Troubleshooting
Begonia 'Marmaduke' problems — and how to fix them
Begonia 'Marmaduke' (Begonia 'Marmaduke') 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.
Powdery mildew
Common on begonias in still, humid air; improve ventilation, keep leaves dry, and remove infected foliage.
Rhizome rot
Soft, blackening rhizome from overwatering or a buried crown; use airy mix, keep the rhizome surfaced, and let the top dry out between waterings.
Leaf scorch
Pale or crispy bleached patches indicate direct sun; relocate to bright indirect light.
Botrytis on flowers/leaves
Grey fuzzy mould in cool damp conditions; remove spent blooms and affected tissue and improve airflow.
Prevent begonia 'marmaduke' problems before they start
Most begonia 'marmaduke' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for begonia 'marmaduke' in general rather than its problems? Read the full begonia 'marmaduke' care guide — light, water, soil and feeding.
Begonia 'Marmaduke' problems — FAQ
Why is my begonia 'marmaduke' powdery mildew?
Common on begonias in still, humid air; improve ventilation, keep leaves dry, and remove infected foliage.
Why is my begonia 'marmaduke' rhizome rot?
Soft, blackening rhizome from overwatering or a buried crown; use airy mix, keep the rhizome surfaced, and let the top dry out between waterings.
Why is my begonia 'marmaduke' leaf scorch?
Pale or crispy bleached patches indicate direct sun; relocate to bright indirect light.
Why is my begonia 'marmaduke' botrytis on flowers/leaves?
Grey fuzzy mould in cool damp conditions; remove spent blooms and affected tissue and improve airflow.