White Fungus on House Plants

Written by tracy hodge
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White Fungus on House Plants
Houseplants often suffer from a white fungus known as powdery mildew. (Jupiterimages/Photos.com/Getty Images)

People often enjoy placing plants in their homes or offices. However, houseplants can suffer from diseases which affect the appearance of the plant. White fungus on indoor plants often signals a fungal disease.


Houseplants suffering from a white, fungal growth often suffer from powdery mildew. This disease is caused by the fungus Oidium and commonly affects houseplants, especially African violet and grape ivy, states North Dakota State University. Plants growing in areas of high humidity, such as the bathroom, often contract this fungal disease. White fungus on plant soil indicates a saprophytic soil fungus that exists on dead plant tissue.


Powdery mildew causes a white fungal coating on flowers, leaves, buds and stems of indoor plants that is easily rubbed off. Shoots are often deformed as a result of this disease. Powdery mildew is usually not harmful to houseplants, but it is unsightly. Soil fungus presents as a white or yellow growth that resembles mould and is not harmful to houseplants.


Control of powdery mildew is best accomplished by removing and destroying diseased houseplant leaves. Avoid misting plant leaves frequently, especially if symptoms are present. Overwatering causes soil fungus, so reducing the frequency in which plants are watered reduces fungal development.

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