Troubleshooting
Cuckooflower problems — and how to fix them
Cuckooflower (Cardamine pratensis) 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.
Clubroot (Plasmodiophora brassicae)
A soil-borne pathogen affecting all Brassicaceae; infected plants wilt despite wet soil — improve drainage, raise soil pH above 7 with lime, and do not replant Brassicaceae in the same spot for several years.
Aphids
Colonies of aphids, particularly the cabbage aphid, can colonise stems and flower buds in spring; knock off with a strong water jet or introduce ladybird larvae as biocontrol.
Prevent cuckooflower problems before they start
Most cuckooflower issues are care-mismatch, not bad luck. Dial in the basics:
Cuckooflower problems — FAQ
Why is my cuckooflower clubroot (plasmodiophora brassicae)?
A soil-borne pathogen affecting all Brassicaceae; infected plants wilt despite wet soil — improve drainage, raise soil pH above 7 with lime, and do not replant Brassicaceae in the same spot for several years.
Why is my cuckooflower aphids?
Colonies of aphids, particularly the cabbage aphid, can colonise stems and flower buds in spring; knock off with a strong water jet or introduce ladybird larvae as biocontrol.