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marsh foxtail · Alopecurus geniculatus

Why are my marsh foxtail leaves turning yellow?

Yellowing leaves are less common for this moisture loving grass, but it usually happens when the soil dries out too much or stays waterlogged for too long. Check the soil moisture levels first to see if your watering schedule is off.

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yellow leaves on a plant
Photo: Trio3D, CC BY-SA 4.0

Check these first

  1. Touch the top inch of soil to check for dryness.
  2. Smell the soil to ensure it does not have a foul odor.
  3. Inspect the base of the plant for mushy stems.

Likely causes

  1. Drying out

    Most likely

    How to tell: The soil feels dry to the touch and the grass blades look brittle or pale.

    What to do: Water your plant immediately until the soil is saturated. Keep the pot in a shallow tray of water to ensure the soil remains consistently damp.

  2. Waterlogging

    Possible

    How to tell: The soil smells sour or stagnant and the base of the stems looks mushy.

    What to do: Ensure the drainage holes are not blocked. If the soil is muddy, move the plant to a spot with better air circulation to help the excess water evaporate.

Yellow leaves on other plants

Find out what's wrong with your marsh foxtail

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 oldest, lowest leaves to yellow and die back as the plant grows. Worry if the yellowing spreads rapidly across the entire clump.

Stopping it coming back

Maintain a consistent watering schedule so the soil never fully dries out.

Marsh foxtail: yellow leaves? Check yours with a photo

Every plant is a little different. Take a photo of your marsh foxtail 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 cut off the yellow leaves?
Yes, you can trim them off with clean scissors to keep the plant looking tidy. This helps the plant focus its energy on healthy new growth.
Does yellowing mean I have a pest?
Pests are not a common cause of yellowing for marsh foxtail. Focus on your watering habits first.

More problems with marsh foxtail

Back to the marsh foxtail 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.