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Spindle · Euonymus europaeus

Why does my Spindle have white dusty spots?

That white, dusty coating on your leaves is likely powdery mildew, a common fungal issue for Spindle bushes. It usually thrives when air circulation is poor or humidity is high. Check the leaves to see if the white powder wipes off easily.

spots on a plant
Photo: Scot Nelson, CC0

Check these first

  1. Rub the white spots to see if they wipe off.
  2. Check if the plant is in a crowded area.
  3. Look for signs of moisture on the foliage.

Likely causes

  1. Powdery mildew

    Most likely

    How to tell: The leaves look like they have been dusted with flour or talcum powder. It often starts in patches and can spread to cover the entire leaf surface.

    What to do: Improve air circulation around the plant by moving it to a more open space. Use a mixture of one tablespoon of baking soda and a teaspoon of liquid soap in a gallon of water to spray the leaves. Apply this every 7 to 10 days until the white spots disappear.

  2. Water splashing

    Possible

    How to tell: Water spots or mineral deposits appear on the leaves after watering. These do not look like fuzzy powder and do not spread.

    What to do: Water at the base of the plant instead of over the leaves. Wipe the leaves gently with a damp cloth to remove mineral buildup.

When to worry

If the leaves start turning yellow or curling after the spots appear, the fungus is affecting the plant's health. Minor spots are common during humid weather and are usually easy to treat.

Stopping it coming back

Water only the soil and keep the plant in a location with good airflow to prevent fungal spores from settling.

Not sure which one it is? Photograph your spindle.

This page lists the usual causes. Pocket Botanist looks at your actual leaf 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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Questions people ask

Should I cut off the spotted leaves?
Yes, removing heavily infected leaves helps reduce the amount of fungus on the plant. Dispose of them in the trash, not your compost bin.
Is this fungus harmful to me?
No, powdery mildew is specific to plants and will not harm you or your pets. Just wash your hands after handling the infected foliage.

More problems with Spindle

Back to the Spindle guide

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