Updated: May 12, 2022

Eucalyptus plants are highly valued for their aromatic scent, beautiful foliage, and medicinal properties. These trees are native to Australia but can be found in other parts of the world, including the United States. However, eucalyptus plant owners often notice that the leaves of their trees curl up, which can be concerning. In this article, we will explore the reasons behind this phenomenon and how to prevent it from happening.

Environmental Factors

Insufficient Watering

Eucalyptus plants require a lot of water to grow properly. If the soil is too dry or if the plant is not receiving enough water, the leaves will start to curl up. To prevent this from happening, make sure to water your eucalyptus plant frequently, especially during hot and dry weather.

High Temperatures

Eucalyptus plants are native to warm climates and can tolerate high temperatures. However, if the temperature gets too high, the leaves will curl up as a defense mechanism to reduce water loss. Make sure to keep your eucalyptus plant in a shaded area during hot weather, or if you live in an area with extreme heat waves.

Low Humidity

Eucalyptus plants prefer a humid environment with plenty of moisture in the air. If the air is too dry, the leaves will curl up as a way to conserve water. To prevent this from happening, you can mist your eucalyptus plant regularly or keep it in a room with a humidifier.

Pests and Diseases

Spider Mites

Spider mites are common pests that can infest eucalyptus plants. These tiny insects attach themselves to the leaves and suck out the sap, causing the leaves to curl up and turn yellow. To get rid of spider mites, you can spray your eucalyptus plant with a mixture of water and dish soap or use a pesticide specifically designed for spider mites.

Powdery Mildew

Powdery mildew is a fungal disease that can affect eucalyptus plants. This disease causes a white powdery substance to appear on the leaves, which can cause them to curl up and turn brown. To prevent powdery mildew, make sure to keep your eucalyptus plant in a well-ventilated area and avoid overhead watering.

Nutrient Deficiencies

Iron Deficiency

Iron deficiency is a common problem for eucalyptus plants, especially those grown in alkaline soils. This deficiency causes the leaves to turn yellow and curl up. To correct this problem, you can apply iron chelate to the soil or use an acidic fertilizer.

Nitrogen Deficiency

Nitrogen is essential for plant growth and development. If your eucalyptus plant is not receiving enough nitrogen, the leaves will start to turn yellow and curl up. To prevent nitrogen deficiency, you can apply a nitrogen-rich fertilizer to the soil.


Can eucalyptus plant leaves uncurl on their own?

Yes, if the cause of the leaf curling is environmental, such as insufficient watering or high temperatures, the leaves will uncurl on their own once the issue has been resolved.

Can eucalyptus plants recover from spider mite infestations?

Yes, with proper treatment, eucalyptus plants can recover from spider mite infestations. It is important to remove any affected leaves and spray the plant with a pesticide specifically designed for spider mites.

How often should I fertilize my eucalyptus plant?

Eucalyptus plants should be fertilized every two to three months during the growing season. Make sure to use a fertilizer that is specifically designed for eucalyptus plants.

Can eucalyptus plants be grown indoors?

Yes, eucalyptus plants can be grown indoors as long as they are placed in a well-lit area with plenty of sunlight. However, they may not grow as large as outdoor eucalyptus trees.

In conclusion, eucalyptus plant leaves curling up can be caused by a variety of environmental factors, pests and diseases, or nutrient deficiencies. By understanding the reasons behind this phenomenon and taking preventive measures, you can ensure that your eucalyptus plant stays healthy and vibrant.