Indoor Plant Diseases

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Updated: June 14, 2021

Diagnose Indoor Plant Problems

Symptoms of common houseplant problems.
Updated: May 24, 2021

Winter Indoor Plant Problems

Overwatering is the most common problem leading to problems with houseplants in the winter.
Crown rot on aloe
Updated: March 26, 2021

Algae and Fungal Growth on the Soil of Indoor Plants

What to do if you see algae or fungus growing on top of potting media in houseplants.
Updated: March 26, 2021

Bacterial Leaf Spots on Indoor Plants

Bacterial disease symptoms on houseplants range from black to brown, often watery leaf spots or lesions to total collapse of plant tissue.
Bacterial leaf spot on dracaena
Updated: March 26, 2021

Fungal Leaf Spots on Indoor Plants

How to identify and manage symptoms of fungal leaf spot diseases on houseplants.
Leafspots on orchid leaves
Updated: March 18, 2021

Gray Mold or Botrytis Blight on Indoor Plants

Gray to tan areas on older leaves or spent flowers are symptoms of gray mold on houseplants.
Botrysis blight on begonia
Updated: March 16, 2021

Viruses of Indoor Plants

Abnormal green or yellow streaks, rings, or patches and distorted growth are symptoms of viruses of houseplants.
Virus on impatiens
Updated: March 16, 2021

Stem Cankers of Indoor Plants

Cankers or lesions on stem can be caused by fungal and bacterial pathogens.
Crown rot on aloe
Updated: March 16, 2021

Root Rots of Indoor Plants

Yellowing, browning, and dieback of houseplant leaves may be symptoms of root rot or crown rot.
Primula wilting due to virus or root rot
Updated: March 16, 2021

Powdery Mildew on Indoor Plants

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