What is Sunscald on Plants?

Sunscald, also known as sunburn or scorch, is a common problem that affects plants, especially those grown indoors. It occurs when a plant is exposed to intense sunlight, causing damage to its leaves and stems. Sunscald can lead to unsightly marks, discoloration, and even death if left untreated. As an indoor plant enthusiast, it's essential to understand the causes, symptoms, and remedies for sunscald to keep your plants healthy and thriving.

Is your plant looking a little sad & needs some help? Shopping for a new leafy friend and want to make sure it is healthy? You need Botanic Beam in your life, the #1 app for plant moms & plant dads. Download our iOS app or Google Android app today!

Causes of Sunscald on Plants

Sunscald can occur due to various reasons, including:

• Sudden exposure to direct sunlight, especially for plants that are accustomed to low-light conditions.

• Insufficient acclimation to outdoor conditions, leading to shock and damage.

• Inadequate shading or protection from intense sunlight.

Get The Botanic Beam App Today!

With just a snap, unveil the mysteries of your green companions. Discover their secrets, learn their names, and embrace the magic of expert care tips and hidden tricks for lush, thriving growth.

Botanic Beam App
Botanic Beam App

• Poor air circulation, which can exacerbate the effects of sunscald.

• Overwatering, which can make plants more susceptible to sunscald.

Symptoms of Sunscald on Plants

The symptoms of sunscald can vary depending on the severity of the damage. Common signs include:

• White or yellowish patches or blisters on the leaves.

• Wilting or droopy leaves.

• Discoloration, such as brown or black spots, on the leaves or stems.

• Crispy or brittle leaves that are prone to breaking.

• Reduced growth or stunted development.

How to Identify Sunscald on Your Plant

To identify sunscald on your plant, inspect the leaves and stems carefully. Look for any unusual discoloration, patches, or blisters. Gently touch the affected areas to check for any signs of softening or brittleness. If you notice any of these symptoms, it's essential to take immediate action to prevent further damage.

How to Fix Sunscald on Your Plant

To fix sunscald on your plant, follow these steps:

• Move the plant to a shadier location, or provide shade using a sheer curtain or shade cloth.

• Prune damaged leaves or stems to prevent the spread of disease and encourage new growth.

• Adjust your watering schedule to ensure the soil is consistently moist but not waterlogged.

• Improve air circulation around the plant by increasing the distance between plants or using a fan.

• Apply a balanced fertilizer to promote healthy growth and recovery.

Preventing Sunscald on Your Plant

Prevention is always better than cure when it comes to sunscald. To prevent sunscald on your plant, follow these tips:

• Gradually acclimate your plant to outdoor conditions over a period of 7-10 days.

• Choose a location with filtered or dappled sunlight, especially for plants that require low-light conditions.

• Use a UV-filtering window film or shade cloth to reduce the intensity of direct sunlight.

• Monitor your plant's temperature and humidity levels to ensure they are within the recommended range.

• Avoid overwatering, and ensure the soil drains well to prevent waterlogged soil.

Common Plants That Are Prone to Sunscald

Some plants are more susceptible to sunscald than others. These include:

• Ferns and peace lilies, which prefer low-light conditions.

• Succulents and cacti, which can be sensitive to intense sunlight.

• African violets and begonias, which require filtered sunlight.

• Herbs like basil and mint, which can be scorched by direct sunlight.

Sunscald is a common problem that can affect any plant, but with proper care and attention, you can prevent and fix it. By understanding the causes, symptoms, and remedies for sunscald, you can keep your plants healthy and thriving. Remember to monitor your plant's condition regularly, and take prompt action if you notice any signs of sunscald. With the right care, your plants will flourish, and you'll enjoy the many benefits of indoor gardening.

Frequently Asked Questions

What is sunscald on a plant?

Sunscald on a plant, also known as sunburn or scorch, is a common problem that occurs when a plant is exposed to intense direct sunlight, especially if it's not accustomed to it. This can cause damage to the plant's leaves, stems, and flowers, leading to discoloration, blisters, and even death.

What are the symptoms of sunscald on a plant?

The symptoms of sunscald on a plant can vary depending on the severity of the damage, but common signs include white or brown blisters on the leaves, yellowing or browning of the leaves, wilting, and a soft, mushy texture. In severe cases, the plant may drop its leaves or flowers.

How do I know if my plant has sunscald?

Check your plant for any of the symptoms mentioned above. If you notice any unusual changes in the appearance or texture of the leaves, stems, or flowers, it's possible that your plant has sunscald. Inspect the plant carefully, and if you're still unsure, consult with a gardening expert or take the plant to a nursery for further diagnosis.

What causes sunscald on a plant?

Sunscald on a plant is typically caused by sudden exposure to intense direct sunlight, especially if the plant is not acclimated to it. This can happen when a plant is moved from a low-light area to a bright, sunny spot, or when the seasons change and the sun becomes stronger. Other factors, such as temperature fluctuations, dry soil, and poor air circulation, can also contribute to sunscald.

How can I prevent sunscald on my plants?

To prevent sunscald, make sure to gradually acclimate your plants to direct sunlight, especially if they're not used to it. Start by providing filtered or dappled light, and gradually increase the duration and intensity of the sunlight over time. Also, ensure your plants are well-watered, fertilized, and receive good air circulation to help them tolerate the sun's rays.

Can sunscald be treated?

Yes, sunscald can be treated, but the success of treatment depends on the severity of the damage. Mild cases of sunscald may respond to simple remedies like pruning, watering, and providing shade. More severe cases may require more extensive treatment, such as repotting the plant in a shadier location, using a sunblock or sunscreen, or applying a topical treatment to the affected areas.

How do I treat sunscald on my plant?

Treatment for sunscald typically involves a combination of the following steps: prune any damaged leaves or stems, provide shade to prevent further damage, water the plant thoroughly to replenish moisture, and fertilize the plant to promote healthy growth. In severe cases, you may need to repot the plant in a shadier location or use a sunblock or sunscreen to protect the plant from further damage.

Will my plant recover from sunscald?

The prognosis for a plant with sunscald depends on the severity of the damage. If caught early, most plants can recover from mild cases of sunscald with proper treatment. However, more severe cases may result in permanent damage or even death. It's essential to monitor your plant's progress closely and adjust your treatment strategy as needed.

How long does it take for a plant to recover from sunscald?

The recovery time for a plant with sunscald varies depending on the severity of the damage and the effectiveness of treatment. Mild cases may resolve within a few days to a week, while more severe cases may take several weeks or even months to recover. Be patient, and with proper care, your plant should eventually recover.

Can I prevent sunscald on seedlings?

Yes, you can prevent sunscald on seedlings by providing them with filtered or dappled light, especially during the first few weeks after germination. As the seedlings grow, you can gradually increase the duration and intensity of the sunlight. Also, make sure to keep the soil consistently moist and fertilize the seedlings regularly to promote healthy growth.

Why do my plants get sunscald in the winter?

Plants can get sunscald in the winter due to the low angle of the sun, which can cause intense direct sunlight to stream through windows or glass doors. This can be especially problematic for plants that are not acclimated to direct sunlight. To prevent winter sunscald, provide shade for your plants during the winter months, or move them to a shadier location.

Can I use a sunblock or sunscreen on my plants?

Yes, you can use a sunblock or sunscreen on your plants to protect them from sunscald. There are various products available on the market specifically designed for plants, or you can use a homemade solution like a mixture of water and kaolin clay. Apply the sunblock or sunscreen according to the product's instructions or recipe.

How often should I water my plant with sunscald?

Water your plant with sunscald thoroughly, but make sure not to overwater. Check the soil daily, and water only when the top inch of soil feels dry to the touch. Overwatering can exacerbate the damage and lead to root rot.

Can I fertilize my plant with sunscald?

Yes, you can fertilize your plant with sunscald, but wait until the plant has started to recover and show signs of new growth. Use a balanced, water-soluble fertilizer at half the recommended strength to avoid burning the roots.

Will pruning help my plant recover from sunscald?

Yes, pruning can help your plant recover from sunscald by removing damaged leaves or stems and promoting healthy growth. Prune only the affected areas, and make clean cuts just above a node to encourage new growth.

Can I move my plant outside after it's recovered from sunscald?

Yes, you can move your plant outside after it's recovered from sunscald, but make sure to acclimate it gradually to outdoor conditions. Start by moving the plant to a shaded area outdoors and gradually increase the duration and intensity of direct sunlight over time.

How can I protect my plant from sunscald in the future?

To protect your plant from sunscald in the future, provide filtered or dappled light, especially during peak sun hours. Use a sheer curtain or shade cloth to filter the sun's rays, and consider using a sunblock or sunscreen on your plant. Also, ensure your plant is well-watered, fertilized, and receives good air circulation to help it tolerate the sun's rays.

Is sunscald contagious?

No, sunscald is not contagious and cannot be spread from one plant to another. It's a physical response to environmental stress, and each plant must be treated individually.

Can I use a humidifier to help my plant recover from sunscald?

Yes, using a humidifier can help your plant recover from sunscald by maintaining a humid environment that promotes healthy growth. However, make sure not to over-humidify, as this can lead to root rot and other problems.

Will sunscald affect my plant's ability to bloom?

Sunscald can affect your plant's ability to bloom, especially if the damage is severe. However, with proper treatment and care, your plant should eventually recover and produce flowers again.

Can I use a fan to help my plant recover from sunscald?

Yes, using a fan can help your plant recover from sunscald by improving air circulation and reducing heat stress. However, make sure to position the fan so that it doesn't blow directly on the plant, which can cause further damage.

How can I prevent sunscald on my succulents?

Succulents are particularly prone to sunscald, so it's essential to provide them with filtered or dappled light, especially during peak sun hours. Use a sheer curtain or shade cloth to filter the sun's rays, and consider using a sunblock or sunscreen on your succulents. Also, ensure your succulents are well-watered, fertilized, and receive good air circulation to help them tolerate the sun's rays.

Get The Botanic Beam App Today!

With just a snap, unveil the mysteries of your green companions. Discover their secrets, learn their names, and embrace the magic of expert care tips and hidden tricks for lush, thriving growth.

Botanic Beam App
Botanic Beam App

Indoor Plant Care A-Z