Troubleshooting
Crazy-leaf Begonia problems — and how to fix them
Crazy-leaf Begonia (Begonia phyllomaniaca) 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.
Botrytis grey mould
The naturally dense, ruffled growth restricts air circulation, making B. phyllomaniaca particularly susceptible to Botrytis cinerea. Remove damaged or dead plant tissue regularly, space it away from neighbouring plants, and keep humidity high through a humidifier rather than misting.
Overly dense growth / stem collapse
The prolific production of adventitious plantlets can become so dense that inner stems are shaded out and collapse. Thin out overcrowded stems in spring, removing weaker shoots to allow light and air into the centre of the plant.
Mealybugs
The packed, frilled stems create ideal hiding spots for mealybugs. Inspect the plant regularly, especially in the crevices between the adventitious shoots. Treat with isopropyl alcohol on a cotton bud or neem-oil spray applied to all surfaces.
Prevent crazy-leaf begonia problems before they start
Most crazy-leaf begonia issues are care-mismatch, not bad luck. Dial in the basics:
Crazy-leaf Begonia problems — FAQ
Why is my crazy-leaf begonia botrytis grey mould?
The naturally dense, ruffled growth restricts air circulation, making B. phyllomaniaca particularly susceptible to Botrytis cinerea. Remove damaged or dead plant tissue regularly, space it away from neighbouring plants, and keep humidity high through a humidifier rather than misting.
Why is my crazy-leaf begonia overly dense growth / stem collapse?
The prolific production of adventitious plantlets can become so dense that inner stems are shaded out and collapse. Thin out overcrowded stems in spring, removing weaker shoots to allow light and air into the centre of the plant.
Why is my crazy-leaf begonia mealybugs?
The packed, frilled stems create ideal hiding spots for mealybugs. Inspect the plant regularly, especially in the crevices between the adventitious shoots. Treat with isopropyl alcohol on a cotton bud or neem-oil spray applied to all surfaces.