Troubleshooting
Red-Silk Begonia problems — and how to fix them
Red-Silk Begonia (Begonia rufosericea) is generally low-drama, 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 silky leaf indumentum holds moisture and spores readily; increase airflow, remove affected tissue promptly, and water only at soil level.
Root rot from overwatering
Rhizomatous roots are very susceptible to Pythium and Phytophthora in wet compost; always allow the top layer to partially dry before re-watering and ensure the pot has drainage holes.
Prevent red-silk begonia problems before they start
Most red-silk begonia issues are care-mismatch, not bad luck. Dial in the basics:
Looking for red-silk begonia in general rather than its problems? Read the full red-silk begonia care guide — light, water, soil and feeding.
Red-Silk Begonia problems — FAQ
Why is my red-silk begonia botrytis (grey mould)?
The silky leaf indumentum holds moisture and spores readily; increase airflow, remove affected tissue promptly, and water only at soil level.
Why is my red-silk begonia root rot from overwatering?
Rhizomatous roots are very susceptible to Pythium and Phytophthora in wet compost; always allow the top layer to partially dry before re-watering and ensure the pot has drainage holes.