White Spots on African Violet Flowers Only: Likely Botrytis Fungus

A workplace African violet in a north window developed white spots only on blooms (leaves healthy, constant blooming). Home plants in east window with fertilizer had no spots.

Three Possibilities

1. Powdery mildew: Usually on leaves too; treat with 1:9 milk-water
2. Foliar mealybugs: Usually on leaves; remove with alcohol Q-tip
3. Botrytis (gray mold): Flower-specific fungus; spores spread to other plants

Botrytis Protocol

Remove ALL affected flowers immediately. Isolate plant. Watch next bloom cycle. If spots return, discard plant—fungicide (Benomyl) costs more than replacement. Prevent spread to collection.

Environmental Factor

North window may be too cool/damp, favoring Botrytis. East window with fertilizer at home was healthier.