Troubleshooting
Begonia 'Selph's Mahogany' problems — and how to fix them
Begonia 'Selph's Mahogany' (Begonia 'Selph's Mahogany') 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.
Rhizome rot
Overwatering or burying the rhizome causes rot. Keep the rhizome at the surface, use airy mix, and let the surface dry between waterings.
Browning leaf edges
Low humidity or feed salts. Raise humidity and feed sparingly, flushing the soil occasionally.
Powdery mildew
Humid, still air invites mildew. Improve airflow and keep the fuzzy leaves dry when watering.
Leggy, faded growth
Too little light stretches stems and dulls the dark colour. Move to brighter indirect light.
Prevent begonia 'selph's mahogany' problems before they start
Most begonia 'selph's mahogany' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for the species overview? Begonia — the full care guide.
Begonia 'Selph's Mahogany' problems — FAQ
Why is my begonia 'selph's mahogany' rhizome rot?
Overwatering or burying the rhizome causes rot. Keep the rhizome at the surface, use airy mix, and let the surface dry between waterings.
Why is my begonia 'selph's mahogany' browning leaf edges?
Low humidity or feed salts. Raise humidity and feed sparingly, flushing the soil occasionally.
Why is my begonia 'selph's mahogany' powdery mildew?
Humid, still air invites mildew. Improve airflow and keep the fuzzy leaves dry when watering.
Why is my begonia 'selph's mahogany' leggy, faded growth?
Too little light stretches stems and dulls the dark colour. Move to brighter indirect light.