Troubleshooting
Indian Coleus problems — and how to fix them
Indian Coleus (Plectranthus barbatus) 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.
Whitefly and aphid infestations
Sap-sucking insects cluster under leaves, causing yellowing and sooty mould; treat promptly with insecticidal soap spray or neem oil, ensuring full leaf coverage top and underside.
Fungal root rot in cold, wet soil
Overwintering plants in cold, damp compost are prone to Pythium and Phytophthora root rots; ensure containers have drainage holes and reduce watering significantly when temperatures drop below 15°C.
Prevent indian coleus problems before they start
Most indian coleus issues are care-mismatch, not bad luck. Dial in the basics:
Indian Coleus problems — FAQ
Why is my indian coleus whitefly and aphid infestations?
Sap-sucking insects cluster under leaves, causing yellowing and sooty mould; treat promptly with insecticidal soap spray or neem oil, ensuring full leaf coverage top and underside.
Why is my indian coleus fungal root rot in cold, wet soil?
Overwintering plants in cold, damp compost are prone to Pythium and Phytophthora root rots; ensure containers have drainage holes and reduce watering significantly when temperatures drop below 15°C.