Troubleshooting
Pyrenean Lily problems — and how to fix them
Pyrenean Lily (Lilium pyrenaicum) 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.
Lily beetle (Lilioceris lilii)
Bright-red adults and their slimy brown larvae skeletonise leaves rapidly from late spring; hand-pick daily or spray with pyrethrin-based insecticide as soon as adults appear in April.
Botrytis (grey mould)
Wet, cool springs encourage Botrytis elliptica, causing brown oval leaf spots and rotting stems; improve air circulation, avoid overhead watering, and apply a copper-based fungicide if infection appears.
Prevent pyrenean lily problems before they start
Most pyrenean lily issues are care-mismatch, not bad luck. Dial in the basics:
Pyrenean Lily problems — FAQ
Why is my pyrenean lily lily beetle (lilioceris lilii)?
Bright-red adults and their slimy brown larvae skeletonise leaves rapidly from late spring; hand-pick daily or spray with pyrethrin-based insecticide as soon as adults appear in April.
Why is my pyrenean lily botrytis (grey mould)?
Wet, cool springs encourage Botrytis elliptica, causing brown oval leaf spots and rotting stems; improve air circulation, avoid overhead watering, and apply a copper-based fungicide if infection appears.