Powdery Mildew on Indoor Plants

March 12, 2019

Powdery mildew is a fungal disease with fuzzy white growth. It spreads quickly, covering foliage and blocking photosynthesis, causing leaves to yellow and drop. Zinnia are particularly susceptible to powdery mildew.

Powdery mildew on zinnia leaves.
PC: Leslie F. Halleck

Cull the herd if you have a pest or disease outbreak among your indoor plants. Consider removing any heavily infested plants in order to limit the impact on less affected plants.

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