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Wild mustard · Sinapis arvensis

Is my wild mustard suffering from root rot?

It is less common for wild mustard to get root rot, as it prefers well-draining soil, but it can happen if the roots sit in water for too long. Check the soil drainage first to make sure your pot or garden bed isn't holding onto excess moisture.

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root rot on a plant
Photo: Ninjatacoshell, CC BY-SA 3.0

Check these first

  1. Smell the soil for a musty or rotten odor.
  2. Check if the pot has working drainage holes.
  3. Gently tug the plant to see if it feels loose in the soil.

Likely causes

  1. Overwatering

    Most likely

    How to tell: The plant looks stunted, the leaves turn yellow, and the stem base feels soft or mushy. The soil will have a sour or swampy smell.

    What to do: Stop watering immediately and let the soil dry out. If the plant is in a pot, check the drainage holes to ensure they are not blocked.

  2. Poor soil drainage

    Possible

    How to tell: Water pools on the surface for a long time after you water. The plant never seems to perk up even when the soil feels wet.

    What to do: Amend the soil with perlite or sand to improve drainage. If the plant is in a container, consider repotting it into a mix that allows water to pass through easily.

Root rot in other plants

Find out what's wrong with your wild mustard

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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When to worry

If the stem base is mushy and dark, the rot has likely reached the crown, which is often fatal. If the roots are still firm and white, the plant can usually be saved.

Stopping it coming back

Always let the top inch of soil dry out before watering again. Use a well-draining soil mix to prevent water from sitting around the roots.

Wild mustard: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your wild mustard and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

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Questions people ask

Can I save a plant with root rot?
If you catch it early, you can trim away the mushy roots and repot in fresh, dry soil. If the rot is widespread, it is often better to start over.
How do I know if the soil is draining well?
Water should soak into the soil within a few seconds. If it sits on top for minutes, your soil is too heavy.

More problems with Wild mustard

Back to the Wild mustard guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.