Troubleshooting
Turk's Cap Lily problems — and how to fix them
Turk's Cap Lily (Lilium martagon) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Lily beetle
Scarlet lily beetle (Lilioceris lilii) is the most serious pest; adults and larvae strip foliage rapidly. Inspect regularly from spring and remove by hand or apply a suitable insecticide.
Botrytis elliptica (lily disease)
Brown spots on leaves progressing in wet weather. Improve air circulation and apply a fungicide at the first sign. Remove and destroy affected tissue.
Virus (CMV, tulip-breaking virus)
Spread by aphids; causes streaked, distorted flowers and stunted growth. Remove and destroy infected plants immediately and control aphid populations.
Slugs
Damage emerging shoots in spring. Apply a grit mulch around bulbs and use organic slug pellets.
Poor establishment
Martagons are slow to establish and may not flower in the first year after planting — this is normal. Do not disturb them once planted; they dislike being moved.
Prevent turk's cap lily problems before they start
Most turk's cap lily issues are care-mismatch, not bad luck. Dial in the basics:
Turk's Cap Lily problems — FAQ
Why is my turk's cap lily lily beetle?
Scarlet lily beetle (Lilioceris lilii) is the most serious pest; adults and larvae strip foliage rapidly. Inspect regularly from spring and remove by hand or apply a suitable insecticide.
Why is my turk's cap lily botrytis elliptica (lily disease)?
Brown spots on leaves progressing in wet weather. Improve air circulation and apply a fungicide at the first sign. Remove and destroy affected tissue.
Why is my turk's cap lily virus (cmv, tulip-breaking virus)?
Spread by aphids; causes streaked, distorted flowers and stunted growth. Remove and destroy infected plants immediately and control aphid populations.
Why is my turk's cap lily slugs?
Damage emerging shoots in spring. Apply a grit mulch around bulbs and use organic slug pellets.
Why is my turk's cap lily poor establishment?
Martagons are slow to establish and may not flower in the first year after planting — this is normal. Do not disturb them once planted; they dislike being moved.