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Periwinkle 'Variegata'
Vinca major 'Variegata'
Also known as : Bigleaf periwinkle 'Variegata', Greater periwinkle, Bigleaf periwinkle, Blue periwinkle
A variant of periwinkle named for its unusual size, periwinkle 'Variegata', or "greater periwinkle," sprouts beautiful blue-white flowers from mid-spring to early autumn. It thrives in full sun and requires very little maintenance. In fact, its ability to proliferate means that it will quickly spread across a garden if not attended to, forming a mass of its own kind.
Hardiness Zones
9 to 11
Care Guide for Periwinkle 'Variegata'
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Watering Care
Moisture-loving, keep the soil moist but do not let water accumulate.
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Periwinkle 'Variegata'
Sunlight
Full sun
Hardiness Zones
9 to 11
Questions About Periwinkle 'Variegata'
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Watering 
Pruning 
Sunlight 
Fertilizing What is the best way to water my Periwinkle 'Variegata'?
When watering the Periwinkle 'Variegata', you should aim to use filtered water that is at room temperature. Filtered water is better for this plant, as tap water can contain particles that are harmful to its health. The reason that the water should be at room temperature or slightly warmer is that the Periwinkle 'Variegata' comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.
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What should I do if I water my Periwinkle 'Variegata' too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Periwinkle 'Variegata', but overwatering is a far more common issue. When this species receives too much water, its stems and leaves may begin to wilt and turn from green to yellow. Overwatering over a prolonged period may also lead to diseases such as root rot, mold, and mildew, all of which can kill your plant. Underwatering is far less common for the Periwinkle 'Variegata', as this plant has decent drought tolerance. However, underwatering remains a possibility, and when it occurs, you can expect to find that the leaves of your Periwinkle 'Variegata' have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your Periwinkle 'Variegata'. Some of the diseases that arise from overwatering, such as root rot, may not be correctable if you wait too long. If you see early signs of overwatering, you should reduce your watering schedule immediately. You may also want to assess the quality of soil in which your Periwinkle 'Variegata' grows. If you find that the soil drains very poorly, you should replace it immediately with a loose, well-draining potting mix. On the other hand, if you find signs that your Periwinkle 'Variegata' is receiving too little water, all you need to do is water more regularly until those signs have subsided.
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How often should I water my Periwinkle 'Variegata'?
If your plant is in a pot. The most precise way to decide whether your Periwinkle 'Variegata' needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water. If you grow your Periwinkle 'Variegata' outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the Periwinkle 'Variegata' can show an admirable ability to withstand drought.
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How much water does my Periwinkle 'Variegata' need?
When it comes time to water your Periwinkle 'Variegata', you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.
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How should I water my Periwinkle 'Variegata' at different growth stages?
The water needs of the Periwinkle 'Variegata' can change depending on growth stages as well. For example, when your Periwinkle 'Variegata' is in the first few years of its life, or if you have just transplanted it to a new growing location, you will need to give more water than usual. During both of those stages, your Periwinkle 'Variegata' will put a lot of energy towards sprouting new roots that will then support future growth. For those roots to perform their best, they need a bit more moisture than they would at a more mature phase. After a few seasons, your Periwinkle 'Variegata' will need much less water. Another growth stage in which this plant may need more water is during the bloom period. Flower development can make use of a significant amount of moisture, which is why you might need to give your Periwinkle 'Variegata' more water at this time.
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How should I water my Periwinkle 'Variegata' through the seasons?
The Periwinkle 'Variegata' will have its highest water needs during the hottest months of the year. During the height of summer, you may need to give this plant water more than once per week, depending on how fast the soil dries out. The opposite is true during the winter. In winter, your plant will enter a dormant phase, in which it will need far less water than usual. In fact, you may not need to water this plant at all during the winter months. However, if you do water during winter, you should not do so more than about once per month. Watering too much at this time will make it more likely that your Periwinkle 'Variegata' will contract a disease.
Read More ![more]()
What's the difference between watering my Periwinkle 'Variegata' indoors and outdoors?
It is most common to grow the Periwinkle 'Variegata' indoors for any gardener that does not live in temperate and tropical regions. Those gardeners should consider the fact that soil in a container can dry out a bit faster than ground soil. Also, the presence of drying elements such as air conditioning units can cause your Periwinkle 'Variegata' to need water on a more frequent basis as well. if you planted it outside. When that is the case, it’s likely you won’t need to water your Periwinkle 'Variegata' very much at all. If you receive rainfall on a regular basis, that may be enough to keep your plant alive. Alternatively, those who grow this plant inside will need to water it more often, as allowing rainwater to soak the soil will not be an option.
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Key Facts About Periwinkle 'Variegata'
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Attributes of Periwinkle 'Variegata'
Lifespan
Perennial
Plant Type
Herb
Plant Height
50 cm
Spread
2.5 m
Leaf Color
White
Green
Flower Size
5 cm
Flower Color
Purple
Blue
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
Scientific Classification of Periwinkle 'Variegata'
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Common Pests & Diseases About Periwinkle 'Variegata'
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Common issues for Periwinkle 'Variegata' based on 10 million real cases
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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.
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.
Powdery Mildew
Powdery mildew is a white mold that appears on leaves. It can be wiped away.
Solutions: As powdery Mildew spores are transported by the wind, it can be tricky to put a complete stop to the spread of the fungus. Luckily, there are several easy treatments for plants that are exhibiting symptoms: If powdery Mildew seems to be impacting isolated leaves or stems, they can simply be trimmed away and disposed of. Disinfect pruning tools after doing this. Remove any plant debris from the ground around the infected plants and dispose of it in the garbage. Then, cover the soil with a thick layer of mulch to limit reinfection. Milk sprays have been found to be useful in controlling powdery Mildew. Make up a spray consisting of 60% water and 40% milk and spray on the affected plants. This can also be used as a preventative measure. In cases where powdery Mildew is more widespread, plants can be sprayed with a mild sulfur- or copper-based fungicide or a non-toxic solution made from baking soda and soap. Sprays can help areas that have been recently infected, though they are less effective against well-established infections. If possible, try transplanting the plants to a sunnier location. Though powdery Mildew does fine in hot, dry conditions, it is unable to reproduce without some humidity. Putting plants in more direct sunlight can help stop the spread of the fungus. Trimming around closely-packed plants can help improve airflow, which also prevents the reproduction of the fungus.
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.
Leaf miners
Leaf miners scar the leaves with curved white streaks or rounded white spots with brown centers.
Solutions: Leaf miners, although relatively harmless at first, can quickly multiply and devastate your plants in the coming weeks. For severe cases: Spray an organic insecticide. For an organic solution, spray a diluted mixture of azadirachtin, a compound derived from neem seeds, above and below leaves. Spray a synthetic insecticide. Spray a product that contains spinosad, such as Entrust, making sure to cover all sides of the leaves. Introduce beneficial insects. Introduce beneficial insects that eat leaf miners, such as parasitic wasps or Syrphid flies. For less severe cases: Prune infected tissue. Remove and dispose of leaves that have any sign of leaf miner damage.
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
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
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
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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Powdery Mildew
Powdery mildew is a white mold that appears on leaves. It can be wiped away.
Overview
Powdery Mildew is a common disease and the scourge of many home gardeners. It affects a large variety of plants including many varieties of vegetables. The disease is easy to identify but not always easy to get rid of once it has started to infect plants.
Powdery Mildew thrives in warm, humid conditions and can quickly spread from plant to plant. Although this disease will not kill the plants, a severe infestation will inhibit plant growth and fruit production.
Symptom Analysis
Powdery Mildew appears as pale yellow spots on leaves. These spots then become white and look powdery. The fungus spreads quickly both on the top and underside of the leaves and on the plant stems.
These white, powdery spots will join up and soon, almost the entire surface of the leaf appears white. Eventually, the edges of the leaf will turn brown and dry and start to die.
In severe infections, even the flower buds will turn white and become disfigured. Fruit will ripen prematurely and be inedible.
Disease Cause
Powdery Mildew is caused by a fungus. There are many different genera of fungus diseases that cause powdery Mildew. The fungal spores overwinter inside leaf buds and on plant material that has dropped to the soil below. As the weather warms up, these spores are then carried onto the plant by water, wind, and insects. Powdery Mildew can also be more severe in areas that experience warm, dry climates, even though the spores require some humidity to germinate.
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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
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
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
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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Leaf miners
Leaf miners scar the leaves with curved white streaks or rounded white spots with brown centers.
Symptom Analysis
The leaves on your plants are showing clear/white trails, which appear like parts have been hollowed out. These trails are narrow at first and become wide patches over time. In some cases, leaves will be completely hollow and dry on the plant. As the name suggests, leaf miners are responsible.
Leaf miners are most common in the early spring when they begin to hatch and reproduce. They are tiny 1/16th inch larvae that resemble small grains of rice. The larvae are found inside leaves. The adult stage, a fly, lays eggs in between the layers of a leaf. When the eggs hatch, the larvae eat the tender nutritious inner leaves.
Solutions
Leaf miners, although relatively harmless at first, can quickly multiply and devastate your plants in the coming weeks.
For severe cases:
- Spray an organic insecticide. For an organic solution, spray a diluted mixture of azadirachtin, a compound derived from neem seeds, above and below leaves.
- Spray a synthetic insecticide. Spray a product that contains spinosad, such as Entrust, making sure to cover all sides of the leaves.
- Introduce beneficial insects. Introduce beneficial insects that eat leaf miners, such as parasitic wasps or Syrphid flies.
For less severe cases:
- Prune infected tissue. Remove and dispose of leaves that have any sign of leaf miner damage.
Prevention
Although leaf miners are easy to control, preventing them is ideal. Our recommendations are:
- Physically exclude adults. Cover plants with floating row covers as soon as you put them in the ground.
- Remove weeds and debris. Keep your garden weeded to lower the number of plants leaf miners can feed and breed on.
- Avoid introducing infected plants. Carefully inspect new plants for leaf miners before adding them to your garden or home.
- Avoid broad-spectrum pesticides. Leaf miners can usually be controlled by natural predatory insects. Do not apply broad-spectrum insecticides that could harm these beneficial insects.
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More Info on Periwinkle 'variegata' Growth and Care
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Basic Care Guide
Lighting
Full sun
Periwinkle 'Variegata' thrives under consistent exposure to sunlight, capable of withstanding its intensity in its entirety, fostering healthier growth. However, it can endure varying light levels, from substantial shadows to barely any sun, relating back to its native habitats' diverse light conditions. Too much or too little sunlight might lead to weaker plants.
Best Sunlight Practices 
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About
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More About How-Tos
Periwinkle 'Variegata'
Vinca major 'Variegata'
Also known as: Bigleaf periwinkle 'Variegata', Greater periwinkle, Bigleaf periwinkle, Blue periwinkle
A variant of periwinkle named for its unusual size, periwinkle 'Variegata', or "greater periwinkle," sprouts beautiful blue-white flowers from mid-spring to early autumn. It thrives in full sun and requires very little maintenance. In fact, its ability to proliferate means that it will quickly spread across a garden if not attended to, forming a mass of its own kind.
Hardiness Zones
9 to 11
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Care Guide for Periwinkle 'Variegata'
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Watering Care
Moisture-loving, keep the soil moist but do not let water accumulate.
Soil Care
Chalky, Clay, Loam, Sand, Acidic, Neutral
Ideal Lighting
Full sun, Partial sun, Full shade
Ideal Temperature
9 to 11
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Questions About Periwinkle 'Variegata'
Feedback
Watering Pruning Sunlight Fertilizing What is the best way to water my Periwinkle 'Variegata'?
What should I do if I water my Periwinkle 'Variegata' too much or too little?
How often should I water my Periwinkle 'Variegata'?
How much water does my Periwinkle 'Variegata' need?
How should I water my Periwinkle 'Variegata' at different growth stages?
How should I water my Periwinkle 'Variegata' through the seasons?
What's the difference between watering my Periwinkle 'Variegata' indoors and outdoors?
Get tips and tricks for your plants.
Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.
Download the App for Free
Key Facts About Periwinkle 'Variegata'
Feedback
Attributes of Periwinkle 'Variegata'
Lifespan
Perennial
Plant Type
Herb
Plant Height
50 cm
Spread
2.5 m
Leaf Color
White
Green
Flower Size
5 cm
Flower Color
Purple
Blue
Leaf type
Evergreen
Ideal Temperature
20 - 38 ℃
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Scientific Classification of Periwinkle 'Variegata'
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Common Pests & Diseases About Periwinkle 'Variegata'
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Common issues for Periwinkle 'Variegata' based on 10 million real cases
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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.
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]()
Powdery Mildew
Powdery mildew is a white mold that appears on leaves. It can be wiped away.
Solutions: As powdery Mildew spores are transported by the wind, it can be tricky to put a complete stop to the spread of the fungus. Luckily, there are several easy treatments for plants that are exhibiting symptoms: If powdery Mildew seems to be impacting isolated leaves or stems, they can simply be trimmed away and disposed of. Disinfect pruning tools after doing this. Remove any plant debris from the ground around the infected plants and dispose of it in the garbage. Then, cover the soil with a thick layer of mulch to limit reinfection. Milk sprays have been found to be useful in controlling powdery Mildew. Make up a spray consisting of 60% water and 40% milk and spray on the affected plants. This can also be used as a preventative measure. In cases where powdery Mildew is more widespread, plants can be sprayed with a mild sulfur- or copper-based fungicide or a non-toxic solution made from baking soda and soap. Sprays can help areas that have been recently infected, though they are less effective against well-established infections. If possible, try transplanting the plants to a sunnier location. Though powdery Mildew does fine in hot, dry conditions, it is unable to reproduce without some humidity. Putting plants in more direct sunlight can help stop the spread of the fungus. Trimming around closely-packed plants can help improve airflow, which also prevents the reproduction of the fungus.
Learn More About the Powdery Mildew ![more]()
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]()
Leaf miners
Leaf miners scar the leaves with curved white streaks or rounded white spots with brown centers.
Solutions: Leaf miners, although relatively harmless at first, can quickly multiply and devastate your plants in the coming weeks. For severe cases: Spray an organic insecticide. For an organic solution, spray a diluted mixture of azadirachtin, a compound derived from neem seeds, above and below leaves. Spray a synthetic insecticide. Spray a product that contains spinosad, such as Entrust, making sure to cover all sides of the leaves. Introduce beneficial insects. Introduce beneficial insects that eat leaf miners, such as parasitic wasps or Syrphid flies. For less severe cases: Prune infected tissue. Remove and dispose of leaves that have any sign of leaf miner damage.
Learn More About the Leaf miners ![more]()
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
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
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
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.
Prevention
Prevention may require less effort than attempts to eradicate infestations that have already begun. Here are our top steps for prevention:
- Monitor plants. Check plants regularly for caterpillar eggs on leaves. If they do not belong to an endangered species, they should be squished.
- Use insect netting. Cover plants with insect netting to prevent butterflies and moths from laying eggs on plants.
- Apply diatomaceous earth. Apply DE to plants early in the season and reapply after rain.
- Encourage plant diversity. This will attract predatory insects including parasitic wasps.
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Powdery Mildew
Powdery mildew is a white mold that appears on leaves. It can be wiped away.
Overview
Powdery Mildew is a common disease and the scourge of many home gardeners. It affects a large variety of plants including many varieties of vegetables. The disease is easy to identify but not always easy to get rid of once it has started to infect plants.
Powdery Mildew thrives in warm, humid conditions and can quickly spread from plant to plant. Although this disease will not kill the plants, a severe infestation will inhibit plant growth and fruit production.
Symptom Analysis
Powdery Mildew appears as pale yellow spots on leaves. These spots then become white and look powdery. The fungus spreads quickly both on the top and underside of the leaves and on the plant stems.
These white, powdery spots will join up and soon, almost the entire surface of the leaf appears white. Eventually, the edges of the leaf will turn brown and dry and start to die.
In severe infections, even the flower buds will turn white and become disfigured. Fruit will ripen prematurely and be inedible.
Disease Cause
Powdery Mildew is caused by a fungus. There are many different genera of fungus diseases that cause powdery Mildew. The fungal spores overwinter inside leaf buds and on plant material that has dropped to the soil below. As the weather warms up, these spores are then carried onto the plant by water, wind, and insects. Powdery Mildew can also be more severe in areas that experience warm, dry climates, even though the spores require some humidity to germinate.
Solutions
As powdery Mildew spores are transported by the wind, it can be tricky to put a complete stop to the spread of the fungus. Luckily, there are several easy treatments for plants that are exhibiting symptoms:
- If powdery Mildew seems to be impacting isolated leaves or stems, they can simply be trimmed away and disposed of. Disinfect pruning tools after doing this.
- Remove any plant debris from the ground around the infected plants and dispose of it in the garbage. Then, cover the soil with a thick layer of mulch to limit reinfection.
- Milk sprays have been found to be useful in controlling powdery Mildew. Make up a spray consisting of 60% water and 40% milk and spray on the affected plants. This can also be used as a preventative measure.
- In cases where powdery Mildew is more widespread, plants can be sprayed with a mild sulfur- or copper-based fungicide or a non-toxic solution made from baking soda and soap. Sprays can help areas that have been recently infected, though they are less effective against well-established infections.
- If possible, try transplanting the plants to a sunnier location. Though powdery Mildew does fine in hot, dry conditions, it is unable to reproduce without some humidity. Putting plants in more direct sunlight can help stop the spread of the fungus.
- Trimming around closely-packed plants can help improve airflow, which also prevents the reproduction of the fungus.
Prevention
There are a few ways to prevent a powdery Mildew infection from occurring in the first place:
- Preemptive chemical controls, including fungicides and non-toxic solutions, can help prevent powdery Mildew from becoming established on plants.
- When placing new plants, allow enough space between each one to provide adequate air circulation.
- Water at the base of plants rather than from overhead.
- Many mildew-resistant strains of common garden plants are available. Consider these in areas that have a Mediterranean climate.
- Powdery Mildew can form tiny, round black structures, called cleistothecia, as the growing season draws to a close. These hardy, dry structures help the fungus survive winter. Raking away debris over the winter can remove stowaway cleistothecia and will help prevent plants from being reinfected.
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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
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
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
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
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
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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Leaf miners
Leaf miners scar the leaves with curved white streaks or rounded white spots with brown centers.
Symptom Analysis
The leaves on your plants are showing clear/white trails, which appear like parts have been hollowed out. These trails are narrow at first and become wide patches over time. In some cases, leaves will be completely hollow and dry on the plant. As the name suggests, leaf miners are responsible.
Leaf miners are most common in the early spring when they begin to hatch and reproduce. They are tiny 1/16th inch larvae that resemble small grains of rice. The larvae are found inside leaves. The adult stage, a fly, lays eggs in between the layers of a leaf. When the eggs hatch, the larvae eat the tender nutritious inner leaves.
Solutions
Leaf miners, although relatively harmless at first, can quickly multiply and devastate your plants in the coming weeks.
For severe cases:
- Spray an organic insecticide. For an organic solution, spray a diluted mixture of azadirachtin, a compound derived from neem seeds, above and below leaves.
- Spray a synthetic insecticide. Spray a product that contains spinosad, such as Entrust, making sure to cover all sides of the leaves.
- Introduce beneficial insects. Introduce beneficial insects that eat leaf miners, such as parasitic wasps or Syrphid flies.
For less severe cases:
- Prune infected tissue. Remove and dispose of leaves that have any sign of leaf miner damage.
Prevention
Although leaf miners are easy to control, preventing them is ideal. Our recommendations are:
- Physically exclude adults. Cover plants with floating row covers as soon as you put them in the ground.
- Remove weeds and debris. Keep your garden weeded to lower the number of plants leaf miners can feed and breed on.
- Avoid introducing infected plants. Carefully inspect new plants for leaf miners before adding them to your garden or home.
- Avoid broad-spectrum pesticides. Leaf miners can usually be controlled by natural predatory insects. Do not apply broad-spectrum insecticides that could harm these beneficial insects.
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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, Full shade
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
Periwinkle 'Variegata' thrives under consistent exposure to sunlight, capable of withstanding its intensity in its entirety, fostering healthier growth. However, it can endure varying light levels, from substantial shadows to barely any sun, relating back to its native habitats' diverse light conditions. Too much or too little sunlight might lead to weaker plants.
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
Periwinkle 'Variegata' thrives in full sunlight and is commonly grown outdoors where it receives ample sunlight. When placed in rooms with inadequate lighting, symptoms of light deficiency may not be readily apparent.
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(Symptom details and solutions)
Small leaves
New leaves may grow smaller in size compared to the previous ones once they have matured.
Leggy or sparse growth
The spaces between leaves or stems of your Periwinkle 'Variegata' 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.
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.
Slower or no new growth
Periwinkle 'Variegata' 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.
Lighter-colored new leaves
Insufficient sunlight can cause leaves to develop irregular color patterns or appear pale. This indicates a lack of chlorophyll and essential nutrients.
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
Periwinkle 'Variegata' thrives in full sun exposure and can tolerate intense sunlight. With their remarkable resilience, symptoms of sunburn may not be easily visible, as they rarely suffer from it.
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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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