Troubleshooting
Sea Stock problems — and how to fix them
Sea Stock (Matthiola sinuata) 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.
Grey mould (Botrytis cinerea)
Fluffy grey mould develops on stems and flowers in damp, still conditions; improve air circulation around plants, remove affected tissue promptly, and avoid wetting foliage when watering.
Clubroot (Plasmodiophora brassicae)
As a Brassicaceae member, sea stock is susceptible to clubroot in infected soils, causing wilting and swollen root galls; grow in well-drained, slightly alkaline soil and rotate planting positions annually.
Prevent sea stock problems before they start
Most sea stock issues are care-mismatch, not bad luck. Dial in the basics:
Sea Stock problems — FAQ
Why is my sea stock grey mould (botrytis cinerea)?
Fluffy grey mould develops on stems and flowers in damp, still conditions; improve air circulation around plants, remove affected tissue promptly, and avoid wetting foliage when watering.
Why is my sea stock clubroot (plasmodiophora brassicae)?
As a Brassicaceae member, sea stock is susceptible to clubroot in infected soils, causing wilting and swollen root galls; grow in well-drained, slightly alkaline soil and rotate planting positions annually.