Troubleshooting
Begonia 'U491' problems — and how to fix them
Begonia 'U491' (Begonia 'U491') 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 and crown rot
Soggy soil or a wet crown rots the surface rhizome. Let the surface dry between waterings and never leave it standing in water.
Powdery mildew
White patches develop in stagnant, humid air. Improve airflow, keep leaves dry, and remove affected foliage.
Leaf scorch and fading
Direct sun bleaches the patterned leaves. Move to bright indirect light to restore contrast and texture.
Brown leaf edges
Low humidity or fertiliser-salt build-up browns the margins. Raise humidity and flush the soil periodically.
Prevent begonia 'u491' problems before they start
Most begonia 'u491' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for the species overview? Begonia — the full care guide.
Begonia 'U491' problems — FAQ
Why is my begonia 'u491' rhizome and crown rot?
Soggy soil or a wet crown rots the surface rhizome. Let the surface dry between waterings and never leave it standing in water.
Why is my begonia 'u491' powdery mildew?
White patches develop in stagnant, humid air. Improve airflow, keep leaves dry, and remove affected foliage.
Why is my begonia 'u491' leaf scorch and fading?
Direct sun bleaches the patterned leaves. Move to bright indirect light to restore contrast and texture.
Why is my begonia 'u491' brown leaf edges?
Low humidity or fertiliser-salt build-up browns the margins. Raise humidity and flush the soil periodically.