Troubleshooting
Scaly-stem Columnea problems — and how to fix them
Scaly-stem Columnea (Columnea lepidocaula) 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.
Mealybugs
White, cottony masses form in leaf axils and along stems. Remove visible mealybugs with a cotton swab dipped in rubbing alcohol, then follow up with insecticidal soap or neem oil spray; repeat weekly for one month.
Bud drop
Flower buds fall before opening when the plant is moved, exposed to cold draughts, or suffers a sudden drop in humidity. Avoid repositioning once buds have formed and keep away from air-conditioning vents.
Prevent scaly-stem columnea problems before they start
Most scaly-stem columnea issues are care-mismatch, not bad luck. Dial in the basics:
Scaly-stem Columnea problems — FAQ
Why is my scaly-stem columnea mealybugs?
White, cottony masses form in leaf axils and along stems. Remove visible mealybugs with a cotton swab dipped in rubbing alcohol, then follow up with insecticidal soap or neem oil spray; repeat weekly for one month.
Why is my scaly-stem columnea bud drop?
Flower buds fall before opening when the plant is moved, exposed to cold draughts, or suffers a sudden drop in humidity. Avoid repositioning once buds have formed and keep away from air-conditioning vents.