting, diarrhea, and low blood sugar. This, if left unchecked, can lead to dehydration and electrolyte imbalance. The proper response is to contact poison control or a veterinarian to know what to do in your particular circumstance if either your child or pet consumes aloe.

The latex of the plant is similar to the sap of the tree. It is inside the leaf, but sticks mainly toward the edges. If aloe gel is prepared properly it should be safe for use, but be sure to apply it only topically when treating burns.

Philodendron

Philodendron
Philodendron, also known as sweetheart vine, has become a resident at many houses and even businesses. They are glossy green and the leaves elegantly split, displaying interesting designs. Behind this beauty there is a needle-like toxin called calcium oxalate crystals.

These crystals are held within the plant and only affect you, your pets, or your loved ones if the plant tissue is broken. If ingested, the crystals can cause severe swelling, difficulty breathing, stomach pain, burning and pain. If they are accidentally caught on the skin, they can cause skin irritation.

If anyone accidentally ingests philodendron and they find it difficult to breathe or their tongue starts to swell up, it is important to seek medical attention immediately to avoid suffocation. If you have very young children or pets who have a tendency to tear at plants, keep them away from any philodendrons.

Peace Lily

Peace Lily
Peace lilies produce stunningly white flowers that bring to mind peace and serenity. This is one reason they are invited into our homes and given a place to stay. However, similar to philodendrons, the peace lily contains oxalate crystals known as raphides.

The raphides, once ingested, will cause swelling and burning sensations and can also cause skin irritation. Both pets and humans can get these symptoms so it is important to keep these plants from anyone who is likely to tear or chew it. Symptoms can become dire if the raphides cause the tongue and throat to swell to a point where the person or pet is having difficulty breathing. Seek proper medical attention if this is the case.

Snake Plant

Snake Plant
The snake plant is an interesting and popular house plant. Its stark architecture and wavy coloring has made it a fan favorite. This plant too, however, is toxic when ingested or if the sap touches your skin.

Snake plant sap will cause rashes if it comes into contact with your skin. In addition, it will cause diarrhea and vomiting when ingested. Again these symptoms are very serious and would be best avoided by keeping snake plants out of reach or by choosing a different houseplant.
Common Toxic Garden Plants
Common Toxic Garden Plants

Daffodil

Daffodil
Daffodils are a strikingly colorful flower. This can sometimes bring them much attention not from just onlooking adults but children as well. Since kids are more drawn to colorful objects, they may have a higher chance of just grabbing the flower and eating it. Adults have also been known to accidentally grab daffodil bulbs instead of onions.

Why are these mistakes so dangerous? Daffodils contain lycorine, which can induce nausea, vomiting, and diarrhea. It also contains oxalates which can cause swelling and pain. The symptoms can be worse in animals, because if your pets eat daffodils they may experience drowsiness, low blood pressure or even liver damage.

Make sure to call poison control when these symptoms set in. The vomiting and diarrhea have been known to go away after 3 hours, but it is better to be safe than sorry. Ingesting liquids to keep hydration up can be important. If the patient is having difficulty breathing, seek medical attention immediately.

Hydrangea

Hydrangea
Hydrangeas are unique, with their soft blue and pink flowers. They are a great addition to any garden, but should not be snacked on—not that you would want to. Hydrangeas can be especially nasty because they contain compounds known as glycosides. These will release hydrogen cyanide into the bloodstream when consumed. This will block your body’s ability to uptake oxygen to the cells in your body.

The way to combat this kind of poisoning is through getting IVs from the vet or doctor. It is important to contact your medical professional immediately since the symptoms can be fatal within minutes or hours.

Rhododendrons

Rhododendrons
Rhododendron, the state flower of Washington, is also toxic. The multitudinous, pink flowers can be quite dangerous. All parts of this plant are toxic, the leaves and seeds more so than the flowers. However, even the nectar of the flower is toxic and in the Mediterranean, where rhododendrons grow in more dense quantities, the honey from bees who gather rhododendron nectar can be poisonous.

Normally kids and pets do not eat enough to experience the full poisoning effect. However, just eating two leaves is enough to be considered dangerous. The grayanotoxin glycosides within the rhododendron can cause vomiting, diarrhea and irregular heartbeats. Things can get very serious when too much rhododendron is consumed and can lead to necessary medical intervention.

Start by calling poison control first if you suspect anyone has been munching on rhododendrons. The experts there will be able to help guide you through the necessary processes to cure your loved one.

Rhubarb

Rhubarb
Yummy rhubarb has a nasty side to it. While the stems are used in many recipes, including for rhubarb strawberry pie, the leaves are toxic. They contain oxalic acid which is known to blister the mouth, cause nausea, vomiting, diarrhea and kidney stones. The leaves are known to be more toxic to pets than humans, but in either case, it is important to contact poison control immediately to figure out necessary steps to cure the patient.
Common Toxic Weeds in the Yard
Common Toxic Weeds in the Yard

Bittersweet Nightshade

Bittersweet Nightshade
Nightshade is an invasive, noxious weed that is extremely poisonous. It has been found along the East and West Coast of the U.S. It makes its home in areas with disturbed soil. This could be near your garden or areas that have recently had bushes/trees put in.

These plants are dark green with purple flowers that develop into bright red berries. The whole plant is toxic and should be avoided by pets and children alike. If ingested it can cause nausea, vomiting, and diarrhea. The colorful berries are especially enticing to young children. If you see any plants that look similar to tomato or pepper plants that you did not plant in your yard, it is best to just pull them immediately.

Call poison control immediately if you think someone has fallen victim to nightshade.

Buttercups

Buttercups
Buttercups are found throughout the United States, especially in wet areas. The shiny, yellow flowers will pop up in the springtime, accompanying their dandelion friends. However, unlike dandelions, buttercups are not edible.

Buttercups will release a compound called protoanemonin. This toxin is known to cause vomiting, diarrhea, bloody stool, hypersalivation, depression, blisters, and more. These symptoms will affect both humans and animals. The sap may also cause irritation when it comes into contact with skin. These yellow flowers are dangerous and children should be observed cautiously when around them.

Foxgloves

Foxgloves
Foxgloves are beautiful plants that build towers out of vivid purple bell-shaped blossoms. They are very pretty to look at, but they contain a compound known as digoxin. This chemical is used in certain medicines to help people with certain heart conditions. However, the medicine is made by specialists, whereas someone eating foxgloves will receive unregulated amounts of the chemical.

This toxin can make you vomit and lower your heartbeat. This often causes dizziness and faintness. It is extremely important to call poison control immediately to know what to do in the case of foxglove poisoning. Some people have confused the young leaves of foxglove with borage, making adult foragers at risk as well as kids and pets.
How to Tend to or Get Rid of Toxic Plants
How to Tend to or Get Rid of Toxic Plants
Now that you know where to start with toxic plant identification, let us discuss how to either tend to the poisonous plants you decide to keep or get rid of them that plague your yard.

How to Tend to Poisonous Plants

Many plants that are toxic when ingested are also skin irritants. The philodendron is a good example of this. When the sap comes into contact with skin, it can cause a rash to form. To help protect yourself when tending to toxic plants, it is important to wear some sort of gloves.
Tend
Latex gloves may be the best solution due to their disposability. Regular gloves could potentially keep the poisonous sap on their surface. If the gloves aren’t cleaned then you could accidentally touch the irritant or pass it to someone else.

In addition you will want to plan where to keep your deadly beauties. If you have a toxic indoor plant try to keep it up high or out of reach of children and pets. This will keep accidents few and far between. Another idea is keeping your plants in areas that are usually inaccessible to children or pets. Areas such as an office, study room, or guest bedroom could be good locations. If applicable, you could also set up a terrarium for your little plant baby, making it more difficult for curious hands or paws to access.
tend2
If you plan to have outdoor plants, location will be key. You will want to put plants in an area that will be inaccessible to children, pets and even wild animals. You will probably want to avoid planting the plants in the front of your house if kids walk by on a regular basis, just to be cautious. Having the plants behind a fence will be best, but use your discretion when choosing a spot.

How to Get Rid of Poisonous Plants

plants
The easiest but possibly most controversial way to get rid of poisonous plants is by using herbicides. This can be especially easy if you own a grass lawn and use an herbicide that targets broadleaf (non-grass) species. You can find many herbicides meant for yard use by simply searching the term online. Once you have purchased the herbicide you will want to make sure to follow the label posted on the container. If you follow the instructions precisely, then everything should run smoothly for you.

If you don’t plan on using herbicides, there are a few organic methods you can use to try to get rid of toxic plants. You can manually pull the plants out of the ground. This is probably one of the most difficult methods because there is no assurance that you will get the whole plant out this way.

You can also try pouring boiling hot water or spraying white vinegar on the target plants. This may take more time than using a synthetic herbicide, but you can feel a little better about using these products.

You can also try to use wood chips to cover a certain area where you do not want anything to grow. This will not stop all the weeds, but the few that make it through can be easily picked by hand.
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Who Is Most at Risk of Plant Poisoning?
Everyone should keep the following in mind to prevent being poisoned:
1
Do not eat any parts, nor contact with the sap of toxic or unknown plants;
2
If you need to kill it, wear long-sleeved shirts, pants and gloves with sharp tools to dig it out completely;
3
Clean the tools with rubbing alcohol or soap and water but do not do that with bare hands;
4
Clean your hands and skin once exposed to plants with soap and water;
5
Consider using barrier creams that contain bentoquatam to prevent poison oak, ivy and sumac rashes;
6
Dump it in special trash cans in sealed garbage packages;
7
Wear properly when you hiking or working in the wilderness. Long pants, long sleeves, gloves, hiking shoes, etc., that protect you from being hurt by any plants;
8
Once you or your family aren’t feeling well after eating, touching or inhaling anything from toxic plants, please call your doctor for help ASAP!
Outdoor Workers
Outdoor Workers and Recreationalists
Those who enjoy the outdoors either as a hobby or as part of their work will rarely see a plant and decide to munch on it (although the scenario is not unheard of). However, they do tend to deal with moving through and brushing aside plants. These people are more at risk of being poisoned by touching toxic plants than by ingesting them.
Outdoor Workers
Foragers
Foragers
Foraging for food and medicinal plants is a desirable skill among people who want to feel at one with the land. This hobby can be very useful and enjoyable, but if done wrong , it can lead to disastrous effects. People who forage are picking and grabbing plants with the full intention of using those plants, most of the time to ingest them.
Foragers
Children
Children
While outdoor workers are more likely to touch poison and foragers are more likely to ingest poison, children can easily do both. These bundles of joy just love to run around and explore the world. They enjoy touching things and occasionally shoving random stuff in their mouth; this is a terrible combination with toxic plants in the mix.
If you let your children run about, it is important to know what are the local toxic plants that they could accidentally get into. Try to educate the children and steer them away from where the toxic plants are located.
Children
Common Toxic Houseplants
Common Toxic Houseplants
When it comes to decorating a house, there is nothing more refreshing than adding some beautiful houseplants. Some common house plants can also be toxic.

Aloe

aloe
Aloe is famous for its sunburn-soothing properties and its gorgeous desert design. However, many people do not realize that the latex the aloe vera plant produces can be mildly toxic to pets and children.

The latex contains a chemical compound known as saponin. Which when ingested, can cause vomiting, diarrhea, and low blood sugar. This, if left unchecked, can lead to dehydration and electrolyte imbalance. The proper response is to contact poison control or a veterinarian to know what to do in your particular circumstance if either your child or pet consumes aloe.

The latex of the plant is similar to the sap of the tree. It is inside the leaf, but sticks mainly toward the edges. If aloe gel is prepared properly it should be safe for use, but be sure to apply it only topically when treating burns.

Philodendron

Philodendron
Philodendron, also known as sweetheart vine, has become a resident at many houses and even businesses. They are glossy green and the leaves elegantly split, displaying interesting designs. Behind this beauty there is a needle-like toxin called calcium oxalate crystals.

These crystals are held within the plant and only affect you, your pets, or your loved ones if the plant tissue is broken. If ingested, the crystals can cause severe swelling, difficulty breathing, stomach pain, burning and pain. If they are accidentally caught on the skin, they can cause skin irritation.

If anyone accidentally ingests philodendron and they find it difficult to breathe or their tongue starts to swell up, it is important to seek medical attention immediately to avoid suffocation. If you have very young children or pets who have a tendency to tear at plants, keep them away from any philodendrons.

Peace Lily

Peace Lily
Peace lilies produce stunningly white flowers that bring to mind peace and serenity. This is one reason they are invited into our homes and given a place to stay. However, similar to philodendrons, the peace lily contains oxalate crystals known as raphides.

The raphides, once ingested, will cause swelling and burning sensations and can also cause skin irritation. Both pets and humans can get these symptoms so it is important to keep these plants from anyone who is likely to tear or chew it. Symptoms can become dire if the raphides cause the tongue and throat to swell to a point where the person or pet is having difficulty breathing. Seek proper medical attention if this is the case.

Snake Plant

Snake Plant
The snake plant is an interesting and popular house plant. Its stark architecture and wavy coloring has made it a fan favorite. This plant too, however, is toxic when ingested or if the sap touches your skin.

Snake plant sap will cause rashes if it comes into contact with your skin. In addition, it will cause diarrhea and vomiting when ingested. Again these symptoms are very serious and would be best avoided by keeping snake plants out of reach or by choosing a different houseplant.
Common Toxic Garden Plants
Common Toxic Garden Plants

Daffodil

Daffodil
Daffodils are a strikingly colorful flower. This can sometimes bring them much attention not from just onlooking adults but children as well. Since kids are more drawn to colorful objects, they may have a higher chance of just grabbing the flower and eating it. Adults have also been known to accidentally grab daffodil bulbs instead of onions.

Why are these mistakes so dangerous? Daffodils contain lycorine, which can induce nausea, vomiting, and diarrhea. It also contains oxalates which can cause swelling and pain. The symptoms can be worse in animals, because if your pets eat daffodils they may experience drowsiness, low blood pressure or even liver damage.

Make sure to call poison control when these symptoms set in. The vomiting and diarrhea have been known to go away after 3 hours, but it is better to be safe than sorry. Ingesting liquids to keep hydration up can be important. If the patient is having difficulty breathing, seek medical attention immediately.

Hydrangea

Hydrangea
Hydrangeas are unique, with their soft blue and pink flowers. They are a great addition to any garden, but should not be snacked on—not that you would want to. Hydrangeas can be especially nasty because they contain compounds known as glycosides. These will release hydrogen cyanide into the bloodstream when consumed. This will block your body’s ability to uptake oxygen to the cells in your body.

The way to combat this kind of poisoning is through getting IVs from the vet or doctor. It is important to contact your medical professional immediately since the symptoms can be fatal within minutes or hours.

Rhododendrons

Rhododendrons
Rhododendron, the state flower of Washington, is also toxic. The multitudinous, pink flowers can be quite dangerous. All parts of this plant are toxic, the leaves and seeds more so than the flowers. However, even the nectar of the flower is toxic and in the Mediterranean, where rhododendrons grow in more dense quantities, the honey from bees who gather rhododendron nectar can be poisonous.

Normally kids and pets do not eat enough to experience the full poisoning effect. However, just eating two leaves is enough to be considered dangerous. The grayanotoxin glycosides within the rhododendron can cause vomiting, diarrhea and irregular heartbeats. Things can get very serious when too much rhododendron is consumed and can lead to necessary medical intervention.

Start by calling poison control first if you suspect anyone has been munching on rhododendrons. The experts there will be able to help guide you through the necessary processes to cure your loved one.

Rhubarb

Rhubarb
Yummy rhubarb has a nasty side to it. While the stems are used in many recipes, including for rhubarb strawberry pie, the leaves are toxic. They contain oxalic acid which is known to blister the mouth, cause nausea, vomiting, diarrhea and kidney stones. The leaves are known to be more toxic to pets than humans, but in either case, it is important to contact poison control immediately to figure out necessary steps to cure the patient.
Common Toxic Weeds in the Yard
Common Toxic Weeds in the Yard

Bittersweet Nightshade

Bittersweet Nightshade
Nightshade is an invasive, noxious weed that is extremely poisonous. It has been found along the East and West Coast of the U.S. It makes its home in areas with disturbed soil. This could be near your garden or areas that have recently had bushes/trees put in.

These plants are dark green with purple flowers that develop into bright red berries. The whole plant is toxic and should be avoided by pets and children alike. If ingested it can cause nausea, vomiting, and diarrhea. The colorful berries are especially enticing to young children. If you see any plants that look similar to tomato or pepper plants that you did not plant in your yard, it is best to just pull them immediately.

Call poison control immediately if you think someone has fallen victim to nightshade.

Buttercups

Buttercups
Buttercups are found throughout the United States, especially in wet areas. The shiny, yellow flowers will pop up in the springtime, accompanying their dandelion friends. However, unlike dandelions, buttercups are not edible.

Buttercups will release a compound called protoanemonin. This toxin is known to cause vomiting, diarrhea, bloody stool, hypersalivation, depression, blisters, and more. These symptoms will affect both humans and animals. The sap may also cause irritation when it comes into contact with skin. These yellow flowers are dangerous and children should be observed cautiously when around them.

Foxgloves

Foxgloves
Foxgloves are beautiful plants that build towers out of vivid purple bell-shaped blossoms. They are very pretty to look at, but they contain a compound known as digoxin. This chemical is used in certain medicines to help people with certain heart conditions. However, the medicine is made by specialists, whereas someone eating foxgloves will receive unregulated amounts of the chemical.

This toxin can make you vomit and lower your heartbeat. This often causes dizziness and faintness. It is extremely important to call poison control immediately to know what to do in the case of foxglove poisoning. Some people have confused the young leaves of foxglove with borage, making adult foragers at risk as well as kids and pets.
How to Tend to or Get Rid of Toxic Plants
How to Tend to or Get Rid of Toxic Plants
Now that you know where to start with toxic plant identification, let us discuss how to either tend to the poisonous plants you decide to keep or get rid of them that plague your yard.

How to Tend to Poisonous Plants

Many plants that are toxic when ingested are also skin irritants. The philodendron is a good example of this. When the sap comes into contact with skin, it can cause a rash to form. To help protect yourself when tending to toxic plants, it is important to wear some sort of gloves.
Tend
Latex gloves may be the best solution due to their disposability. Regular gloves could potentially keep the poisonous sap on their surface. If the gloves aren’t cleaned then you could accidentally touch the irritant or pass it to someone else.

In addition you will want to plan where to keep your deadly beauties. If you have a toxic indoor plant try to keep it up high or out of reach of children and pets. This will keep accidents few and far between. Another idea is keeping your plants in areas that are usually inaccessible to children or pets. Areas such as an office, study room, or guest bedroom could be good locations. If applicable, you could also set up a terrarium for your little plant baby, making it more difficult for curious hands or paws to access.
tend2
If you plan to have outdoor plants, location will be key. You will want to put plants in an area that will be inaccessible to children, pets and even wild animals. You will probably want to avoid planting the plants in the front of your house if kids walk by on a regular basis, just to be cautious. Having the plants behind a fence will be best, but use your discretion when choosing a spot.

How to Get Rid of Poisonous Plants

plants
The easiest but possibly most controversial way to get rid of poisonous plants is by using herbicides. This can be especially easy if you own a grass lawn and use an herbicide that targets broadleaf (non-grass) species. You can find many herbicides meant for yard use by simply searching the term online. Once you have purchased the herbicide you will want to make sure to follow the label posted on the container. If you follow the instructions precisely, then everything should run smoothly for you.

If you don’t plan on using herbicides, there are a few organic methods you can use to try to get rid of toxic plants. You can manually pull the plants out of the ground. This is probably one of the most difficult methods because there is no assurance that you will get the whole plant out this way.

You can also try pouring boiling hot water or spraying white vinegar on the target plants. This may take more time than using a synthetic herbicide, but you can feel a little better about using these products.

You can also try to use wood chips to cover a certain area where you do not want anything to grow. This will not stop all the weeds, but the few that make it through can be easily picked by hand.
Continue reading in our app - it's better
A database of 400000+ plants and unlimited guides at your fingertips...
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Scan the QR code with your phone camera to download the app
weed

Weed Control About Crown of thorns

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Weeds
Crown of thorns is a flower-viewing plant that always attracts people's attention. But this beautiful plant has extremely high toxicity and spikes, which can easily hurt people who come into contact with it.
weed
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Do you have weeds in your garden?
Differentiate them from your plants by a picture, and learn how to control them.
distribution

Distribution of Crown of thorns

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Habitat of Crown of thorns

Variety of bush, Forest habitats
Northern Hemisphere
South Hemisphere

Distribution Map of Crown of thorns

Crown of thorns is native to Madagascar, where its native habitat includes dry thickets and rocky areas. It has been introduced in India, Southeast Asia, Bolivia, Central America, and Florida. It is widely cultivated as an ornamental or houseplant in warm climates. Crown of thorns is listed as invasive in Anguilla, and its dense thickets sometimes become invasive in native countries.
distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
habit
care_scenes

More Info on Crown Of Thorns Growth and Care

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Basic Care Guide
Common Pests & Diseases
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Water
Every 3 weeks
Crown of thorns originates from the arid plains and rainforest margins of Madagascar, embodying resilience in typically scarce rainfall conditions. This suggests a low requirement for watering, reflected in its knack for water storage within its spiky stems. Overwatering can replicate a rarely occurring, detrimental flood, hence it prefers sporadic watering, with thorough drying between to prevent root rot.
Watering Techniques
Lighting
Full sun
Crown of thorns thrives under an abundant exposure to sunlight, suited to areas that receive ample, yet not excessively scorching sun rays throughout the day. Originating from sun-soaked habitats, it can also adapt to conditions where light intensity is somewhat diminished. However, either too little or too much sunlight may adversely affect its growth.
Best Sunlight Practices
Temperature
0 - 43 ℃
The crown of thorns plant is native to tropical and subtropical regions, where the average temperature range is around 20 to 38 ℃ (68 to 100.4 ℉). The plant prefers warm temperatures and does not tolerate cold temperatures well. In colder seasons, it is recommended to keep the temperature between 18 to 24 ℃ (64.4 to 75.2 ℉) to help the plant adjust.
Temp for Healthy Growth
Transplant
18-24 inches
The perfect time to transplant your crown of thorns is during the warm months of late spring to early summer! This allows for optimal root establishment in its new location. Choose a sunny spot with well-draining soil. Keep it cozy, and your crown of thorns will thrive!
Transplant Techniques
Pollination
Normal
Bursting with a fascinating pollination routine, crown of thorns predominantly relies on bees and beetles for successful pollination. The plant lures these industrious pollinators with its brightly colored bracts and nectar rewards. Perfectly synchronized, crown of thorns's flowering often occurs between spring and late summer to capitalize on increased insect activity. This well-timed interaction underscores the marvel of nature and the plant's role in sustaining biodiversity.
Pollination Techniques
Overwinter
0 - 43 ℃
Crown of thorns hails from a tropical, warm Madagascar, naturally enduring mild winters. This heat-lover must adapt to indoor living once frost approaches. Winter care includes a bright location, reduced watering, and cooler temperatures - ideally above 50°F (10°C). A mesmerising winter companion, crown of thorns will thank you for keeping it safe from frost.
Winter Techniques
Brown blotch
Brown spot is a common plant disease that can affect various plants, including Crown of thorns. It causes brown, necrotic spots on the leaves, impairing photosynthesis and making the plant susceptible to other pathogens. Managing this plant disease significantly maintains the plant's aesthetic value and overall health.
Learn More About the Disease
Leaf rot
Leaf rot is a disease that mainly affects Crown of thorns, causing the plant's foliage to decay, discolor, and fall off. The disease results from various fungi and bacteria or environmental influences, potentially leading to the death of the plant if left untreated.
Learn More About the Disease
Toxic
Highly Toxic to Humans
Although a popular houseplant, crown of thorns is highly poisonous, with ingestion of any part causing moderate toxicity. Its sap contains harmful chemicals that can result in both eye and skin irritation if not handled with caution. Contact with the eyes may cause puffing and swelling, and contact with the skin will likely lead to dermatitis. Poisoning through ingestion can cause irritation and blistering of the mouth and throat, vomiting, and abdominal/stomach pain. If the sap is ingested, it may cause temporary blindness. Poisoning most often occurs in children because of crown of thorns's bright, inviting flowers.
Toxic Details
Feng shui direction
South
Crown of thorns's spiky appearance may evoke strong, protective energy, yet its vibrant flowers symbolize blossoming opportunities. Facing South, it's believed to support recognition and fame, as fiery energies align with this direction. However, caution with placement is advised, as sharp features could potentially disrupt energy flow.
Fengshui Details
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Plants Related to Crown of thorns

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Snake plant
Snake plant
Snake plant can be considered a houseplant and an architectural display due to its sword-like leaves with bold striping patterns, which are distinctive and eye-catching. However, use caution with this plant because it is poisonous when ingested and can cause nausea, vomiting, and even swelling of the throat and tongue.
Taro
Taro
Taro (Colocasia esculenta) is a tropical plant native to southern India and Southeast Asia. It is most commonly grown as a root vegetable and has a wide variety of culinary uses. Taro is considered one of the most ancient crops in history.
Garden croton
Garden croton
The garden croton is a showy tropical display that does well indoors or in warm climates. Known for its attractive foliage, this plant can have both color and structural variations in its leaves. Leaf colors can include orange, yellow, scarlet, white, and green, and many times all are present on one plant.
Flamingo flower
Flamingo flower
Flamingo flower (Anthurium andraeanum) is an ornamental perennial plant, famous for its pink or bright red heart-shaped flowers with very prominent pistils. Aside from its decorative attributes, flamingo flower is said to have excellent air-purifying properties.
Bitter dock
Bitter dock
Bitter dock (Rumex obtusifolius) grows wild in shady, temperate areas around the world. Its leaves and stems are edible when young, as are the seeds. It was used in Medieval European folk medicine, and the roots can be used to make yellow dye.
Apple
Apple
Apple is the most widely cultivated tree fruit around the globe. The three top apple-producing countries are China, the United States, and Poland with an economic impact of $3.55 billion in 2017. There are more than 7,500 known cultivars of apples throughout the world.
Cape jasmine
Cape jasmine
Gardenia jasminoides is an evergreen shrub with unique, glossy evergreen leaves and stunning flowers. The sophisticated, matte white flowers are often used in bouquets. The exceptional beauty of this ornamental plant has made it a popular and highly appreciated plant amongst gardeners and horticulturalists.
Golden pothos
Golden pothos
The golden pothos (Epipremnum aureum) is a popular houseplant that is commonly seen in Australia, Asia, and the West Indies. It goes by many nicknames, including "devil's ivy", because it is so hard to kill and can even grow in low light conditions. Golden pothos has poisonous sap, so it should be kept away from pets and children.
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Crown of thorns
Euphorbia milii
Also known as: Christ thorn
The Euphorbia milii is commonly known as the crown of thorns or Christ thorn, as it is believed to the plant associated with the crown of thorns that was worn by Christ. It needs to stay above 10 ℃ with full sun.
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Water
Every 3 weeks
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Sunlight
Sunlight
Full sun
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Toxic to Humans
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Questions About Crown of thorns

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What should I do if I water my Crown of thorns too much or too little?
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Key Facts About Crown of thorns

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Attributes of Crown of thorns

Lifespan
Perennial
Plant Type
Succulent, Shrub
Planting Time
Late spring, Summer, Fall
Bloom Time
All year around
Plant Height
90 cm to 1.8 m
Spread
45 cm to 90 cm
Leaf Color
Green
Flower Size
1.2 cm
Flower Color
Red
Yellow
Pink
White
Gold
Fruit Color
Green
Stem Color
Green
Silver
Dormancy
Non-dormant
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
Growth Season
Spring, Summer, Fall, Winter
Pollinators
Bees, Beetles
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Name story

Crown of thorns
This plant is a small yet woody shrub that gets its name from its sharp and half-inch long thorns that cover its main stems. Some people claim that the branches were cut to make the crown by the Romans to put it on Jesus. Hence, it's called the crown of thorns.

Symbolism

Stubborn and faithful, gentle and loyal, brave and elegant

Usages

Garden Use
Crown of thorns is an evergreen shrub commonly found in gardens of a warmer climate. It is prized for its attractively colored leaves that exemplify its bright green foliage. Its relatively short height makes it suitable for low hedges and borders. Crown of thorns is good for rock or Mediterranean gardens. Suggested companion plants include Kangaroo Paw or Blue Fescue to make a strong color contrast.

Trivia and Interesting Facts

The crown of thorns is probably the smallest flower, not as brilliant as the azalea, not as pure and elegant as the narcissus, not as beautiful and noble as the peony, but it lives decently. Many flowers and trees wither in the winter while the crown of thorns is not defeated by frost. It is still pleasant to the eye with tender and lovely flowers. Shaped like a butterfly, the small flower is made of two petals, and then form a small cluster, green in summer and red in winter. Placing several pots of them at home will make you feel like spring is always with you.

Scientific Classification of Crown of thorns

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Common Pests & Diseases About Crown of thorns

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Common issues for Crown of thorns based on 10 million real cases
Brown blotch
Brown blotch Brown blotch Brown blotch
Brown spot is a common plant disease that can affect various plants, including Crown of thorns. It causes brown, necrotic spots on the leaves, impairing photosynthesis and making the plant susceptible to other pathogens. Managing this plant disease significantly maintains the plant's aesthetic value and overall health.
Learn More About the Brown blotch more
Leaf rot
Leaf rot Leaf rot Leaf rot
Leaf rot is a disease that mainly affects Crown of thorns, causing the plant's foliage to decay, discolor, and fall off. The disease results from various fungi and bacteria or environmental influences, potentially leading to the death of the plant if left untreated.
Learn More About the Leaf rot more
Scars
Scars Scars Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Solutions: Each source of scarring requires a different approach to help your plant recover. Protect the trunk and leaves from physical damage like scrapes. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Learn More About the Scars more
Underwatering
Underwatering Underwatering Underwatering
Leaves may wilt for a variety of reasons.
Solutions: The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with. Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock. In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.
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Flower withering
Flower withering Flower withering Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Learn More About the Flower withering more
Caterpillars
Caterpillars Caterpillars Caterpillars
Caterpillars are fleshy moth or butterfly larvae that come in an array of colors, patterns, and even hairstyles. They chew on leaves and flower petals, creating large, irregular holes.
Solutions: Even though caterpillars are diverse, they all chew on plant parts and can cause significant damage if present in large numbers. For severe cases: Apply insecticide. For an organic solution, spray plants with a Bacillus thuringiensis (Bt), which specifically affects the larval stage of moths and butterflies. Be sure to coat plants, since caterpillars need to ingest Bt for it to be effective. This will not harm other insects. Spray a chili extract. Chili seeds can be cooked in water to make a spicy spray that caterpillars don't like. Spray this mixture on the plants, but be aware it will also be spicy to humans. Introduce beneficial insects. Release beneficial insects to the garden that eat caterpillars, such as parasitic wasps. For less severe cases: Hand pick. Using gloves, pick off caterpillars on plants and dispose of them in a bucket of soapy water. Dust plants with diatomaceous earth. This powder is harmless to humans but irritates caterpillars. Therefore, it will make it difficult for caterpillars to move and eat.
Learn More About the Caterpillars more
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Brown blotch
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Brown blotch Disease on Crown of thorns?
What is Brown blotch Disease on Crown of thorns?
Brown spot is a common plant disease that can affect various plants, including Crown of thorns. It causes brown, necrotic spots on the leaves, impairing photosynthesis and making the plant susceptible to other pathogens. Managing this plant disease significantly maintains the plant's aesthetic value and overall health.
Symptom Analysis
Symptom Analysis
Crown of thorns's infected parts, primarily the leaves, exhibit scattered, irregular brownish spots. With time, these spots mature, turning a more intense brown to black. Consequentially, leaves may drop prematurely, and their loss impairs the plant's vigor.
What Causes Brown blotch Disease on Crown of thorns?
What Causes Brown blotch Disease on Crown of thorns?
1
Fungal pathogens
Brown spot is primarily triggered by the fungal pathogens Cercospora and Alternaria species.
2
Environmental conditions
High humidity and warm conditions facilitate the disease's development.
How to Treat Brown blotch Disease on Crown of thorns?
How to Treat Brown blotch Disease on Crown of thorns?
1
Non pesticide
Proper watering: Keeping Crown of thorns's leaves dry by watering at the base.

Pruning: Removing infected parts to minimize spread.

Air circulation: Providing adequate spacing in between plants for good air circulation.
2
Pesticide
Fungicide application: If the disease persists, consider applying suitable fungicides following the label instructions.

Copper sprays: These are beneficial in managing fungal diseases, as the ions disrupt the enzyme system of the fungi.
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Leaf rot
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Leaf rot Disease on Crown of thorns?
What is Leaf rot Disease on Crown of thorns?
Leaf rot is a disease that mainly affects Crown of thorns, causing the plant's foliage to decay, discolor, and fall off. The disease results from various fungi and bacteria or environmental influences, potentially leading to the death of the plant if left untreated.
Symptom Analysis
Symptom Analysis
Crown of thorns's main symptoms include discolored or brown leaves, wilted foliage, and halting growth. Advanced stages witness a mushy, rotted appearance of the leaves, which eventually fall off the plant.
What Causes Leaf rot Disease on Crown of thorns?
What Causes Leaf rot Disease on Crown of thorns?
1
Overwatering
Excessive moisture creates favourable conditions for fungi or bacteria growth.
2
Poor ventilation
Insufficient air circulation encourages the growth of fungi that cause leaf rot.
3
Pathogens
Fungal or bacterial agents such as Phytophthora and Fusarium cause this affliction.
How to Treat Leaf rot Disease on Crown of thorns?
How to Treat Leaf rot Disease on Crown of thorns?
1
Non pesticide
Proper watering: Avoid overwatering and ensure well-draining soil conditions.

Enhanced ventilation: Ensure proper air circulation to prevent fungal growth.

Infected material removal: Manually eliminate infected leaves to prevent further dispersion of the disease.
2
Pesticide
Fungicides: Use suitable fungicides to manage fungal-caused leaf rot.

Bactericides: For bacterial leaf rot, apply relevant bactericides.
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Scars
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Scars
Any light-colored markings that appear on stems but which do not enlarge or multiply are simply scars that have healed.
Symptom Analysis
Symptom Analysis
Scars form when the plant repairs wounds. They can be the result of people or pets passing by and scraping the plant. Once the underlying issue is resolved, the plant will heal but a scar may remain.
Pests and pathogens can also cause scarring. Insects may attack the plant for a meal, resulting in extensive scarring when a few invaders turn into an infestation. Diseases such as fungus and bacteria can weaken the plant, causing brown spots, mushy areas, or blisters that lead to scars.
Scars occur on stems when a leaf or bud has been lost and the plant has healed. The harder tissue is like a scab that protects a wound.
On other occasions, scars can signal problems from environmental conditions, such as overexposure to sunlight or heat. It might surprise you to know that plants can suffer from sunburn, even desert dwellers like cactus!
Solutions
Solutions
Each source of scarring requires a different approach to help your plant recover.
  1. Protect the trunk and leaves from physical damage like scrapes.
  2. If pests or disease are the cause of scarring, isolate the plant from others to avoid further spread. Some pests can be removed with organic remedies such as a soft cloth and soapy water solution or diluted isopropyl alcohol spray.
  3. Stop sunburn by moving your plant away from direct sunlight and making sure it has the water it needs.
  4. Frequent leaf or bud loss may be due to insufficient light or nutrients.
Prevention
Prevention
Preventing some sources of scarring is easier than others, but all start with careful attention to your plants once you decide to bring them home.
  1. Review specific guidelines for your plant, including soil drainage, watering, and fertilizer requirements.
  2. Inspect plants before planting and use sterile pots and fresh potting soil or media to limit transfer of fungi or bacteria.
  3. Once established, check your plants regularly for signs of scarring or the presence of pests, as it is better to catch problems as early as possible.
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Underwatering
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Underwatering
Leaves may wilt for a variety of reasons.
Overview
Overview
Underwatering plants is one of the quickest ways to kill them. This is something that most gardeners are well aware of. Unfortunately, knowing exactly how much water a plant needs can be tricky, especially considering that underwatering and overwatering present similar symptoms in plants.
Therefore, it’s important to be vigilant and attentive to each plants’ individual needs.
Symptom Analysis
Symptom Analysis
As mentioned earlier, overwatering and underwatering present similar symptoms in plants. These symptoms include poor growth, wilted leaves, defoliation, and brown leaf tips or margins. Ultimately, both underwatering and overwatering can lead to the death of a plant.
The easiest way to determine whether a plant has too much water or too little is to look at the leaves. If underwatering is the culprit, the leaves will look brown and crunchy, while if it’s overwatering, they will appear yellow or a pale green in color.
When this issue first begins, there may be no noticeable symptoms at all, particularly in hardy or drought-tolerant plants. However, they will begin to wilt once they start suffering from a lack of water. The edges of the plant’s leaves will become brown or curled. Soil pulling away from the edges of the planter is a telltale sign, or a crispy, brittle stem.
Prolonged underwatering can cause a plant’s growth to become stunted. The leaves might drop and the plant can be more susceptible to pest infestations, too.
Disease Cause
Disease Cause
Underwatering is caused by, quite simply, not watering plants often or deeply enough. There is a heightened risk of underwatering if any of these situations apply:
  • Extreme heat and dry weather (when growing outdoors)
  • Grow lights or indoor lighting that is too bright or intense for the type of plant
  • Using fast-draining growing media such as sand
Solutions
Solutions
The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with.
Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock.
In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.
Prevention
Prevention
Always check the soil before watering. If the top inch of soil feels moist, though not wet, the watering is perfect. If it’s dry, water it immediately. If it feels soggy, you avoid watering until it dries out a bit more.
Also, make sure the lighting is sufficient for the species. Plants grow faster and need more water when there is intense light or lots of heat. Being aware of these conditions and modifying them, if possible, is a good way to prevent underwatering. Many container plants are potted in soil mixtures mean to be well-draining. Adding materials that retain moisture, like compost or peat moss, can also prevent these symptoms.
Other tips to prevent underwatering include:
  • Choose pots with adequately-sized drainage holes
  • Avoid warm temperatures
  • Use large pots with additional soil (these take longer to dry out)
  • Avoid terracotta pots, which lose water quickly
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Flower withering
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Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
  • Wilted, droopy flowers
  • Petals and leaves begin to wrinkle
  • Brown papery streaks or spots appear on the petals and leaf tips
  • Flowerhead shrink in size
  • Petal color fades
  • Yellowing leaves
  • Complete death of the flower
Disease Cause
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
Solutions
Solutions
If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface.
In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well.
If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Prevention
Prevention
This is definitely one of those instances where prevention is more effective than cure. Here are some preventative measures for avoiding premature flower withering.
  • Water plants according to their needs -- either keep the soil slightly moist or allow the top inch or two to dry out before watering again.
  • Fertilize lightly on a consistent basis, depending upon the plant’s growth. Quick-growing plants and those that flower or develop fruit will need more frequent fertilizing than slow-growing plants.
  • Purchase plants that are certified disease- or pathogen-free.
  • Look for disease-resistant cultivars.
  • Isolate plants showing disease symptoms to prevent the spread to neighboring plants.
  • Practice good plant hygiene by removing any fallen plant material as soon as possible.
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Caterpillars
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Caterpillars
Caterpillars are fleshy moth or butterfly larvae that come in an array of colors, patterns, and even hairstyles. They chew on leaves and flower petals, creating large, irregular holes.
Overview
Overview
Caterpillars can cause problems for home gardeners. If not managed, these insects can defoliate a plant in just a matter of days. However, home gardeners face a challenge because these caterpillars eventually turn into beautiful butterflies and moths, which are important for pollination and the general ecosystem.
There are thousands of different species of caterpillars and many will only target certain plants. If caterpillars are posing a problem, they can be removed by hand, or gardeners can use insect-proof netting to protect their valuable plants.
Symptom Analysis
Symptom Analysis
Caterpillars are the larvae of butterflies and moths. During the warmer months, butterflies and moths that visit gardens will lay their eggs on the underside of leaves.
When the tiny eggs hatch, the young larvae emerge and start feeding on the leaves of the plant. Depending on how many larvae have hatched, they can easily defoliate the plant in a very short period of time. Caterpillars will shed their skin as they grow, around 4 or 5 times during this feeding cycle.
Symptoms of caterpillars eating plants appear as holes in the leaves. The edges of the leaves may be eaten away as well, and flowers can be affected as well.
Some are easy to see, but others need to be searched for. This is because their bodies are often camouflaged to look like part of the plant. Gardeners need to look carefully along the stems of the plant as well as under the leaves. Also, look for tiny white, yellow, or brown eggs that can be found in groups on the underside of leaves.
Once the caterpillar is fully grown, it transforms into a pupa or chrysalis. Then, after a period of time that varies according to the species, a butterfly or moth will emerge from the pupa and the cycle begins again.
Solutions
Solutions
Even though caterpillars are diverse, they all chew on plant parts and can cause significant damage if present in large numbers.
For severe cases:
  1. Apply insecticide. For an organic solution, spray plants with a Bacillus thuringiensis (Bt), which specifically affects the larval stage of moths and butterflies. Be sure to coat plants, since caterpillars need to ingest Bt for it to be effective. This will not harm other insects.
  2. Spray a chili extract. Chili seeds can be cooked in water to make a spicy spray that caterpillars don't like. Spray this mixture on the plants, but be aware it will also be spicy to humans.
  3. Introduce beneficial insects. Release beneficial insects to the garden that eat caterpillars, such as parasitic wasps.
For less severe cases:
  1. Hand pick. Using gloves, pick off caterpillars on plants and dispose of them in a bucket of soapy water.
  2. Dust plants with diatomaceous earth. This powder is harmless to humans but irritates caterpillars. Therefore, it will make it difficult for caterpillars to move and eat.
Prevention
Prevention
Prevention may require less effort than attempts to eradicate infestations that have already begun. Here are our top steps for prevention:
  1. Monitor plants. Check plants regularly for caterpillar eggs on leaves. If they do not belong to an endangered species, they should be squished.
  2. Use insect netting. Cover plants with insect netting to prevent butterflies and moths from laying eggs on plants.
  3. Apply diatomaceous earth. Apply DE to plants early in the season and reapply after rain.
  4. Encourage plant diversity. This will attract predatory insects including parasitic wasps.
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toxic

Crown of thorns and Their Toxicity

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* The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.
Highly Toxic to Humans
Although a popular houseplant, crown of thorns is highly poisonous, with ingestion of any part causing moderate toxicity. Its sap contains harmful chemicals that can result in both eye and skin irritation if not handled with caution. Contact with the eyes may cause puffing and swelling, and contact with the skin will likely lead to dermatitis. Poisoning through ingestion can cause irritation and blistering of the mouth and throat, vomiting, and abdominal/stomach pain. If the sap is ingested, it may cause temporary blindness. Poisoning most often occurs in children because of crown of thorns's bright, inviting flowers.
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Who Is Most at Risk of Plant Poisoning?
Your pets like cats and dogs can be poisoned by them as well!
1
Do not let your lovely pets eat any parts, nor contact with the sap of toxic or unknown plants;
2
It’s better to kill those growing around your house. Wear long-sleeved shirts, pants and gloves with sharp tools to dig it out completely;
3
Clean the tools with rubbing alcohol or soap and water but do not do that with bare hands;
4
Clean your hands and skin once exposed to plants with soap and water;
5
Consider using barrier creams that contain bentoquatam to prevent poison oak, ivy and sumac rashes;
6
Dump it in special trash cans in sealed garbage packages, and do not let your pets reach it;Do not let your lovely pets eat any parts, nor contact with the sap of toxic or unknown plants;
7
If you take your pets to hike with you in the wild, please don’t let them eat any plants that you don’t know;
8
Once your pets eat, touch or inhale anything from toxic plants and act abnormally, please call the doctors for help ASAP!
pets
Pets
Some pets are less likely than children to eat and touch just about everything. This is good, as a pet owner. However, you know your pet best, and it is up to you to keep them safe. There are plenty of poisonous weeds that can grow within the confines of your lawn, which might make your dogs or cats ill or worse if they eat them. Try to have an idea of what toxic plants grow in your area and keep them under control and your pets away from them.
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Common Toxic Houseplants
Common Toxic Houseplants
When it comes to decorating a house, there is nothing more refreshing than adding some beautiful houseplants. Some common house plants can also be toxic.

Aloe

aloe
Aloe is famous for its sunburn-soothing properties and its gorgeous desert design. However, many people do not realize that the latex the aloe vera plant produces can be mildly toxic to pets and children.

The latex contains a chemical compound known as saponin. Which when ingested, can cause vomiting, diarrhea, and low blood sugar. This, if left unchecked, can lead to dehydration and electrolyte imbalance. The proper response is to contact poison control or a veterinarian to know what to do in your particular circumstance if either your child or pet consumes aloe.

The latex of the plant is similar to the sap of the tree. It is inside the leaf, but sticks mainly toward the edges. If aloe gel is prepared properly it should be safe for use, but be sure to apply it only topically when treating burns.

Philodendron

Philodendron
Philodendron, also known as sweetheart vine, has become a resident at many houses and even businesses. They are glossy green and the leaves elegantly split, displaying interesting designs. Behind this beauty there is a needle-like toxin called calcium oxalate crystals.

These crystals are held within the plant and only affect you, your pets, or your loved ones if the plant tissue is broken. If ingested, the crystals can cause severe swelling, difficulty breathing, stomach pain, burning and pain. If they are accidentally caught on the skin, they can cause skin irritation.

If anyone accidentally ingests philodendron and they find it difficult to breathe or their tongue starts to swell up, it is important to seek medical attention immediately to avoid suffocation. If you have very young children or pets who have a tendency to tear at plants, keep them away from any philodendrons.

Peace Lily

Peace Lily
Peace lilies produce stunningly white flowers that bring to mind peace and serenity. This is one reason they are invited into our homes and given a place to stay. However, similar to philodendrons, the peace lily contains oxalate crystals known as raphides.

The raphides, once ingested, will cause swelling and burning sensations and can also cause skin irritation. Both pets and humans can get these symptoms so it is important to keep these plants from anyone who is likely to tear or chew it. Symptoms can become dire if the raphides cause the tongue and throat to swell to a point where the person or pet is having difficulty breathing. Seek proper medical attention if this is the case.

Snake Plant

Snake Plant
The snake plant is an interesting and popular house plant. Its stark architecture and wavy coloring has made it a fan favorite. This plant too, however, is toxic when ingested or if the sap touches your skin.

Snake plant sap will cause rashes if it comes into contact with your skin. In addition, it will cause diarrhea and vomiting when ingested. Again these symptoms are very serious and would be best avoided by keeping snake plants out of reach or by choosing a different houseplant.
Common Toxic Garden Plants
Common Toxic Garden Plants

Daffodil

Daffodil
Daffodils are a strikingly colorful flower. This can sometimes bring them much attention not from just onlooking adults but children as well. Since kids are more drawn to colorful objects, they may have a higher chance of just grabbing the flower and eating it. Adults have also been known to accidentally grab daffodil bulbs instead of onions.

Why are these mistakes so dangerous? Daffodils contain lycorine, which can induce nausea, vomiting, and diarrhea. It also contains oxalates which can cause swelling and pain. The symptoms can be worse in animals, because if your pets eat daffodils they may experience drowsiness, low blood pressure or even liver damage.

Make sure to call poison control when these symptoms set in. The vomiting and diarrhea have been known to go away after 3 hours, but it is better to be safe than sorry. Ingesting liquids to keep hydration up can be important. If the patient is having difficulty breathing, seek medical attention immediately.

Hydrangea

Hydrangea
Hydrangeas are unique, with their soft blue and pink flowers. They are a great addition to any garden, but should not be snacked on—not that you would want to. Hydrangeas can be especially nasty because they contain compounds known as glycosides. These will release hydrogen cyanide into the bloodstream when consumed. This will block your body’s ability to uptake oxygen to the cells in your body.

The way to combat this kind of poisoning is through getting IVs from the vet or doctor. It is important to contact your medical professional immediately since the symptoms can be fatal within minutes or hours.

Rhododendrons

Rhododendrons
Rhododendron, the state flower of Washington, is also toxic. The multitudinous, pink flowers can be quite dangerous. All parts of this plant are toxic, the leaves and seeds more so than the flowers. However, even the nectar of the flower is toxic and in the Mediterranean, where rhododendrons grow in more dense quantities, the honey from bees who gather rhododendron nectar can be poisonous.

Normally kids and pets do not eat enough to experience the full poisoning effect. However, just eating two leaves is enough to be considered dangerous. The grayanotoxin glycosides within the rhododendron can cause vomiting, diarrhea and irregular heartbeats. Things can get very serious when too much rhododendron is consumed and can lead to necessary medical intervention.

Start by calling poison control first if you suspect anyone has been munching on rhododendrons. The experts there will be able to help guide you through the necessary processes to cure your loved one.

Rhubarb

Rhubarb
Yummy rhubarb has a nasty side to it. While the stems are used in many recipes, including for rhubarb strawberry pie, the leaves are toxic. They contain oxalic acid which is known to blister the mouth, cause nausea, vomiting, diarrhea and kidney stones. The leaves are known to be more toxic to pets than humans, but in either case, it is important to contact poison control immediately to figure out necessary steps to cure the patient.
Common Toxic Weeds in the Yard
Common Toxic Weeds in the Yard

Bittersweet Nightshade

Bittersweet Nightshade
Nightshade is an invasive, noxious weed that is extremely poisonous. It has been found along the East and West Coast of the U.S. It makes its home in areas with disturbed soil. This could be near your garden or areas that have recently had bushes/trees put in.

These plants are dark green with purple flowers that develop into bright red berries. The whole plant is toxic and should be avoided by pets and children alike. If ingested it can cause nausea, vomiting, and diarrhea. The colorful berries are especially enticing to young children. If you see any plants that look similar to tomato or pepper plants that you did not plant in your yard, it is best to just pull them immediately.

Call poison control immediately if you think someone has fallen victim to nightshade.

Buttercups

Buttercups
Buttercups are found throughout the United States, especially in wet areas. The shiny, yellow flowers will pop up in the springtime, accompanying their dandelion friends. However, unlike dandelions, buttercups are not edible.

Buttercups will release a compound called protoanemonin. This toxin is known to cause vomiting, diarrhea, bloody stool, hypersalivation, depression, blisters, and more. These symptoms will affect both humans and animals. The sap may also cause irritation when it comes into contact with skin. These yellow flowers are dangerous and children should be observed cautiously when around them.

Foxgloves

Foxgloves
Foxgloves are beautiful plants that build towers out of vivid purple bell-shaped blossoms. They are very pretty to look at, but they contain a compound known as digoxin. This chemical is used in certain medicines to help people with certain heart conditions. However, the medicine is made by specialists, whereas someone eating foxgloves will receive unregulated amounts of the chemical.

This toxin can make you vomit and lower your heartbeat. This often causes dizziness and faintness. It is extremely important to call poison control immediately to know what to do in the case of foxglove poisoning. Some people have confused the young leaves of foxglove with borage, making adult foragers at risk as well as kids and pets.
How to Tend to or Get Rid of Toxic Plants
How to Tend to or Get Rid of Toxic Plants
Now that you know where to start with toxic plant identification, let us discuss how to either tend to the poisonous plants you decide to keep or get rid of them that plague your yard.

How to Tend to Poisonous Plants

Many plants that are toxic when ingested are also skin irritants. The philodendron is a good example of this. When the sap comes into contact with skin, it can cause a rash to form. To help protect yourself when tending to toxic plants, it is important to wear some sort of gloves.
Tend
Latex gloves may be the best solution due to their disposability. Regular gloves could potentially keep the poisonous sap on their surface. If the gloves aren’t cleaned then you could accidentally touch the irritant or pass it to someone else.

In addition you will want to plan where to keep your deadly beauties. If you have a toxic indoor plant try to keep it up high or out of reach of children and pets. This will keep accidents few and far between. Another idea is keeping your plants in areas that are usually inaccessible to children or pets. Areas such as an office, study room, or guest bedroom could be good locations. If applicable, you could also set up a terrarium for your little plant baby, making it more difficult for curious hands or paws to access.
tend2
If you plan to have outdoor plants, location will be key. You will want to put plants in an area that will be inaccessible to children, pets and even wild animals. You will probably want to avoid planting the plants in the front of your house if kids walk by on a regular basis, just to be cautious. Having the plants behind a fence will be best, but use your discretion when choosing a spot.

How to Get Rid of Poisonous Plants

plants
The easiest but possibly most controversial way to get rid of poisonous plants is by using herbicides. This can be especially easy if you own a grass lawn and use an herbicide that targets broadleaf (non-grass) species. You can find many herbicides meant for yard use by simply searching the term online. Once you have purchased the herbicide you will want to make sure to follow the label posted on the container. If you follow the instructions precisely, then everything should run smoothly for you.

If you don’t plan on using herbicides, there are a few organic methods you can use to try to get rid of toxic plants. You can manually pull the plants out of the ground. This is probably one of the most difficult methods because there is no assurance that you will get the whole plant out this way.

You can also try pouring boiling hot water or spraying white vinegar on the target plants. This may take more time than using a synthetic herbicide, but you can feel a little better about using these products.

You can also try to use wood chips to cover a certain area where you do not want anything to grow. This will not stop all the weeds, but the few that make it through can be easily picked by hand.
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Who Is Most at Risk of Plant Poisoning?
Everyone should keep the following in mind to prevent being poisoned:
1
Do not eat any parts, nor contact with the sap of toxic or unknown plants;
2
If you need to kill it, wear long-sleeved shirts, pants and gloves with sharp tools to dig it out completely;
3
Clean the tools with rubbing alcohol or soap and water but do not do that with bare hands;
4
Clean your hands and skin once exposed to plants with soap and water;
5
Consider using barrier creams that contain bentoquatam to prevent poison oak, ivy and sumac rashes;
6
Dump it in special trash cans in sealed garbage packages;
7
Wear properly when you hiking or working in the wilderness. Long pants, long sleeves, gloves, hiking shoes, etc., that protect you from being hurt by any plants;
8
Once you or your family aren’t feeling well after eating, touching or inhaling anything from toxic plants, please call your doctor for help ASAP!
Outdoor Workers
Outdoor Workers and Recreationalists
Those who enjoy the outdoors either as a hobby or as part of their work will rarely see a plant and decide to munch on it (although the scenario is not unheard of). However, they do tend to deal with moving through and brushing aside plants. These people are more at risk of being poisoned by touching toxic plants than by ingesting them.
Outdoor Workers
Foragers
Foragers
Foraging for food and medicinal plants is a desirable skill among people who want to feel at one with the land. This hobby can be very useful and enjoyable, but if done wrong , it can lead to disastrous effects. People who forage are picking and grabbing plants with the full intention of using those plants, most of the time to ingest them.
Foragers
Children
Children
While outdoor workers are more likely to touch poison and foragers are more likely to ingest poison, children can easily do both. These bundles of joy just love to run around and explore the world. They enjoy touching things and occasionally shoving random stuff in their mouth; this is a terrible combination with toxic plants in the mix.
If you let your children run about, it is important to know what are the local toxic plants that they could accidentally get into. Try to educate the children and steer them away from where the toxic plants are located.
Children
Common Toxic Houseplants
Common Toxic Houseplants
When it comes to decorating a house, there is nothing more refreshing than adding some beautiful houseplants. Some common house plants can also be toxic.

Aloe

aloe
Aloe is famous for its sunburn-soothing properties and its gorgeous desert design. However, many people do not realize that the latex the aloe vera plant produces can be mildly toxic to pets and children.

The latex contains a chemical compound known as saponin. Which when ingested, can cause vomiting, diarrhea, and low blood sugar. This, if left unchecked, can lead to dehydration and electrolyte imbalance. The proper response is to contact poison control or a veterinarian to know what to do in your particular circumstance if either your child or pet consumes aloe.

The latex of the plant is similar to the sap of the tree. It is inside the leaf, but sticks mainly toward the edges. If aloe gel is prepared properly it should be safe for use, but be sure to apply it only topically when treating burns.

Philodendron

Philodendron
Philodendron, also known as sweetheart vine, has become a resident at many houses and even businesses. They are glossy green and the leaves elegantly split, displaying interesting designs. Behind this beauty there is a needle-like toxin called calcium oxalate crystals.

These crystals are held within the plant and only affect you, your pets, or your loved ones if the plant tissue is broken. If ingested, the crystals can cause severe swelling, difficulty breathing, stomach pain, burning and pain. If they are accidentally caught on the skin, they can cause skin irritation.

If anyone accidentally ingests philodendron and they find it difficult to breathe or their tongue starts to swell up, it is important to seek medical attention immediately to avoid suffocation. If you have very young children or pets who have a tendency to tear at plants, keep them away from any philodendrons.

Peace Lily

Peace Lily
Peace lilies produce stunningly white flowers that bring to mind peace and serenity. This is one reason they are invited into our homes and given a place to stay. However, similar to philodendrons, the peace lily contains oxalate crystals known as raphides.

The raphides, once ingested, will cause swelling and burning sensations and can also cause skin irritation. Both pets and humans can get these symptoms so it is important to keep these plants from anyone who is likely to tear or chew it. Symptoms can become dire if the raphides cause the tongue and throat to swell to a point where the person or pet is having difficulty breathing. Seek proper medical attention if this is the case.

Snake Plant

Snake Plant
The snake plant is an interesting and popular house plant. Its stark architecture and wavy coloring has made it a fan favorite. This plant too, however, is toxic when ingested or if the sap touches your skin.

Snake plant sap will cause rashes if it comes into contact with your skin. In addition, it will cause diarrhea and vomiting when ingested. Again these symptoms are very serious and would be best avoided by keeping snake plants out of reach or by choosing a different houseplant.
Common Toxic Garden Plants
Common Toxic Garden Plants

Daffodil

Daffodil
Daffodils are a strikingly colorful flower. This can sometimes bring them much attention not from just onlooking adults but children as well. Since kids are more drawn to colorful objects, they may have a higher chance of just grabbing the flower and eating it. Adults have also been known to accidentally grab daffodil bulbs instead of onions.

Why are these mistakes so dangerous? Daffodils contain lycorine, which can induce nausea, vomiting, and diarrhea. It also contains oxalates which can cause swelling and pain. The symptoms can be worse in animals, because if your pets eat daffodils they may experience drowsiness, low blood pressure or even liver damage.

Make sure to call poison control when these symptoms set in. The vomiting and diarrhea have been known to go away after 3 hours, but it is better to be safe than sorry. Ingesting liquids to keep hydration up can be important. If the patient is having difficulty breathing, seek medical attention immediately.

Hydrangea

Hydrangea
Hydrangeas are unique, with their soft blue and pink flowers. They are a great addition to any garden, but should not be snacked on—not that you would want to. Hydrangeas can be especially nasty because they contain compounds known as glycosides. These will release hydrogen cyanide into the bloodstream when consumed. This will block your body’s ability to uptake oxygen to the cells in your body.

The way to combat this kind of poisoning is through getting IVs from the vet or doctor. It is important to contact your medical professional immediately since the symptoms can be fatal within minutes or hours.

Rhododendrons

Rhododendrons
Rhododendron, the state flower of Washington, is also toxic. The multitudinous, pink flowers can be quite dangerous. All parts of this plant are toxic, the leaves and seeds more so than the flowers. However, even the nectar of the flower is toxic and in the Mediterranean, where rhododendrons grow in more dense quantities, the honey from bees who gather rhododendron nectar can be poisonous.

Normally kids and pets do not eat enough to experience the full poisoning effect. However, just eating two leaves is enough to be considered dangerous. The grayanotoxin glycosides within the rhododendron can cause vomiting, diarrhea and irregular heartbeats. Things can get very serious when too much rhododendron is consumed and can lead to necessary medical intervention.

Start by calling poison control first if you suspect anyone has been munching on rhododendrons. The experts there will be able to help guide you through the necessary processes to cure your loved one.

Rhubarb

Rhubarb
Yummy rhubarb has a nasty side to it. While the stems are used in many recipes, including for rhubarb strawberry pie, the leaves are toxic. They contain oxalic acid which is known to blister the mouth, cause nausea, vomiting, diarrhea and kidney stones. The leaves are known to be more toxic to pets than humans, but in either case, it is important to contact poison control immediately to figure out necessary steps to cure the patient.
Common Toxic Weeds in the Yard
Common Toxic Weeds in the Yard

Bittersweet Nightshade

Bittersweet Nightshade
Nightshade is an invasive, noxious weed that is extremely poisonous. It has been found along the East and West Coast of the U.S. It makes its home in areas with disturbed soil. This could be near your garden or areas that have recently had bushes/trees put in.

These plants are dark green with purple flowers that develop into bright red berries. The whole plant is toxic and should be avoided by pets and children alike. If ingested it can cause nausea, vomiting, and diarrhea. The colorful berries are especially enticing to young children. If you see any plants that look similar to tomato or pepper plants that you did not plant in your yard, it is best to just pull them immediately.

Call poison control immediately if you think someone has fallen victim to nightshade.

Buttercups

Buttercups
Buttercups are found throughout the United States, especially in wet areas. The shiny, yellow flowers will pop up in the springtime, accompanying their dandelion friends. However, unlike dandelions, buttercups are not edible.

Buttercups will release a compound called protoanemonin. This toxin is known to cause vomiting, diarrhea, bloody stool, hypersalivation, depression, blisters, and more. These symptoms will affect both humans and animals. The sap may also cause irritation when it comes into contact with skin. These yellow flowers are dangerous and children should be observed cautiously when around them.

Foxgloves

Foxgloves
Foxgloves are beautiful plants that build towers out of vivid purple bell-shaped blossoms. They are very pretty to look at, but they contain a compound known as digoxin. This chemical is used in certain medicines to help people with certain heart conditions. However, the medicine is made by specialists, whereas someone eating foxgloves will receive unregulated amounts of the chemical.

This toxin can make you vomit and lower your heartbeat. This often causes dizziness and faintness. It is extremely important to call poison control immediately to know what to do in the case of foxglove poisoning. Some people have confused the young leaves of foxglove with borage, making adult foragers at risk as well as kids and pets.
How to Tend to or Get Rid of Toxic Plants
How to Tend to or Get Rid of Toxic Plants
Now that you know where to start with toxic plant identification, let us discuss how to either tend to the poisonous plants you decide to keep or get rid of them that plague your yard.

How to Tend to Poisonous Plants

Many plants that are toxic when ingested are also skin irritants. The philodendron is a good example of this. When the sap comes into contact with skin, it can cause a rash to form. To help protect yourself when tending to toxic plants, it is important to wear some sort of gloves.
Tend
Latex gloves may be the best solution due to their disposability. Regular gloves could potentially keep the poisonous sap on their surface. If the gloves aren’t cleaned then you could accidentally touch the irritant or pass it to someone else.

In addition you will want to plan where to keep your deadly beauties. If you have a toxic indoor plant try to keep it up high or out of reach of children and pets. This will keep accidents few and far between. Another idea is keeping your plants in areas that are usually inaccessible to children or pets. Areas such as an office, study room, or guest bedroom could be good locations. If applicable, you could also set up a terrarium for your little plant baby, making it more difficult for curious hands or paws to access.
tend2
If you plan to have outdoor plants, location will be key. You will want to put plants in an area that will be inaccessible to children, pets and even wild animals. You will probably want to avoid planting the plants in the front of your house if kids walk by on a regular basis, just to be cautious. Having the plants behind a fence will be best, but use your discretion when choosing a spot.

How to Get Rid of Poisonous Plants

plants
The easiest but possibly most controversial way to get rid of poisonous plants is by using herbicides. This can be especially easy if you own a grass lawn and use an herbicide that targets broadleaf (non-grass) species. You can find many herbicides meant for yard use by simply searching the term online. Once you have purchased the herbicide you will want to make sure to follow the label posted on the container. If you follow the instructions precisely, then everything should run smoothly for you.

If you don’t plan on using herbicides, there are a few organic methods you can use to try to get rid of toxic plants. You can manually pull the plants out of the ground. This is probably one of the most difficult methods because there is no assurance that you will get the whole plant out this way.

You can also try pouring boiling hot water or spraying white vinegar on the target plants. This may take more time than using a synthetic herbicide, but you can feel a little better about using these products.

You can also try to use wood chips to cover a certain area where you do not want anything to grow. This will not stop all the weeds, but the few that make it through can be easily picked by hand.
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Weed Control About Crown of thorns

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Weeds
Crown of thorns is a flower-viewing plant that always attracts people's attention. But this beautiful plant has extremely high toxicity and spikes, which can easily hurt people who come into contact with it.
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Distribution of Crown of thorns

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Habitat of Crown of thorns

Variety of bush, Forest habitats
Northern Hemisphere
South Hemisphere

Distribution Map of Crown of thorns

Crown of thorns is native to Madagascar, where its native habitat includes dry thickets and rocky areas. It has been introduced in India, Southeast Asia, Bolivia, Central America, and Florida. It is widely cultivated as an ornamental or houseplant in warm climates. Crown of thorns is listed as invasive in Anguilla, and its dense thickets sometimes become invasive in native countries.
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Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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Plants Related to Crown of thorns

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Crown Of Thorns Watering Instructions
Crown of thorns originates from the arid plains and rainforest margins of Madagascar, embodying resilience in typically scarce rainfall conditions. This suggests a low requirement for watering, reflected in its knack for water storage within its spiky stems. Overwatering can replicate a rarely occurring, detrimental flood, hence it prefers sporadic watering, with thorough drying between to prevent root rot.
When Should I Water My Crown Of Thorns?
Introduction
Proper and timely watering plays a crucial role in maintaining the overall health and development of the crown of thorns. It contributes to its optimal growth, vibrant flower production, and resistance against diseases. Therefore, understanding the appropriate signals indicating when the plant should be watered is essential.
Soil Dryness
A clear sign of when crown of thorns needs water is the dryness of the soil. This can be checked by touching the soil around the plant base. If the top 1 to 2 inches of soil is dry to the touch, this means the plant most likely requires watering.
Leaf Condition
The condition of the leaves of crown of thorns can also be a reliable indicator for watering necessities. If the leaves appear wilted, lackluster, or begin to lose their vibrant color tending to fade or yellow, these are indicative of the plant being under-watered.
Flower Production
Crown of thorns requires watering during its pre-flowering or bud formation stage. A lack of water during this critical period may result in bud drop, preventing the plant from flowering fully.
Temperature and Sunlight Exposure
Crown of thorns has a high water requirement during warm temperatures and high sunlight exposure periods. Therefore, one must ensure to observe proper watering if these conditions are persistent.
Early Watering Risks
Watering crown of thorns too early, when the soil is still moist, could risk root rot, fungus infestation, and other root diseases due to over-watering.
Late Watering Risks
Watering crown of thorns too late, when it has been excessively dry for an extended period, could risk temporary wilting and might stunt the plant's growth. In extreme conditions, it can lead to plant death due to dehydration.
Conclusion
Understanding these signs is critical to effectively manage the watering schedule for the crown of thorns. Proper water management not only encourages its growth and flowering but also prolongs its lifespan and maintains plant health.
How Should I Water My Crown Of Thorns?
Watering Sensitivity
Crown of thorns is a succulent plant and therefore it has a heightened sensitivity to overwatering. This plant prefers to dry out moderately between waterings, as it stores water in its fleshy stems and leaves. Overwatering can lead to root rot and other illnesses.
Suitable Watering Techniques
The best method for watering crown of thorns is deep watering. You should water crown of thorns thoroughly until the water drains out the bottom of the pot, then let it dry out before the next watering. Bottom watering, where you fill the tray beneath the pot and allow the water to be absorbed upwards, can also be beneficial for this plant, as it encourages the roots to grow deeper and stronger. Avoid misting crown of thorns as it doesn't require a high humidity environment.
Beneficial Equipment
A moisture meter can be incredibly beneficial for taking care of crown of thorns. As a plant that prefers drying out between waterings, it's important to measure the moisture in the soil instead of relying solely on a watering schedule. A watering can with a thin spout is also beneficial, as it allows for precision watering at the base of the plant.
Specific Watering Focus Areas
When watering crown of thorns, focus on the soil rather than the foliage. It is more drought-tolerant and does not need moisture on its leaves or stems. Additionally, due to the risk of overwatering, you should focus on keeping the water away from the base of the plant as stagnant water can cause rotting.
Avoidance Areas During Watering
Avoid soaking the foliage and stem of crown of thorns when watering. Also, ensure that there's no water sitting in the saucer beneath the pot for an extended period of time as this can promote root rot.
Special Watering Tips
Crown of thorns has a far lesser water requirement during winter months and therefore the watering technique needs to be more careful. Also, watering should ideally be done during the day time when the temperature is warmer and evaporation happens at a rapid rate.
How Much Water Does Crown Of Thorns Really Need?
Natural Habitat Hydration Needs
Crown of thorns is native to Madagascar, characterized by semi-arid conditions with irregular rainfall. As a result, this plant has adapted to survive periods of dryness, indicating that crown of thorns is drought-tolerant and doesn't require frequent watering.
Optimal Water Quantity
Crown of thorns's water requirements depend on various factors such as the pot size, root depth, and plant size. For a plant growing in a 10-inch pot with relatively deep roots, about two cups of water (16 ounces or 500ml) every fortnight should be sufficient. The aim is to ensure the water reaches the bottom of the pot to hydrate the long, thirsty roots thoroughly. Larger plants may require more water, but the key is to water deeply and infrequently.
Watering Conditions
Crown of thorns prefers well-drained soil conditions, similar to its natural habitat. After watering, the top inch of the soil should be left dry before the next watering to prevent waterlogging and root rot. Signs of proper watering include vibrant, firm leaves, while signs of under-watering are wilting or dry, shriveled leaves. Over-watered crown of thorns may exhibit yellowing of leaves, rotting stalks, or a musty smell.
Implications of Improper Watering
Over-watering can lead to root rot, fungal infections, and may eventually kill crown of thorns. Conversely, consistent under-watering may cause crown of thorns's leaves to shrivel and fall, and the plant may enter a dormant state to conserve resources. Recovery from both conditions can be problematic, so maintaining the right watering balance is critical.
How Often Should I Water Crown Of Thorns?
Every 3 weeks
Watering Frequency
Smart Seasonal Watering
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Just like people, each plant has its own preferences and needs. Devote time to understanding your plants so you can nurture them properly. Observe your plants attentively, learning from their growth patterns, and becoming more in tune with their needs as you grow together. Keep a watchful eye on new plants and seedlings, as they are sensitive to both overwatering and underwatering. Shower them with gentle love and attention, fostering their growth and strength. Let the rhythm of your local climate guide your watering habits, adapting your schedule to the changing weather and the needs of your plants.
What Kind of Water is Best for Crown Of Thorns?
Water Type Guide for crown of thorns
Water Sensitivity: Moderate - crown of thorns prefers well-draining soil and should not be overly saturated with water.
Water Types
Distilled Water: Best suited for crown of thorns as it is free of impurities and minerals that can harm the plant. Rainwater: A natural and balanced water source for crown of thorns, but make sure to collect it away from pollution sources. Filtered Water: Can be used as an alternative to rainwater, as long as it removes harmful contaminants. Tap Water: Can be used for crown of thorns if no other water sources are available, but should be treated to remove chlorine and other harmful elements.
Chlorine Sensitivity
High - crown of thorns is sensitive to chlorine in tap water, which can cause leaf burn and stress to the plant.
Water Treatments
Dechlorination: It is recommended to let tap water sit out for at least 24 hours before using it on crown of thorns. This allows the chlorine to evaporate and makes it safer for the plant. Filtration: Using a water filter can help remove chlorine and other contaminants from tap water, making it suitable for crown of thorns.
Water Temperature Preferences
Moderate - crown of thorns generally prefers water at room temperature (around 68-72°F or 20-22°C). Avoid using water that is too cold or too hot, as extreme temperatures can shock the plant.
How Do Crown Of Thorns's Watering Needs Change with the Seasons?
How to Water crown of thorns in Spring?
During spring, crown of thorns returns to its active growth phase, shedding off its winter dormancy. It is crucial to gradually increase water intake as temperatures rise and daylight extends. Due to spring's mild weather and frequent rainfall, ensure the soil dries out between waterings to prevent root rot. Monitor your crown of thorns closely during this transition period, ensuring it is not displaying signs of over-watering such as yellowing leaves.
How to Water crown of thorns in Summer?
Crown of thorns thrives in the heat of summer, but this season can also present challenges. With increased sunlight and hotter conditions, crown of thorns may be prone to faster soil dry-out. In summer, consistency is key鈥?aim to keep the soil moderately moist, while ensuring the plant does not become waterlogged. During particularly hot spells, you may need to increase watering frequency, balancing the plants need for hydration with its intolerance to soil saturation.
How to Water crown of thorns in Autumn?
As autumn sets in and daylight reduces, crown of thorns prepares for a period of rest or dormancy. As growth slows, reduce the frequency of watering and let the top of the soil dry out before the next watering. Make a point to observe your plant closely for any signs of stress due to changes in temperature or light levels. Additionally, reducing water even more for plants kept indoors as indoor heating can make the air particularly dry.
How to Water crown of thorns in Winter?
Crown of thorns enters a rest period during winter. In response to shorter daylight hours and colder temperatures, its water intake needs decrease significantly. It is crucial to let the soil dry out completely between waterings in this season to avoid root damage. Remember, over-watering during this season can lead to deadly diseases such as root rot. Understand your crown of thorns's reduced watering needs in this season, watering sparingly and only when necessary.
What Expert Tips Can Enhance Crown Of Thorns Watering Routine?
Watering Tool:
Using a narrow watering can or a drip irrigation system can help deliver water directly to the base of the plant without wetting the foliage or flowers of crown of thorns, reducing the risk of fungal diseases.
Watering Schedule:
Establish a consistent watering schedule for crown of thorns. Water deeply, allowing the water to penetrate the root zone, and then allow the top few inches of soil to dry out before the next watering. This plant prefers its soil to be mostly dry before the next watering.
Assessing Soil Moisture:
Avoid relying solely on the surface moisture of the soil. Gently stick your finger an inch or two below the surface to check for moisture. If it feels slightly dry, it may be time to water.
Signs of Thirst:
Crown of thorns will slightly droop its leaves when it needs water, but it's important not to interpret this as a sign of severe dehydration. Wait until the soil dries out before watering, and the plant will recover.
Signs of Over-watering:
Yellowing or drooping leaves, root rot, or a foul odor can indicate over-watering. If crown of thorns shows these signs, reduce watering frequency and ensure the pot has proper drainage.
Watering During Heatwaves:
During heatwaves, crown of thorns may require additional watering to maintain its water needs. Check the top few inches of soil more frequently and increase watering if it becomes dry.
Watering During Extended Rain:
If crown of thorns is exposed to prolonged rainfall, consider moving it to a covered area or provide extra drainage to prevent waterlogged soil and potential root rot.
Watering During Stressful Periods:
During periods of stress, such as moving crown of thorns to a new pot or adjusting to a different environment, be mindful not to over-water. Allow the plant to settle in before resuming a regular watering routine.
Considering Hydroponics? How to Manage a Water-Grown Crown Of Thorns?
Overview of Hydroponics
Crown of thorns is a plant that can be successfully grown using hydroponics, which is a method of growing plants without soil. This method provides better control over nutrient levels, water availability, and oxygen supply, leading to improved plant growth and health.
Suitable Hydroponic System
The nutrient film technique (NFT) is the most suitable hydroponic system for growing crown of thorns. In NFT, a shallow stream of nutrient solution flows over the roots, providing them with a constant supply of nutrients and oxygen. This system is ideal for crown of thorns as it allows the roots to access the necessary nutrients without becoming waterlogged.
Nutrient Solution Requirements
For optimal growth, crown of thorns requires a balanced nutrient solution with a pH of 5.8-6.2. The nutrient solution should contain macronutrients such as nitrogen, phosphorus, and potassium, as well as micronutrients like iron, manganese, and zinc. It is important to regularly monitor and adjust the nutrient concentrations to prevent nutrient imbalances.
Challenges and Common Issues
When growing crown of thorns hydroponically, root rot can be a common issue. To prevent this, it is crucial to maintain proper oxygen levels in the root zone by ensuring adequate aeration. Nutrient imbalances can also occur, leading to yellowing or wilting of leaves. Regular testing of the nutrient solution and adjusting the concentrations accordingly can help prevent these imbalances. Additionally, crown of thorns requires sufficient light for photosynthesis. Providing adequate light intensity and duration is essential for healthy growth.
Monitoring crown of thorns's Health
In a hydroponic setup, crown of thorns's health can be monitored by observing the color and condition of its leaves. If the leaves turn yellow or brown, it may indicate a nutrient deficiency or excess. Wilting, stunted growth, or root discoloration are signs of root rot. It is important to address these issues promptly to maintain the plant's health.
Adjusting the Hydroponic Environment
As crown of thorns progresses through different growth stages, adjustments to the hydroponic environment may be required. For instance, during the vegetative stage, crown of thorns benefits from higher nitrogen levels, while during the flowering stage, a lower nitrogen concentration and higher phosphorus concentration may be necessary. It is also important to adjust lighting and temperature conditions based on the plant's needs.
Important Symptoms
Overwatering Symptoms of Crown of thorns
Overwatering can easily lead to disease symptoms in Crown of thorns, as it has evolved mechanisms to survive drought conditions. For instance, the plant stores water in its tissues, closes its stomata, and reduces water loss. Symptoms of overwatering include yellowing leaves, brown or black spots, leaf rot...
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Brown or black spots
Excessive watering can damage the plant's root system, making it vulnerable to fungal infections. The plant may develop dark brown to black spots that spread upwards from the lower leaves which are usually the first to be affected.
Leaf rot
Overwatering can cause the leaves to become waterlogged, leading to rotting when the environment is humid.
Soft or mushy stems
Excess water can cause stems to become soft and mushy, as the cells become waterlogged and lose their structural integrity.
Root rot
Excess water in the soil can lead to the growth of harmful fungi and bacteria, causing the roots to rot and eventually kill the plant.
Increased susceptibility diseases
Overwatering plants may become more susceptible and diseases as their overall health declines, weakening their natural defenses.
Solutions
1. Adjust watering frequency based on seasons and soil dryness. Wait for soil to dry before watering.2. Increase soil aeration by loosening surface and gently stirring with a wooden stick or chopstick.3. Optimize environment with good ventilation and warmth to enhance water evaporation and prevent overwatering.
Underwatering Symptoms of Crown of thorns
For Crown of thorns, it is not prone to experiencing plant health issues due to lack of watering. However, it is possible to suffer from dehydration if watering is consistently forgotten for an extended period. Symptoms of dehydration include wilting, yellowing leaves, root damage...
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Wilting
Due to the dry soil and insufficient water absorption by the roots, the leaves of the plant will appear limp, droopy, and lose vitality.
Yellowing leaves
The leaves may begin to yellow or develop dry tips as a result of water stress and reduced nutrient uptake.
Root damage
Prolonged underwatering can cause root damage, making it difficult for the plant to absorb water even when it is available.
Loss of turgor pressure
When plants are underwatered, their cells lose water, causing a loss of turgor pressure. This can result in the plant appearing limp or deflated.
Slow growth
The plant may exhibit delayed development or slow growth due to not receiving enough water to support its growth.
Solutions
1. Thoroughly saturate soil with slow ring watering to ensure uniform and sufficient moisture for plants. 2. Increase air humidity with water trays or misting to slow leaf water evaporation. 3. Watering according to the recommended frequency.Adjust watering frequency based on seasons and soil dryness.
Watering Troubleshooting for Crown Of Thorns
Why are the leaves of my crown of thorns turning yellow?
Yellowing leaves can be a sign of overwatering. Crown of thorns is a succulent that prefers infrequent watering and a well-draining soil. Refrain from watering unless the top layer of soil feels completely dry to the touch, usually every 1-2 weeks. If overwatering continues, the plant could develop root rot.
Why is my crown of thorns wilting despite consistent watering?
This could be due to underwatering or soggy soil. Check that your plant pot has sufficient drainage and the soil is drying out between waterings. If your crown of thorns is wilting and the soil is wet, you may be overwatering. Allow the soil to dry completely before watering again.
What should I do if my crown of thorns is showing signs of root rot?
Root rot is often a result of excessive watering. If you notice your crown of thorns has soft, black roots, it has developed root rot. To manage this, remove the plant from its pot, trim away the rotted roots and repot using a fresh, well-draining soil mix. Reducing the watering frequency should help prevent this problem in the future.
Should I adjust my watering routine for my crown of thorns during different seasons?
Yes, crown of thorns needs less water during colder months. While you may water it once a week in the summer, reduce watering frequency to around once every two weeks or more during the winter. The goal is to keep the plant slightly dry but not completely dehydrated.
My crown of thorns leaves are curling. What might be causing this?
Curling leaves can be a sign of too much water or a lack of water. Check the soil's moisture levels before you water your crown of thorns. If the soil is moist or wet, wait for it to dry out before watering again. If the soil is dry, give the plant a good watering, ensuring the water drains well to prevent any water-logging.
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Lighting
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Requirements
Full sun
Ideal
Above 6 hours sunlight
Partial sun
Tolerance
About 3-6 hours sunlight
Watch how sunlight gracefully moves through your garden, and choose spots that provide the perfect balance of light and shade for your plants, ensuring their happiness.
Essentials
Crown of thorns thrives under an abundant exposure to sunlight, suited to areas that receive ample, yet not excessively scorching sun rays throughout the day. Originating from sun-soaked habitats, it can also adapt to conditions where light intensity is somewhat diminished. However, either too little or too much sunlight may adversely affect its growth.
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Artificial lighting
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
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Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
1. Choose the right type of artificial light: LED lights are a popular choice for indoor plant lighting because they can be customized to provide the specific wavelengths of light that your plants need.
Full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft.
2. Determine the appropriate distance: Place the light source 12-36 inches above the plant to mimic natural sunlight.
3. Determine the duration: Mimic the length of natural daylight hours for your plant species. most plants need 8-12 hours of light per day.
Important Symptoms
Symptoms of Insufficient Light in %s
Crown of thorns is a beloved choice for indoor gardening, and they require strong light to thrive. However, when placed in rooms with suboptimal lighting, they may develop symptoms of light deficiency.
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Faster leaf drop
When plants are exposed to low light conditions, they tend to shed older leaves early to conserve resources. Within a limited time, these resources can be utilized to grow new leaves until the plant's energy reserves are depleted.
Leggy or sparse growth
The spaces between leaves or stems of your crown of thorns may become longer, resulting in a thin and stretched-out appearance. This can make the plant look sparse and weak, and it may easily break or lean due to its own weight.
Impact on flowering and fruiting
Your plant may not show obvious abnormalities due to insufficient sunlight, but it can have adverse effects on future flowering and fruiting.
Solutions
1. To ensure optimal growth, gradually move plants to a sunnier location each week, until they receive at least 6 hours of direct sunlight daily. Use a south-facing window and keep curtains open during the day for maximum sunlight exposure and nutrient accumulation.2. To provide additional light for your plant, consider using artificial light if it's large or not easily movable. Keep a desk or ceiling lamp on for at least 8 hours daily, or invest in professional plant grow lights for ample light.
Symptoms of Excessive light in %s
Crown of thorns require strong light to thrive, and some are remarkably resilient to sun exposure, rarely suffering from sunburn.
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Chlorosis
Chlorosis is a condition where the plant's leaves lose their green color and turn yellow. This is due to the breakdown of chlorophyll from excessive sunlight, which negatively affects the plant's ability to photosynthesize.
Sunscald
Sunscald occurs when the plant's leaves or stems are damaged by intense sunlight exposure. It appears as pale, bleached, or necrotic areas on the plant tissue and can reduce the plant's overall health.
Leaf Curling
Leaf curling is a symptom where leaves curl or twist under extreme sunlight conditions. This is a defense mechanism used by the plant to reduce its surface area exposed to sunlight, minimizing water loss and damage.
Wilting
Wilting occurs when a plant loses turgor pressure and its leaves and stems begin to droop. Overexposure to sunlight can cause wilting by increasing the plant's water loss through transpiration, making it difficult for the plant to maintain adequate hydration.
Leaf Scorching
Leaf scorching is a symptom characterized by the appearance of brown, dry, and crispy edges or patches on leaves due to excessive sunlight. This can lead to a reduction in photosynthetic capacity and overall plant health.
Solutions
1. Move your plant to the optimal position where it can receive abundant sunlight but also have some shade. An east-facing window is an ideal choice as the morning sunlight is gentler. This way, your plant can enjoy ample sunlight while reducing the risk of sunburn.2. It is recommended to trim off any completely dehydrated or withered parts of the plant.
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Temperature
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Tolerable
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Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
The crown of thorns plant is native to tropical and subtropical regions, where the average temperature range is around 20 to 38 ℃ (68 to 100.4 ℉). The plant prefers warm temperatures and does not tolerate cold temperatures well. In colder seasons, it is recommended to keep the temperature between 18 to 24 ℃ (64.4 to 75.2 ℉) to help the plant adjust.
Regional wintering strategies
Crown of thorns is a heat-loving plant that gradually stops growing and enters a dormant state during the winter. When the outdoor temperature drops below {Tolerable_growing_temperature_min}, it should be moved indoors for cultivation. Choose a location near a south-facing window to provide as much sunlight as possible. If there is insufficient natural light, supplemental lighting can be used. When the temperature falls below {Suitable_growth_temperature_min}, the plant's growth slows down, and watering should be reduced or stopped to prevent root rot. For Crown of thorns grown outdoors, watering should be completely halted during low temperatures. If feasible, you can set up a temporary greenhouse for insulation or use materials such as plastic film or fabric to wrap the plant during cold temperatures.
Important Symptoms
Symptoms of Low Temperature in Crown of thorns
Crown of thorns thrives in high temperatures and is not tolerant of low temperatures. It grows best when the temperature is above {Suitable_growth_temperature_min}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, the plant may become weak, wilt, and be prone to root rot. In cases of mild frost damage, there may not be any initial symptoms, but after a week, the plant will gradually wither.
Solutions
Trim off the frostbitten areas, paying attention to whether the roots have rotted. If the roots have rotted, they need to be cut off, and the plant can be propagated through cuttings. Immediately move indoors to a warm environment and place the plant near a south-facing window to ensure ample sunlight. If there is insufficient light, you can use supplemental lighting.
Symptoms of High Temperature in Crown of thorns
During summer, Crown of thorns should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the plant's growth will cease, it will experience water loss, wilting, and becomes more susceptible to sunburn.
Solutions
Remove the sunburned and rotten parts. Shield the plant from afternoon sunlight until it recovers and starts growing again. For plants with root rot, stop watering until new roots begin to emerge.
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Toxic
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The Toxicity of Crown of thorns
Highly Toxic to Humans
Human
All Parts
Toxic parts
Eaten
Effect methods
How to identify Crown Of Thorns
* The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.
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