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Field forget-me-not · Myosotis arvensis

Why does my Field forget-me-not have white spots?

Those white spots are likely powdery mildew, a common fungal issue for this plant. Check for poor airflow around the leaves.

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spots on a plant
Photo: Scot Nelson, CC0

Check these first

  1. Look for a dusty white texture on the leaves.
  2. Check if the plant is crowded by others.
  3. Inspect the underside of the leaves.

Likely causes

  1. Powdery mildew

    Most likely

    How to tell: A white, dusty coating appears on the leaves and stems.

    What to do: Remove the most affected leaves to stop the spread. Improve airflow by spacing plants out or moving them to a breezier spot.

  2. Water splashing

    Possible

    How to tell: Small brown or white spots appear after watering from above.

    What to do: Water at the base of the plant rather than over the foliage. Keep the leaves dry to prevent fungal growth.

Leaf spots on other plants

Find out what's wrong with your field forget-me-not

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 white powder covers most of the foliage, the plant will struggle to photosynthesize. Small spots are manageable with pruning.

Stopping it coming back

Water at the soil level and ensure your plants have enough space for air to circulate.

Field forget-me-not: spots? Check yours with a photo

Every plant is a little different. Take a photo of your field forget-me-not 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 wash the spots off?
You can wipe them, but the fungus is inside the leaf tissue. Pruning is more effective.
Is this harmful to other plants?
Yes, powdery mildew spores travel easily. Isolate the affected plant to protect your garden.

Guides to these causes

More problems with Field forget-me-not

Back to the Field forget-me-not 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.