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Peanut · Arachis hypogaea

Why are my peanut plant's leaves turning yellow?

Yellowing leaves on a peanut plant usually signal that the roots are struggling with moisture levels. Check your soil moisture first to see if you are overwatering or underwatering.

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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 dampness.
  2. Inspect the drainage holes to ensure they are not blocked.
  3. Look for signs of pests on the undersides of leaves.

Likely causes

  1. Overwatering

    Most likely

    How to tell: The soil stays soggy for days and the yellowing starts on the lower leaves.

    What to do: Let the top inch of soil dry out completely before watering again. Ensure your pot has drainage holes so excess water can escape.

  2. Nutrient Deficiency

    Possible

    How to tell: Leaves turn pale yellow while veins remain green, often indicating a lack of iron.

    What to do: Apply a balanced liquid fertilizer diluted to half strength every 4 weeks during the growing season. Avoid over fertilizing as this can burn the roots.

Yellow leaves on other plants

Find out what's wrong with your peanut

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 drop as the plant matures. Worry if the yellowing spreads rapidly to new growth.

Stopping it coming back

Maintain a consistent watering schedule and ensure the plant receives at least 8 hours of direct sun daily.

Peanut: yellow leaves? Check yours with a photo

Every plant is a little different. Take a photo of your peanut 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 snip them off with clean scissors to keep the plant tidy. This helps the plant focus its energy on healthy growth.
Can too much sun cause yellow leaves?
Usually, direct sun is exactly what peanuts need. If leaves look bleached or white, it might be sunscald, but yellowing is almost always water related.

More problems with Peanut

Back to the Peanut 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.