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Japanese spindle · Euonymus japonicus

Why are there bumps on my Japanese spindle?

Seeing small white or brown bumps on your Japanese spindle usually means you have a scale infestation. These insects suck the sap from your plant and can weaken it over time. Check the undersides of the leaves and along the stems for these tiny invaders.

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pests on a plant
Photo: Jules Verne Times Two, CC BY-SA 4.0

Check these first

  1. Inspect the stems closely for small bumps.
  2. Look for sticky residue on the leaves.
  3. Check the undersides of leaves for clusters of insects.

Likely causes

  1. Euonymus scale

    Most likely

    How to tell: You will see small white or brown bumps that look like tiny shells attached to the stems or leaves. If you scrape them with a fingernail, they come off easily.

    What to do: Scrub the stems with a soft brush and soapy water to remove the insects. Apply horticultural oil or neem oil every 7 to 10 days to smother any remaining eggs or crawlers.

  2. Aphids

    Possible

    How to tell: These are soft bodied insects that cluster on new growth and cause leaves to curl. They often leave behind a sticky substance called honeydew.

    What to do: Spray the plant with a strong stream of water from a hose to knock them off. If they persist, use an insecticidal soap spray once a week until they are gone.

Pests on other plants

Find out what's wrong with your japanese spindle

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 plant is covered in bumps and the leaves are yellowing or dropping, it is a serious infestation. A few isolated bumps can be managed easily with regular cleaning.

Stopping it coming back

Keep your plant healthy with proper light and airflow to discourage pests. Regularly inspect the stems during your watering routine.

Japanese spindle: pests? Check yours with a photo

Every plant is a little different. Take a photo of your japanese spindle 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

Will these pests kill my plant?
A heavy infestation can cause significant dieback and eventually kill the plant if left untreated. Early detection is the best way to keep your Japanese spindle thriving.
Can I use chemical pesticides?
It is better to start with horticultural oil or insecticidal soap as they are safer for the plant and the environment. Avoid harsh chemicals unless the infestation is severe and persistent.

Guides to these causes

More problems with Japanese spindle

Back to the Japanese spindle 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.