Troubleshooting
Sharp-leaf Columnea problems — and how to fix them
Sharp-leaf Columnea (Columnea arguta) 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
Caused by waterlogged compost; remove affected roots, allow to dry briefly, and repot in a fresh free-draining epiphytic mix with improved drainage.
Spider mites
Low humidity encourages fine webbing and stippled, dull leaves; raise humidity above 60% and treat with insecticidal soap or a dilute neem spray, covering all leaf surfaces.
Prevent sharp-leaf columnea problems before they start
Most sharp-leaf columnea issues are care-mismatch, not bad luck. Dial in the basics:
Sharp-leaf Columnea problems — FAQ
Why is my sharp-leaf columnea root rot?
Caused by waterlogged compost; remove affected roots, allow to dry briefly, and repot in a fresh free-draining epiphytic mix with improved drainage.
Why is my sharp-leaf columnea spider mites?
Low humidity encourages fine webbing and stippled, dull leaves; raise humidity above 60% and treat with insecticidal soap or a dilute neem spray, covering all leaf surfaces.