Troubleshooting
Wavy Begonia problems — and how to fix them
Wavy Begonia (Begonia undulata) 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.
Lower leaf drop
Older leaves on the lower canes yellow and drop — a natural process if limited to the lowest few leaves, but rapid loss across the plant signals drought stress, root rot, or a sudden drop in temperature.
Mealybugs
White waxy clusters appear in leaf axils and on the undersides of leaves; treat by dabbing with isopropyl alcohol on a cotton bud, then apply an insecticidal soap spray to the whole plant.
Prevent wavy begonia problems before they start
Most wavy begonia issues are care-mismatch, not bad luck. Dial in the basics:
Wavy Begonia problems — FAQ
Why is my wavy begonia lower leaf drop?
Older leaves on the lower canes yellow and drop — a natural process if limited to the lowest few leaves, but rapid loss across the plant signals drought stress, root rot, or a sudden drop in temperature.
Why is my wavy begonia mealybugs?
White waxy clusters appear in leaf axils and on the undersides of leaves; treat by dabbing with isopropyl alcohol on a cotton bud, then apply an insecticidal soap spray to the whole plant.