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Wild mustard · Sinapis arvensis

Why is my wild mustard dropping its leaves?

It is less common for wild mustard to drop leaves, and it usually happens because of extreme moisture stress or sudden temperature shifts. Check your watering schedule first to see if the soil has dried out completely or stayed soggy for too long.

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Check these first

  1. Feel the soil moisture level with your finger.
  2. Check the base of the stem for any signs of decay.
  3. Observe if the plant wilts during the heat of the day.

Likely causes

  1. Inconsistent watering

    Most likely

    How to tell: The leaves may wilt before turning yellow and falling off. The soil will feel either bone dry or like a swamp.

    What to do: Stick to a rhythm of watering every 3 to 7 days. Ensure the top inch of soil dries out slightly before you add more water.

  2. Extreme heat stress

    Possible

    How to tell: The plant looks limp during the hottest part of the day and drops older, lower leaves to conserve energy. The soil might dry out much faster than usual.

    What to do: Move the plant to a spot with a bit of afternoon shade if possible. Increase your watering frequency slightly during heat waves to keep the soil evenly moist.

Leaf drop 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

It is normal for the very bottom leaves to drop as the plant matures. Worry if the top, new growth starts falling off.

Stopping it coming back

Maintain a steady watering routine and keep the soil moisture consistent. Mulching around the base can help keep the roots cool.

Wild mustard: leaf drop? 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

Should I fertilize a plant that is dropping leaves?
No, wait until the plant recovers. Adding fertilizer to a stressed plant can make the situation worse.
Will the leaves grow back?
The plant will grow new leaves from the top, but the bare spots on the lower stem will likely stay empty.

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.