Troubleshooting
Bedding Begonia problems — and how to fix them
Bedding Begonia (Begonia semperflorens) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Stem and root rot
Overwatering or poor drainage collapses the succulent stems; let soil dry slightly and ensure pots drain freely.
Powdery mildew / botrytis
White mildew or grey mould in damp, crowded plantings; improve airflow, avoid overhead watering and remove affected leaves.
Leaf scorch
Green-leaved types bleach and brown in harsh midday sun; move to dappled light or part shade in hot climates.
Cold damage
Frost-tender; even a light chill blackens foliage, so plant out only after all frost risk has passed.
Prevent bedding begonia problems before they start
Most bedding begonia issues are care-mismatch, not bad luck. Dial in the basics:
Looking for bedding begonia in general rather than its problems? Read the full bedding begonia care guide — light, water, soil and feeding.
Bedding Begonia problems — FAQ
Why is my bedding begonia stem and root rot?
Overwatering or poor drainage collapses the succulent stems; let soil dry slightly and ensure pots drain freely.
Why is my bedding begonia powdery mildew / botrytis?
White mildew or grey mould in damp, crowded plantings; improve airflow, avoid overhead watering and remove affected leaves.
Why is my bedding begonia leaf scorch?
Green-leaved types bleach and brown in harsh midday sun; move to dappled light or part shade in hot climates.
Why is my bedding begonia cold damage?
Frost-tender; even a light chill blackens foliage, so plant out only after all frost risk has passed.