Troubleshooting
Scarlet Martagon Lily problems — and how to fix them
Scarlet Martagon Lily (Lilium chalcedonicum) 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 (Lilioceris lilii)
Bright scarlet adult beetles and their grubs (concealed in their own dark excrement) rapidly skeletonise leaves and destroy buds. Inspect plants daily from late March; hand-pick adults and larvae immediately. Treat with pyrethrum-based sprays in the evening to reduce pollinator impact. Particularly damaging on this species because its Mediterranean origin makes it less robust when defoliated.
Botrytis elliptica (lily grey mould)
Causes water-soaked brown lesions on leaves and stems in wet, cool conditions, rapidly leading to defoliation. Ensure excellent air circulation; remove and dispose of infected material immediately. Apply a copper- or mancozeb-based fungicide preventively at bud emergence in wet springs.
Basal bulb rot (Fusarium oxysporum)
Waterlogged soil causes brown rot spreading from the basal plate of the bulb upward, leading to stem collapse. Plant in sharply drained, elevated sites or raised beds. Inspect purchased bulbs for soft or discoloured patches before planting; discard any suspects.
Prevent scarlet martagon lily problems before they start
Most scarlet martagon lily issues are care-mismatch, not bad luck. Dial in the basics:
Scarlet Martagon Lily problems — FAQ
Why is my scarlet martagon lily lily beetle (lilioceris lilii)?
Bright scarlet adult beetles and their grubs (concealed in their own dark excrement) rapidly skeletonise leaves and destroy buds. Inspect plants daily from late March; hand-pick adults and larvae immediately. Treat with pyrethrum-based sprays in the evening to reduce pollinator impact. Particularly damaging on this species because its Mediterranean origin makes it less robust when defoliated.
Why is my scarlet martagon lily botrytis elliptica (lily grey mould)?
Causes water-soaked brown lesions on leaves and stems in wet, cool conditions, rapidly leading to defoliation. Ensure excellent air circulation; remove and dispose of infected material immediately. Apply a copper- or mancozeb-based fungicide preventively at bud emergence in wet springs.
Why is my scarlet martagon lily basal bulb rot (fusarium oxysporum)?
Waterlogged soil causes brown rot spreading from the basal plate of the bulb upward, leading to stem collapse. Plant in sharply drained, elevated sites or raised beds. Inspect purchased bulbs for soft or discoloured patches before planting; discard any suspects.