What Causes Evergreen Plant Leaves to Curl?

Evergreen plants are a great addition to any garden because they provide year-round color and interest. However, when the leaves start to curl, it can be a sign of an underlying problem. In this article, we will explore the different reasons why evergreen plant leaves curl and what you can do about it.

Lack of Water

One of the most common reasons why evergreen plant leaves curl is due to a lack of water. Evergreens need consistent moisture to thrive, especially during the hot summer months. If the soil around your evergreen is dry, the leaves will begin to curl inward to conserve moisture.

To fix this issue, make sure to water your evergreens deeply and regularly. Aim to water at the base of the plant rather than from above as this will ensure that the water reaches the roots where it is needed most.

Overwatering

While not enough water can cause curling leaves, so can too much water. Overwatering can lead to root rot, which can cause the leaves to curl and turn yellow or brown. Additionally, overwatered evergreens are more susceptible to pest infestations and diseases.

To avoid overwatering your evergreens, make sure to check the soil moisture level before watering. Stick your finger into the soil about an inch deep – if it feels moist, wait a few days before watering again.

Pest Infestation

Another reason why evergreen plant leaves may curl is due to a pest infestation. Common pests that affect evergreens include spider mites, scale insects, and aphids. These insects feed on the sap of the plant, which can cause the leaves to curl or become distorted.

To get rid of pests on your evergreens, use an insecticidal soap or neem oil spray. You can also use a high-pressure hose to wash off any visible pests.

Fungal Diseases

Fungal diseases can also cause evergreen plant leaves to curl. For example, needle blight is a fungal disease that affects the needles of evergreen trees. The needles will turn brown or yellow and curl up, eventually falling off the tree.

To prevent fungal diseases, make sure to prune any infected branches and dispose of them properly. Additionally, avoid overhead watering as this can spread fungal spores from one plant to another.

Nutrient Deficiency

Evergreens need specific nutrients to grow and thrive. If your evergreen plant is lacking in certain nutrients, it can cause the leaves to curl or become discolored. For example, nitrogen deficiency can cause the leaves to turn yellow and curl up.

To fix a nutrient deficiency, you may need to fertilize your evergreen plant. Use a slow-release fertilizer that is specifically formulated for evergreens.

Environmental Factors

Finally, environmental factors such as extreme heat or cold can cause evergreen plant leaves to curl. If the temperature drops too low, the leaves may curl up to protect themselves from the cold. Similarly, if it gets too hot, the leaves may curl up to conserve moisture.

Unfortunately, there isn’t much you can do about environmental factors other than ensuring your evergreens are planted in an appropriate location for their needs.

FAQ

How do I know if my evergreen needs water?

The best way to determine if your evergreen needs water is to check the soil moisture level. Stick your finger into the soil about an inch deep – if it feels dry, it’s time to water.

How often should I water my evergreen?

The frequency of watering your evergreen will depend on several factors such as the type of plant and the weather conditions. However, as a general rule, aim to water deeply once a week during the growing season.

Can I save my evergreen if the leaves have already started to curl?

If the leaves of your evergreen have already started to curl, the best thing you can do is identify the underlying cause and address it. For example, if the soil is dry, water your plant deeply. If there is a pest infestation, use an insecticidal soap or neem oil spray.

Can over-fertilizing cause evergreen leaves to curl?

Yes, over-fertilizing can cause evergreen leaves to curl. Too much fertilizer can lead to nutrient burn, which can cause the leaves to become discolored and curl up.

How do I prevent fungal diseases in my evergreens?

To prevent fungal diseases, make sure to prune any infected branches and dispose of them properly. Additionally, avoid overhead watering as this can spread fungal spores from one plant to another.