Pocket BotanistCheck these first
- Check if the soil remains wet for more than two days after watering.
- Gently dig around the base to see if the roots appear swollen or distorted.
- Observe if the plant wilts even when the soil is moist.
Likely causes
Clubroot
Most likelyHow to tell: The plant shows stunted growth and the leaves may wilt during the heat of the day. If you dig up the roots, you will see large, gnarled swellings.
What to do: Unfortunately, there is no cure for clubroot once it is established. Remove and destroy the affected plant and do not plant other brassicas in that spot for at least 5 to 7 years.
Poor Drainage
PossibleHow to tell: The soil stays soggy for days after watering, and the base of the plant looks mushy or discolored.
What to do: Improve soil drainage by adding organic matter like compost or grit before planting. Ensure the plant is not sitting in a low spot where water collects.
When to worry
Clubroot is a serious condition that requires immediate removal of the plant to prevent the spread of spores.
Stopping it coming back
Maintain a high soil pH by adding lime, as clubroot thrives in acidic soil conditions.
Not sure which one it is? Photograph your chou marin.
This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Questions people ask
- Can I save a plant with clubroot?
- No, it is best to remove the plant and soil to protect the rest of your garden.
- How do I know if my soil is too acidic?
- You can use a simple soil test kit from a garden center to check your pH level.
More problems with Chou marin
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.