Troubleshooting
Even-stamen Columnea problems — and how to fix them
Even-stamen Columnea (Columnea isandrantha) 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.
Root rot
The most serious risk for this genus: overwatering or compacted compost causes rapid root and stem base decay — always use a very open free-draining mix and allow the top layer to partially dry before rewatering.
Mealybugs
White waxy colonies accumulate in leaf axils and at stem nodes; treat by dabbing individual colonies with isopropyl alcohol on a cotton swab, then apply insecticidal soap spray weekly until completely clear.
Prevent even-stamen columnea problems before they start
Most even-stamen columnea issues are care-mismatch, not bad luck. Dial in the basics:
Even-stamen Columnea problems — FAQ
Why is my even-stamen columnea root rot?
The most serious risk for this genus: overwatering or compacted compost causes rapid root and stem base decay — always use a very open free-draining mix and allow the top layer to partially dry before rewatering.
Why is my even-stamen columnea mealybugs?
White waxy colonies accumulate in leaf axils and at stem nodes; treat by dabbing individual colonies with isopropyl alcohol on a cotton swab, then apply insecticidal soap spray weekly until completely clear.