Troubleshooting
Variegated-Colour Begonia problems — and how to fix them
Variegated-Colour Begonia (Begonia versicolor) 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.
Crown and rhizome rot
The most common cause of death; water pooling on or near the rhizome in cool or stagnant conditions rapidly leads to soft, brown, foul-smelling rot. Water at the pot edge only and ensure excellent drainage.
Powdery mildew
White powdery coating on the ornamental leaf surface occurs in humid but still air; improve ventilation within the terrarium (use a small fan), remove affected leaves, and apply a potassium bicarbonate spray if needed.
Prevent variegated-colour begonia problems before they start
Most variegated-colour begonia issues are care-mismatch, not bad luck. Dial in the basics:
Variegated-Colour Begonia problems — FAQ
Why is my variegated-colour begonia crown and rhizome rot?
The most common cause of death; water pooling on or near the rhizome in cool or stagnant conditions rapidly leads to soft, brown, foul-smelling rot. Water at the pot edge only and ensure excellent drainage.
Why is my variegated-colour begonia powdery mildew?
White powdery coating on the ornamental leaf surface occurs in humid but still air; improve ventilation within the terrarium (use a small fan), remove affected leaves, and apply a potassium bicarbonate spray if needed.