Indoor Plant Diseases

Overwatering is the most common problem leading to problems with houseplants in the winter.

Abnormal green or yellow streaks, rings, or patches and distorted growth are symptoms of viruses of houseplants.

Cankers or lesions on stem can be caused by fungal and bacterial pathogens.

Yellowing, browning, and dieback of houseplant leaves may be symptoms of root rot or crown rot.

A white powdery coating on the surfaces of houseplant leaves and stems is a symptom of powdery mildew.

Gray to tan areas on older leaves or spent flowers are symptoms of gray mold on houseplants.

Bacterial disease symptoms on houseplants range from black to brown, often watery leaf spots or lesions to total collapse of plant tissue.

How to identify and manage symptoms of fungal leaf spot diseases on houseplants.

What to do if you see algae or fungus growing on top of potting media in houseplants.