Glossary

Plant problems A–Z

Common houseplant and garden diseases, symptoms, and pests — with photos and treatment steps. Updated regularly.

Symptom

Yellow leaves

Seven causes: overwatering, underwatering, light, nutrients, root rot, sunburn, natural aging.

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 Disease

Powdery mildew

White powdery coating on leaves caused by Erysiphales fungi. Spreads via airborne spores.

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 Symptom

Brown leaf tips

Low humidity, fluoride, salt buildup, underwatering, or fertilizer burn. The pattern narrows it down.

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