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Old man cactus
Cephalocereus senilis
Also known as : Old man of Mexico
Old man cactus (Cephalocereus senilis) is a cactus native to eastern Mexico. Old man cactus is widely cultivated in gardens and as a houseplant, resulting in dwindling numbers of old man cactus that grow in the wild. This species is popular due to its woolly appearance. Old man cactus grows best in well-drained soil and bright sunlight, which cause the hairlike fibers to grow.
Hardiness Zones
9 to 12
Care Guide for Old man cactus
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Watering Care
During the active growing season between spring and fall, the Old man cactus should be watered regularly in well-draining soil. The top layer of soil should be allowed to dry out completely in between waterings. During the dormant winter season, regular waterings are not required for optimal growth.
Fertilizing Care
The old man cactus should be fertilized using commercial fertilizer formulated for cacti. Fertilizer should be applied during the early spring season. Fertilization can help achieve optimal bloom size for this species. Cactus food fertilizer can optionally be applied once or twice during the summer as well.
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Old man cactus
Water
Every 3 weeks
Hardiness Zones
9 to 12
Planting Time
Spring
Questions About Old man cactus
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Watering 
Sunlight 
Temperature 
Fertilizing What should I do if I water my Old man cactus too much or too little?
Underwatered Old man cactus
Old man cactus 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 Old man cactus looking thirsty or with some leaf damage from lack of watering.
It is very easy to identify an underwatered Old man cactus. The leaves will look shriveled, dry, and flat. Some may have dried up completely, turned brown and crispy, or dropped off the plant, starting with the lower leaves and moving upward as the dry conditions continue. And of course, the soil will be completely dried out.
If your Old man cactus 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. If there are dried out leaves still attached, go ahead and pluck them off to make room for new growth.
Overwatered Old man cactus
Overwatering is dangerous to Old man cactus 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 leaves that may even burst open from being over-full with water. If the problem continues without being treated, leaves 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 Old man cactus, 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 leaves and try to use these to propagate a new Old man cactus. Luckily, this plant is easy to propagate even from a single leaf. 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 Old man cactus 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 Old man cactus?
There’s not a hard-and-fast rule for how often to water Old man cactus. 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 Old man cactus 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 Old man cactus?
There are several environmental conditions that will affect how your Old man cactus 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 Old man cactus 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 Old man cactus has shallow root systems.
Old man cactus 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 Old man cactus 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 Old man cactus 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 Old man cactus 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 Old man cactus?
The best way to water Old man cactus 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 Old man cactus 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 the Old man cactus, 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 Old man cactus 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 Old man cactus.
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Key Facts About Old man cactus
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Attributes of Old man cactus
Lifespan
Perennial
Plant Type
Succulent, Shrub
Planting Time
Spring
Bloom Time
Summer
Harvest Time
Summer
Plant Height
5 m to 15 m
Spread
15 cm to 30 cm
Leaf Color
Yellow
White
Flower Size
5 cm to 8 cm
Flower Color
Pink
Yellow
Stem Color
Pink
Dormancy
Winter dormancy
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
Symbolism
Maternal love and care
Usages
Garden Use
Old man cactus is an excellent choice for growing in cactus gardens, rock gardens, and xeriscapes. However, this tall cactus also thrives when grown outdoors in pots on terraces and balconies. The plant’s surface becomes covered in an intriguing dense web of hair-like growth that also makes this cold-tolerate plant an exciting specimen plant in gardens with plenty of sunlight.
Scientific Classification of Old man cactus
Phylum
Vascular plants
Class
Dicotyledons
Order
Pinks, cacti, and allies
Family
Cactuses
Genus
Cephalocereus
Species
Old man cactus
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Common Pests & Diseases About Old man cactus
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Common issues for Old man cactus based on 10 million real cases
Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Solutions: The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method. Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly. Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems. Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species. Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil. Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Stem rot
Bacterial infection can cause the stems to become soft and rotten.
Solutions: If the plant is only infected a little, it can sometimes be saved. This mainly applies to houseplants that are grown in pots. Here's what to do. Remove the plant from the pot and gently shake off as much soil as possible. Using pruning tools that have been disinfected, remove any diseased foliage and roots. Be sure the new pot has good drainage holes and wash it with one part bleach and nine parts water to ensure that it is completely clean and sanitized. Dip the plant's roots in fungicide to kill off any remaining fungal spores before potting into the clean growing medium. Only water the plant when the top inch of the soil is dry and never let the plant sit in water. For plants that are grown in the ground, it's best just to remove the infected plants and destroy them. Do not plant in the same spot until the soil has been allowed to dry out and has been treated with a fungicide.
Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Solutions: Measures to take to remove soil mold: Physically remove mold/mushrooms - remove and dispose of mushrooms. To remove mold, scrape 1/8” of soil from the surface. Add a layer of sand or gravel - adding 1/4” of sand or gravel on top of the soil surface will discourage new fungal growth Sprinkle an antifungal treatment around the plants - this doesn't have to be a commercial fungicide, as many growers swear by all-natural remedies like cinnamon and baking soda Some types of mold contain toxins that can be harmful to humans or irritate those with allergies or asthma. Wear a dust mask while performing these tasks.
Low light
A lack of sunlight will cause the stems and leaves to elongate and appear lighter in color.
Solutions: Low light can only be addressed by increasing light availability, and these measures will only stop further etoliation; current distortion cannot be reversed. Move plant to a position where it receives more light. Check the requirements for specific species, as too much sunlight can cause a plant to burn. Introduce appropriate artificial lighting. Some people choose to prune the longest stems so the plant can concentrate on healthy new growth under the improved lighting.
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Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Symptom Analysis
Your plant has dried out and turned brown. It might be starting to wilt, with no noticeable green around the stems and leaves. Touch the leaves, and they may crinkle under your fingers.
Possible causes of a dried out plant include:
- Not enough water. A lack of water will lead to dry plant tissue.
- Too much water. Watering too much can lead to root rot which makes the plant struggle to take up water. Rotted, mushy roots are a sign of overeating.
- Entering dormancy. As perennial plants enter their resting period known as dormancy, their leaves dry out and may fall off. This happens during decreasing day length.
- Exposure to herbicides and other toxic substances. If a plant is hit with a large dose herbicide or other toxic chemical, the plant will turn brown.
- Too much fertility. An excess of fertilizer can prevent plants from taking up water, leading to drying.
- Improper sun exposure. Just like humans, plants can get sunburn by intense, direct light. Plants can also dry out if they don’t receive enough light.
To determine whether the plant is still alive and can be saved, you can:
- Bend a stem. If the stem is pliable, the plant is still alive. If the stem breaks, the plant is dead.
- Gently scratch the stem with your fingernail for signs of green inside. If your plant is dead, the stem will be brittle and brown throughout.
- Cut the stems back a little bit a time for visible green growth. If none of the stems have visible green growth, the plant is dead.
Solutions
The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method.
- Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly.
- Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems.
- Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species.
- Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil.
- Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Prevention
Prevention involves providing your plant with the proper environment.
- Provide the proper amount of water. The amount of water depends on a plant’s size, species, and environment. A general rule is to allow soil to dry out between waterings.
- Place plants in the proper environment. Provide the proper hours of sun and temperature for your individual plant.
- Provide proper fertility. Most plants only need to be fertilized once or twice a year; don’t overapply.
- Keep plants free from toxic substances. Keep herbicides and toxic household chemicals away from your plants.
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Stem rot
Bacterial infection can cause the stems to become soft and rotten.
Overview
Stem rot is a serious disease and can affect many different types of plants. it can be particularly prevalent when the temperature of the soil is over 16 ℃ and there's a lot of moisture in the soil. This could be from unusually heavy rainfalls or too much irrigation. Once stem rot sets in, it's very difficult to get rid of the disease and most affected plants will have to be discarded. This is especially the case for vegetables, herbs, and other herbaceous plants that have soft stems. This is why it's important to ensure that the soil used for growing these plants is well-drained and that overwatering is avoided. Using good cultural practices also help in curbing these types of fungal diseases.
Symptom Analysis
Plants that have been affected by stem rot will first display a yellowing of the lower leaves. This is followed by obvious wilting and stunted growth.
If the stem of the affected plant is examined closely, there will be some dark discolorations starting near the base and moving upward. If the roots of affected plants are examined, they will appear dark and mushy instead of white and healthy-looking. Eventually, the entire plant will wilt and die.
Disease Cause
Stem rot is caused by a variety of soil-borne fungus pathogens. The type of fungus depends on the species of plant that is affected. Two fungi responsible for stem rot are Rhizoctonia and Fusarium. These fungal pathogens live in soil and migrate to the plant when conditions are optimum. This includes warm, humid weather and excessive soil moisture. Commonly, vegetable seedlings are affected by these fungi.
Sclerotinia sclerotiorum is another fungus that causes stem rot in plants. This fungus has a host range of over 350 different species of plants. Plants most susceptible to this fungus include many vegetable varieties such as cucumbers, beans, cilantro, carrots, cabbage, melons, lettuce, peas, onions, tomatoes, pumpkins, and squash. This fungus can produce different symptoms in different species. In some cases, the fungus causes irregular spots on stems and other plant material that appear water-soaked. On other plant species, the fungus appears as dry lesions that grow and girdle the stem of the plant.
The third type of fungus that causes stem rot is Phytophthora capsici. Plants that belong to the cucumber family are most susceptible to this fungal infection. This fungus manifests as water-soaked lesions on the stems that then turn brown and girdle the stem.
All of these fungal pathogens are transmitted to the plant by water splashing from the soil up onto the plant. That's because the fungal spores live in the soil where they wait for the right conditions to infect the plants.
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Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Overview
If there is soil mold around the plants, this isn't necessarily a reason to panic. Mold can occur for several reasons. Most of the time, it's harmless. The microorganisms that exist in mold are, in fact, necessary for healthy plant life. That said, it can be unsightly and in some cases, harmful to certain plants. It's important to understand why mold might be forming. It is only after the potential causes have been identified that steps can be taken to stop mold from spreading or appearing in the future.
Symptom Analysis
The most obvious sign of soil mold is, of course, mold observed on the surface of the soil. This can be fuzzy and white, yellow, or gray in color. Other symptoms may include:
- Mushrooms
- Wilted plants
- Plants are stunted in growth
- Soil has an odd "off" smell
- Premature leaf drop or flower/blossom/fruit rot
- Excess water is leaking from drainage holes
While soil mold doesn't always harm the growth of a plant, it can indicate the presence of a larger problem that needs to be addressed (and these problems can often harm plants).
Disease Cause
There are several causes for soil mold. Understanding why mold is growing should be the first step in deciding on the best course of action.
Some potential causes include:
- Overwatering - fungi consume excess water, so the presence of mold indicates that there is water that the plants aren't readily using
- Poor drainage - this can be caused by dense, compacted soil, a lack of drainage holes, or an inadequate pot size
- Poor air circulation - this is common in indoor-grown plants, especially in the winter when windows are closed
- Contaminated soil - while all soil contains microorganisms, soil can contain fungal spores that lead to mold growth
- Decomposing leaves on the soil surface feed the mold
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Low light
A lack of sunlight will cause the stems and leaves to elongate and appear lighter in color.
Overview
All plants require light, and if they do not receive it in the quantities that they require this distorts their growth in a process known as etiolation. In essence, etiolated plants are diverting all of their energy to growing taller in a desperate attempt to reach a position where they can meet their light requirements. Many other growth factors are harmed by this, and so light-deprived plants can become weak and distorted until they are almost unrecognizable. Low light symptoms are most commonly seen in houseplants, but outdoor specimens can also be affected.
Symptom Analysis
Although symptoms will vary in different plants, the general symptoms of low light are easy to spot.
- Plant stems grow tall and lanky.
- There are less leaves, and both leaves and stems tend to be pale and insipid looking. This is due to a shortage of chlorophyll.
- All plant parts become weakened and may droop, as energy is diverted toward too-fast growth as the plant stretches itself toward any source of light.
Disease Cause
Plants need sunlight in varying amounts for photosynthesis – a process that produces energy for growth and fruit and flower production. Low light causes a plant to divert all energy to upward (apical) growth in order to find better light. Plant hormones called auxins are transported from the actively-growing tip of the plant downwards, to suppress lateral growth. A drop in cellular pH triggers expansins, nonenzymatic cell wall proteins, to loosen cell walls and allow them to elongate. This elongation results in the abnormal lengthening of stems, especially internodes, or plant "legginess" which is observed in etoliated plants.
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Distribution of Old man cactus
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Habitat of Old man cactus
Calcareous canyons, limestone hills
Northern Hemisphere
South Hemisphere
Distribution Map of Old man cactus
Old man cactus is a cactus native to the arid regions of Central America. It has been extensively cultivated beyond its native habitat, thriving in subtropical and tropical climates across various continents. Today, old man cactus is found in botanical collections and as an ornamental plant in areas with suitable growing conditions, indicating a widespread introduced range thanks to global horticultural enthusiasts.
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
More Info on Old Man Cactus Growth and Care
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Basic Care Guide
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Lighting
Full sun
Old man cactus thrives in areas where the sun's rays are generous throughout the day and can also withstand spots where the sun is not as prevalent. Too much exposure can bleach the plant, while inadequate amounts can retard its development. Originally, this species evolved within habitats where sunshine is abundant.
Best Sunlight Practices 
Temperature
0 - 43 ℃
The old man cactus is native to tropical and subtropical regions of Mexico, where temperatures can range from 68 to 100 ℉ (20 to 38 ℃). As a result, the plant prefers warm temperatures in the range of 70 to 100 ℉ (21 to 38 ℃). During the winter months, it's important to protect the plant from cold temperatures and frost damage. It's recommended to bring the plant indoors or provide a warm shelter if temperatures dip below 50 ℉ (10 ℃).
Temp for Healthy Growth 
Transplant
6-8 feet
The prime time to transplant old man cactus is during the warm transition from late spring to early summer. Choose a sunny location with well-draining soil for old man cactus to thrive. Remember to handle it gently to avoid damaging its delicate hair-like spines.
Transplant Techniques 
Overwinter
0 - 43 ℃
Old man cactus thrives in its native arid Mexican climate, naturally adapting to chilly winters by slowing its metabolic processes. Its thick, woolly body, reminiscent of a frosty moustache, aids in insulation against cold. For indoor winter care, keep old man cactus around 10 to 15 degrees celsius, with minimal watering to mimic its natural hibernation period. Bright, indirect light is beneficial as well, ensuring old man cactus wakes up healthy for the spring growth season.
Winter Techniques 
Propagation
Spring, Summer
Old man cactus propagates best through cuttings during spring and summer. It has moderate propagation difficulty. Successful signs include new growth and rooting. Ensure cuttings dry before planting to avoid rot.
Propagation Techniques 
Feng shui direction
Northeast
The old man cactus subtly exudes strength and longevity, a likely ally for a balanced Qi. Placed in the Northeast of one's environment, old man cactus might amplify Earth energy, the dominant element in this direction. However, its impact remains interpretable. Importance lies in the harmony and unique connection you feel with old man cactus.
Fengshui Details Plants Related to Old man cactus
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Zanzibar gem
The zanzibar gem is a flowering green plant native to eastern Africa. It also gets the name emerald palm because of its bright, glossy color. Today, the zanzibar gem (Zamioculcas zamiifolia) is grown around the world as a houseplant, in part because it is easy to grow and care for. Though this plant is mildly toxic if ingested, its danger level is often overstated.
Screw pine
Screw pine (Pandanus tectorius) is a perennial tropical tree that is salt tolerant and grows in poor, salty or sandy soils. Screw pine is used to help stabilize soil conditions along coastal and beachfront properties. It also thrives in hot, windy areas and prefers full sun to semi-shade. Plants are dioecious with separate male and female plants. Male flowers are small, fragrant and short-lived. Female flowers are pineapple-like and are followed by fruit heads. Fruits are edible.
Turtle vine
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Pregnant onion
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Love-in-a-mist
Love-in-a-mist is a member of the buttercup family with leaves that resemble those of the dill plant. The flowers, which bloom in early summer, sport tiny black seeds at their centers. Love-in-a-mist seeds get added to bread in some Middle-Eastern countries with a flavor like oregano or nutmeg. But note that it could be toxic if ingested in quantities.
Meadow buttercup
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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
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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Old man cactus
Cephalocereus senilis
Also known as: Old man of Mexico
Old man cactus (Cephalocereus senilis) is a cactus native to eastern Mexico. Old man cactus is widely cultivated in gardens and as a houseplant, resulting in dwindling numbers of old man cactus that grow in the wild. This species is popular due to its woolly appearance. Old man cactus grows best in well-drained soil and bright sunlight, which cause the hairlike fibers to grow.
Hardiness Zones
9 to 12
Care Guide for Old man cactus
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Watering Care
During the active growing season between spring and fall, the Old man cactus should be watered regularly in well-draining soil. The top layer of soil should be allowed to dry out completely in between waterings. During the dormant winter season, regular waterings are not required for optimal growth.
Fertilizing Care
The old man cactus should be fertilized using commercial fertilizer formulated for cacti. Fertilizer should be applied during the early spring season. Fertilization can help achieve optimal bloom size for this species. Cactus food fertilizer can optionally be applied once or twice during the summer as well.
Soil Care
Sand, Neutral, Alkaline
Ideal Lighting
Full sun, Partial sun
Ideal Temperature
9 to 12
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Questions About Old man cactus
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Watering Sunlight Temperature Fertilizing What should I do if I water my Old man cactus too much or too little?
How often should I water my Old man cactus?
What should I consider when watering my Old man cactus?
How to water Old man cactus?
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Key Facts About Old man cactus
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Attributes of Old man cactus
Lifespan
Perennial
Plant Type
Succulent, Shrub
Planting Time
Spring
Bloom Time
Summer
Harvest Time
Summer
Plant Height
5 m to 15 m
Spread
15 cm to 30 cm
Leaf Color
Yellow
White
Flower Size
5 cm to 8 cm
Flower Color
Pink
Yellow
Stem Color
Pink
Dormancy
Winter dormancy
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
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Symbolism
Maternal love and care
Usages
Garden Use
Old man cactus is an excellent choice for growing in cactus gardens, rock gardens, and xeriscapes. However, this tall cactus also thrives when grown outdoors in pots on terraces and balconies. The plant’s surface becomes covered in an intriguing dense web of hair-like growth that also makes this cold-tolerate plant an exciting specimen plant in gardens with plenty of sunlight.
Scientific Classification of Old man cactus
Phylum
Vascular plants Class
Dicotyledons Order
Pinks, cacti, and allies Family
Cactuses Genus
Cephalocereus Species
Old man cactus 
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Common Pests & Diseases About Old man cactus
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Common issues for Old man cactus based on 10 million real cases
Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Solutions: The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method. Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly. Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems. Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species. Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil. Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
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Stem rot
Bacterial infection can cause the stems to become soft and rotten.
Solutions: If the plant is only infected a little, it can sometimes be saved. This mainly applies to houseplants that are grown in pots. Here's what to do. Remove the plant from the pot and gently shake off as much soil as possible. Using pruning tools that have been disinfected, remove any diseased foliage and roots. Be sure the new pot has good drainage holes and wash it with one part bleach and nine parts water to ensure that it is completely clean and sanitized. Dip the plant's roots in fungicide to kill off any remaining fungal spores before potting into the clean growing medium. Only water the plant when the top inch of the soil is dry and never let the plant sit in water. For plants that are grown in the ground, it's best just to remove the infected plants and destroy them. Do not plant in the same spot until the soil has been allowed to dry out and has been treated with a fungicide.
Learn More About the Stem rot ![more]()
Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Solutions: Measures to take to remove soil mold: Physically remove mold/mushrooms - remove and dispose of mushrooms. To remove mold, scrape 1/8” of soil from the surface. Add a layer of sand or gravel - adding 1/4” of sand or gravel on top of the soil surface will discourage new fungal growth Sprinkle an antifungal treatment around the plants - this doesn't have to be a commercial fungicide, as many growers swear by all-natural remedies like cinnamon and baking soda Some types of mold contain toxins that can be harmful to humans or irritate those with allergies or asthma. Wear a dust mask while performing these tasks.
Learn More About the Soil mold ![more]()
Low light
A lack of sunlight will cause the stems and leaves to elongate and appear lighter in color.
Solutions: Low light can only be addressed by increasing light availability, and these measures will only stop further etoliation; current distortion cannot be reversed. Move plant to a position where it receives more light. Check the requirements for specific species, as too much sunlight can cause a plant to burn. Introduce appropriate artificial lighting. Some people choose to prune the longest stems so the plant can concentrate on healthy new growth under the improved lighting.
Learn More About the Low light ![more]()
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Plant dried up
The entire plant may dry out due to dieback or normal seasonal dormancy.
Symptom Analysis
Your plant has dried out and turned brown. It might be starting to wilt, with no noticeable green around the stems and leaves. Touch the leaves, and they may crinkle under your fingers.
Possible causes of a dried out plant include:
- Not enough water. A lack of water will lead to dry plant tissue.
- Too much water. Watering too much can lead to root rot which makes the plant struggle to take up water. Rotted, mushy roots are a sign of overeating.
- Entering dormancy. As perennial plants enter their resting period known as dormancy, their leaves dry out and may fall off. This happens during decreasing day length.
- Exposure to herbicides and other toxic substances. If a plant is hit with a large dose herbicide or other toxic chemical, the plant will turn brown.
- Too much fertility. An excess of fertilizer can prevent plants from taking up water, leading to drying.
- Improper sun exposure. Just like humans, plants can get sunburn by intense, direct light. Plants can also dry out if they don’t receive enough light.
To determine whether the plant is still alive and can be saved, you can:
- Bend a stem. If the stem is pliable, the plant is still alive. If the stem breaks, the plant is dead.
- Gently scratch the stem with your fingernail for signs of green inside. If your plant is dead, the stem will be brittle and brown throughout.
- Cut the stems back a little bit a time for visible green growth. If none of the stems have visible green growth, the plant is dead.
Solutions
The solution for a dried out plant depends on the cause, so determine the cause before selecting a treatment method.
- Adjust your watering: Stick your finger in the soil near the roots. If it feels bone dry or overly saturated, you need to adjust your watering frequency accordingly.
- Prune back dead foliage: Snip off any brown stems and leaves on the plant to make space for new growth. This encourages the roots to send up fresh stems.
- Move to a proper environment. This may involve decreasing or increasing sun exposure, depending on the species.
- Decrease fertilizer applications. If you have applied too much fertilizer, you can repot plants with fresh potting soil.
- Wait. If your plant has dried out as daylight is decreasing, it is entering dormancy. Decrease watering and wait until the plant resumes growth.
Prevention
Prevention involves providing your plant with the proper environment.
- Provide the proper amount of water. The amount of water depends on a plant’s size, species, and environment. A general rule is to allow soil to dry out between waterings.
- Place plants in the proper environment. Provide the proper hours of sun and temperature for your individual plant.
- Provide proper fertility. Most plants only need to be fertilized once or twice a year; don’t overapply.
- Keep plants free from toxic substances. Keep herbicides and toxic household chemicals away from your plants.
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Stem rot
Bacterial infection can cause the stems to become soft and rotten.
Overview
Stem rot is a serious disease and can affect many different types of plants. it can be particularly prevalent when the temperature of the soil is over 16 ℃ and there's a lot of moisture in the soil. This could be from unusually heavy rainfalls or too much irrigation. Once stem rot sets in, it's very difficult to get rid of the disease and most affected plants will have to be discarded. This is especially the case for vegetables, herbs, and other herbaceous plants that have soft stems. This is why it's important to ensure that the soil used for growing these plants is well-drained and that overwatering is avoided. Using good cultural practices also help in curbing these types of fungal diseases.
Symptom Analysis
Plants that have been affected by stem rot will first display a yellowing of the lower leaves. This is followed by obvious wilting and stunted growth.
If the stem of the affected plant is examined closely, there will be some dark discolorations starting near the base and moving upward. If the roots of affected plants are examined, they will appear dark and mushy instead of white and healthy-looking. Eventually, the entire plant will wilt and die.
Disease Cause
Stem rot is caused by a variety of soil-borne fungus pathogens. The type of fungus depends on the species of plant that is affected. Two fungi responsible for stem rot are Rhizoctonia and Fusarium. These fungal pathogens live in soil and migrate to the plant when conditions are optimum. This includes warm, humid weather and excessive soil moisture. Commonly, vegetable seedlings are affected by these fungi.
Sclerotinia sclerotiorum is another fungus that causes stem rot in plants. This fungus has a host range of over 350 different species of plants. Plants most susceptible to this fungus include many vegetable varieties such as cucumbers, beans, cilantro, carrots, cabbage, melons, lettuce, peas, onions, tomatoes, pumpkins, and squash. This fungus can produce different symptoms in different species. In some cases, the fungus causes irregular spots on stems and other plant material that appear water-soaked. On other plant species, the fungus appears as dry lesions that grow and girdle the stem of the plant.
The third type of fungus that causes stem rot is Phytophthora capsici. Plants that belong to the cucumber family are most susceptible to this fungal infection. This fungus manifests as water-soaked lesions on the stems that then turn brown and girdle the stem.
All of these fungal pathogens are transmitted to the plant by water splashing from the soil up onto the plant. That's because the fungal spores live in the soil where they wait for the right conditions to infect the plants.
Solutions
If the plant is only infected a little, it can sometimes be saved. This mainly applies to houseplants that are grown in pots. Here's what to do.
- Remove the plant from the pot and gently shake off as much soil as possible.
- Using pruning tools that have been disinfected, remove any diseased foliage and roots.
- Be sure the new pot has good drainage holes and wash it with one part bleach and nine parts water to ensure that it is completely clean and sanitized.
- Dip the plant's roots in fungicide to kill off any remaining fungal spores before potting into the clean growing medium.
- Only water the plant when the top inch of the soil is dry and never let the plant sit in water.
For plants that are grown in the ground, it's best just to remove the infected plants and destroy them. Do not plant in the same spot until the soil has been allowed to dry out and has been treated with a fungicide.
Prevention
For outdoor gardens:
- Raking the garden thoroughly in the springtime will help to cut down on pathogens that may be living in the soil.
- Using a copper fungicide on plants in the springtime will cut down on fungal growth and prevent the spread of infection.
- Placing a heavy layer of mulch on top of the soil will also prevent pathogens from splashing up onto the stems of plants.
- Place plants at the recommended spacing to encourage better air flow between them.
- Water plants at the base instead of overhead to prevent excessive moisture on foliage.
For indoor plants:
- Avoid overwatering houseplants and ensure the roots do not sit in water.
- Make sure that indoor plants receive adequate air circulation and light.
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Soil mold
Moist environments may encourage the growth of mushrooms or other fungi at the soil's surface that do not affect the health of the plant.
Overview
If there is soil mold around the plants, this isn't necessarily a reason to panic. Mold can occur for several reasons. Most of the time, it's harmless. The microorganisms that exist in mold are, in fact, necessary for healthy plant life. That said, it can be unsightly and in some cases, harmful to certain plants. It's important to understand why mold might be forming. It is only after the potential causes have been identified that steps can be taken to stop mold from spreading or appearing in the future.
Symptom Analysis
The most obvious sign of soil mold is, of course, mold observed on the surface of the soil. This can be fuzzy and white, yellow, or gray in color. Other symptoms may include:
- Mushrooms
- Wilted plants
- Plants are stunted in growth
- Soil has an odd "off" smell
- Premature leaf drop or flower/blossom/fruit rot
- Excess water is leaking from drainage holes
While soil mold doesn't always harm the growth of a plant, it can indicate the presence of a larger problem that needs to be addressed (and these problems can often harm plants).
Disease Cause
There are several causes for soil mold. Understanding why mold is growing should be the first step in deciding on the best course of action.
Some potential causes include:
- Overwatering - fungi consume excess water, so the presence of mold indicates that there is water that the plants aren't readily using
- Poor drainage - this can be caused by dense, compacted soil, a lack of drainage holes, or an inadequate pot size
- Poor air circulation - this is common in indoor-grown plants, especially in the winter when windows are closed
- Contaminated soil - while all soil contains microorganisms, soil can contain fungal spores that lead to mold growth
- Decomposing leaves on the soil surface feed the mold
Solutions
Measures to take to remove soil mold:
- Physically remove mold/mushrooms - remove and dispose of mushrooms. To remove mold, scrape 1/8” of soil from the surface.
- Add a layer of sand or gravel - adding 1/4” of sand or gravel on top of the soil surface will discourage new fungal growth
- Sprinkle an antifungal treatment around the plants - this doesn't have to be a commercial fungicide, as many growers swear by all-natural remedies like cinnamon and baking soda
Some types of mold contain toxins that can be harmful to humans or irritate those with allergies or asthma. Wear a dust mask while performing these tasks.
Prevention
Follow these practices to prevent soil mold from forming.
- Limit moisture - avoid keeping soil damp, and allow it to dry out between waterings. Watering from the bottom of pots with drainage can allow the surface soil to stay dry.
- Provide aeration - increase airflow around the plants using a fan or wind.
- Repot - if the container is too small or lacks proper drainage, transplant the plant into a new, better-draining container.
- Apply a layer of sand - apply 6 mm of sand on top of soil.
- Use potting mix - when planting, only use potting mix instead of regular soil, as this is specially formulated for the proper moisture retention.
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Low light
A lack of sunlight will cause the stems and leaves to elongate and appear lighter in color.
Overview
All plants require light, and if they do not receive it in the quantities that they require this distorts their growth in a process known as etiolation. In essence, etiolated plants are diverting all of their energy to growing taller in a desperate attempt to reach a position where they can meet their light requirements. Many other growth factors are harmed by this, and so light-deprived plants can become weak and distorted until they are almost unrecognizable. Low light symptoms are most commonly seen in houseplants, but outdoor specimens can also be affected.
Symptom Analysis
Although symptoms will vary in different plants, the general symptoms of low light are easy to spot.
- Plant stems grow tall and lanky.
- There are less leaves, and both leaves and stems tend to be pale and insipid looking. This is due to a shortage of chlorophyll.
- All plant parts become weakened and may droop, as energy is diverted toward too-fast growth as the plant stretches itself toward any source of light.
Disease Cause
Plants need sunlight in varying amounts for photosynthesis – a process that produces energy for growth and fruit and flower production. Low light causes a plant to divert all energy to upward (apical) growth in order to find better light. Plant hormones called auxins are transported from the actively-growing tip of the plant downwards, to suppress lateral growth. A drop in cellular pH triggers expansins, nonenzymatic cell wall proteins, to loosen cell walls and allow them to elongate. This elongation results in the abnormal lengthening of stems, especially internodes, or plant "legginess" which is observed in etoliated plants.
Solutions
Low light can only be addressed by increasing light availability, and these measures will only stop further etoliation; current distortion cannot be reversed.
- Move plant to a position where it receives more light. Check the requirements for specific species, as too much sunlight can cause a plant to burn.
- Introduce appropriate artificial lighting.
- Some people choose to prune the longest stems so the plant can concentrate on healthy new growth under the improved lighting.
Prevention
To avoid etiolation, provide an adequate amount of light from the beginning.
- Choose a location that matches each plant's ideal light needs. Many indoor plants do best in or near a south-facing window, which will provide the longest hours of sunlight. Flowering plants and those with colored leaves typically need more light than purely-green plants, as photosynthesis occurs in the green portions of leaves.
- Select plants with light needs that match a location's conditions. Some cultivars and varieties require less light than others.
- Use a grow light. Darker locations may require artificial illumination. A grow light may also become more necessary during winter, when sunlit hours are at their shortest.
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Distribution of Old man cactus
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Habitat of Old man cactus
Calcareous canyons, limestone hills
Northern Hemisphere
South Hemisphere
Distribution Map of Old man cactus
Old man cactus is a cactus native to the arid regions of Central America. It has been extensively cultivated beyond its native habitat, thriving in subtropical and tropical climates across various continents. Today, old man cactus is found in botanical collections and as an ornamental plant in areas with suitable growing conditions, indicating a widespread introduced range thanks to global horticultural enthusiasts.
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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Lighting
Indoor
Indoor
Outdoor
Choose a site here for personalized care tips. 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
Old man cactus thrives in areas where the sun's rays are generous throughout the day and can also withstand spots where the sun is not as prevalent. Too much exposure can bleach the plant, while inadequate amounts can retard its development. Originally, this species evolved within habitats where sunshine is abundant.
Preferred
Tolerable
Unsuitable
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.
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
Old man cactus 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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(Symptom details and solutions)
Leggy or sparse growth
The spaces between leaves or stems of your old man cactus 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.
Slower or no new growth
Old man cactus enters a survival mode when light conditions are poor, which leads to a halt in leaf production. As a result, the plant's growth becomes delayed or stops altogether.
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
Old man cactus require strong light to thrive, and some are remarkably resilient to sun exposure, rarely suffering from sunburn.
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(Symptom details and solutions)
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
Indoor
Indoor
Outdoor
Choose a site here for personalized care tips. Requirements
Ideal
Tolerable
Unsuitable
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 old man cactus is native to tropical and subtropical regions of Mexico, where temperatures can range from 68 to 100 ℉ (20 to 38 ℃). As a result, the plant prefers warm temperatures in the range of 70 to 100 ℉ (21 to 38 ℃). During the winter months, it's important to protect the plant from cold temperatures and frost damage. It's recommended to bring the plant indoors or provide a warm shelter if temperatures dip below 50 ℉ (10 ℃).
Regional wintering strategies
Old man cactus 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 Old man cactus 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 Old man cactus
Old man cactus 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 Old man cactus
During summer, Old man cactus 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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