Troubleshooting
Crown Wax Plant problems — and how to fix them
Crown Wax Plant (Hoya coronaria) 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.
Cold damage and leaf drop
Temperatures below 15 °C cause leaf yellowing, drop, and growth arrest; keep away from draughty windows or cold windowsills in winter, especially in the UK.
Scale insects on hairy stems
The pubescent stems provide hiding places for scale insects; inspect stem joints regularly and treat with horticultural oil or systemic insecticide, ensuring thorough coverage of the textured surfaces.
Prevent crown wax plant problems before they start
Most crown wax plant issues are care-mismatch, not bad luck. Dial in the basics:
Crown Wax Plant problems — FAQ
Why is my crown wax plant cold damage and leaf drop?
Temperatures below 15 °C cause leaf yellowing, drop, and growth arrest; keep away from draughty windows or cold windowsills in winter, especially in the UK.
Why is my crown wax plant scale insects on hairy stems?
The pubescent stems provide hiding places for scale insects; inspect stem joints regularly and treat with horticultural oil or systemic insecticide, ensuring thorough coverage of the textured surfaces.