Troubleshooting
Begonia 'Red Robin' problems — and how to fix them
Begonia 'Red Robin' (Begonia rex-cultorum 'Red Robin') 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
Rex begonias mildew in still, humid air. Provide airflow, keep foliage dry, and remove infected leaves.
Leaf scorch
Direct sun fades and crisps the red leaves. Move to bright indirect light.
Rhizome rot
Overwatering or a buried rhizome causes soft black rot. Keep the rhizome surface-set and let the topsoil dry between waterings.
Faded leaf colour
Too little light mutes the rosy-red pigment. Move to brighter indirect light to restore the tones.
Prevent begonia 'red robin' problems before they start
Most begonia 'red robin' issues are care-mismatch, not bad luck. Dial in the basics:
- Common rex begonia problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Begonia 'Red Robin' watering schedule
- Begonia 'Red Robin' light requirements
- Best soil mix for begonia 'red robin'
- Begonia 'Red Robin' temperature & humidity
- Full begonia 'red robin' care guide
Looking for the species overview? Begonia — the full care guide.
Begonia 'Red Robin' problems — FAQ
Why is my begonia 'red robin' powdery mildew?
Rex begonias mildew in still, humid air. Provide airflow, keep foliage dry, and remove infected leaves.
Why is my begonia 'red robin' leaf scorch?
Direct sun fades and crisps the red leaves. Move to bright indirect light.
Why is my begonia 'red robin' rhizome rot?
Overwatering or a buried rhizome causes soft black rot. Keep the rhizome surface-set and let the topsoil dry between waterings.
Why is my begonia 'red robin' faded leaf colour?
Too little light mutes the rosy-red pigment. Move to brighter indirect light to restore the tones.