Troubleshooting
Silver Ragwort problems — and how to fix them
Silver Ragwort (Jacobaea maritima) 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.
Botrytis grey mould
In cool, damp or humid conditions, grey mould (Botrytis cinerea) infects stems and leaves, causing collapse; improve air circulation, avoid wetting foliage, and remove affected material promptly.
Root rot in heavy or waterlogged soil
Phytophthora and Pythium root rots are the most common cause of plant death, particularly overwinter; always grow in sharply drained compost or soil and raise containers on feet to prevent water pooling.
Prevent silver ragwort problems before they start
Most silver ragwort issues are care-mismatch, not bad luck. Dial in the basics:
Silver Ragwort problems — FAQ
Why is my silver ragwort botrytis grey mould?
In cool, damp or humid conditions, grey mould (Botrytis cinerea) infects stems and leaves, causing collapse; improve air circulation, avoid wetting foliage, and remove affected material promptly.
Why is my silver ragwort root rot in heavy or waterlogged soil?
Phytophthora and Pythium root rots are the most common cause of plant death, particularly overwinter; always grow in sharply drained compost or soil and raise containers on feet to prevent water pooling.