Troubleshooting
Red Kohleria problems — and how to fix them
Red Kohleria (Kohleria eriantha) 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.
Aphid infestations on new growth
Confirmed RHS susceptibility; aphid colonies cluster on soft stem tips and flower buds, causing distorted growth and sticky honeydew — treat early with insecticidal soap or a blast of water, then follow up with a systemic houseplant insecticide if needed.
Rhizome rot from overwatering
Overwatering, especially in winter when the plant is semi-dormant, causes the rhizomes to blacken and decay; always let the top of the compost dry slightly before watering and ensure the pot has drainage holes that are not blocked.
Prevent red kohleria problems before they start
Most red kohleria issues are care-mismatch, not bad luck. Dial in the basics:
Red Kohleria problems — FAQ
Why is my red kohleria aphid infestations on new growth?
Confirmed RHS susceptibility; aphid colonies cluster on soft stem tips and flower buds, causing distorted growth and sticky honeydew — treat early with insecticidal soap or a blast of water, then follow up with a systemic houseplant insecticide if needed.
Why is my red kohleria rhizome rot from overwatering?
Overwatering, especially in winter when the plant is semi-dormant, causes the rhizomes to blacken and decay; always let the top of the compost dry slightly before watering and ensure the pot has drainage holes that are not blocked.