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What Causes Dumbcane Delilah Plant Leaves to Curl?

Updated: June 13, 2022

Dumbcane Delilah, also known as Dieffenbachia seguine or Dumb Cane, is a popular houseplant known for its beautiful foliage. The plant has large, lush green leaves that add a touch of natural beauty to any room. However, one common problem that many gardeners face with this plant is when its leaves start to curl. The curling of leaves can be a sign of various issues, and it’s essential to understand the underlying cause to take prompt, appropriate action to save the plant.

Environmental Factors

Environmental factors are the most common cause of leaf curling in Dumbcane Delilah plants. Changes in temperature, humidity, and lighting can all cause the leaves to curl up. Some of the environmental factors that can cause leaf curling include:


Dumbcane Delilah plants thrive in temperatures between 60 and 75 degrees Fahrenheit. If the temperature falls below 60 degrees, the plant may start to curl its leaves as a protective mechanism. Alternatively, if the temperature rises above 75 degrees, the plant may become dehydrated and wilt.


Dumbcane Delilah plants prefer high levels of humidity. If the air is too dry, the plant may curl its leaves to conserve moisture. To increase humidity levels around your plant, place a humidifier nearby or mist the leaves with water regularly.


Dumbcane Delilah plants require bright but indirect light to grow well. If you expose your plant to direct sunlight for an extended period, it may get sunburned and start to curl its leaves. On the other hand, if your plant gets insufficient light, it may curl its leaves to protect itself from dehydration.

Pests and Diseases

Pests and diseases can also cause leaf curling in Dumbcane Delilah plants. Here are some of the most common pests and diseases that can affect these plants:

Spider Mites

Spider mites are tiny, sap-sucking insects that can cause significant damage to your Dumbcane Delilah plant. They can cause the leaves to curl, turn yellow, and eventually fall off. If you suspect your plant has spider mites, isolate it immediately and treat it with insecticidal soap.

Root Rot

Root rot is a fungal disease that affects the roots of plants grown in damp conditions for an extended period. The fungus attacks the roots, making it challenging for the plant to absorb water and nutrients from the soil. As a result, the leaves may start to curl or wilt. To treat root rot, remove the plant from the soil, trim away any affected roots, and replant it in fresh soil.

Nutrient Deficiencies

Another reason why your Dumbcane Delilah’s leaves may be curling up is nutrient deficiencies. The plant requires specific nutrients to grow healthy foliage. Lack of these nutrients can lead to stunted growth and curling of leaves. The most common nutrient deficiencies that affect Dumbcane Delilah plants include:


Nitrogen is an essential nutrient for plant growth and development. If your Dumbcane Delilah plant lacks nitrogen, its leaves may turn yellow and start to curl.


Calcium deficiency in Dumbcane Delilah plants can cause deformed and curled leaves. This issue is particularly common in plants grown in acidic soils.


In summary, leaf curling in Dumbcane Delilah plants can be caused by various factors such as environmental factors, pests and diseases, and nutrient deficiencies. Identifying the underlying cause of leaf curling is crucial to save your plant from further damage.


My Dumbcane Delilah plant’s leaves are curling. What should I do?

Check your plant for pests and diseases, ensure it is getting enough light and humidity, and that the temperature is within the appropriate range. If you suspect nutrient deficiencies, fertilize your plant with a balanced fertilizer.

Can overwatering cause leaf curling in Dumbcane Delilah plants?

Yes, overwatering can cause root rot, which can lead to leaf curling.

Can Dumbcane Delilah plants recover from leaf curling?

Yes, in most cases, Dumbcane Delilah plants can recover from leaf curling if you identify the underlying cause and take prompt action to address it.

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