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Mirror Bush · Coprosma repens

Why are there spots on my Mirror Bush leaves?

Spots on your Coprosma repens usually point to fungal issues or moisture sitting on the foliage for too long. Check your plant for a white, dusty coating first, as this is a common sign of powdery mildew.

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spots on a plant
Photo: Scot Nelson, CC0

Check these first

  1. Inspect the leaves for a white, powdery residue.
  2. Check if you have been watering from overhead.
  3. Look for signs of poor airflow around the plant.

Likely causes

  1. Powdery Mildew

    Most likely

    How to tell: You will see a white, dusty or flour like coating on the leaves and stems. It often happens when air circulation is poor or humidity is high.

    What to do: Wipe the leaves with a damp cloth to remove the fungus. Apply a neem oil spray or a mixture of one tablespoon of baking soda in a gallon of water to the affected areas once a week until it clears.

  2. Leaf Spot Disease

    Possible

    How to tell: This is less common for this plant, but usually happens due to overhead watering that leaves moisture on the leaves for too long. You will see dark or brown circular spots that may have a yellow halo.

    What to do: Prune away the most heavily infected leaves to stop the spread. Water only at the base of the plant to keep the foliage dry, and ensure your plant has plenty of airflow.

Leaf spots on other plants

Find out what's wrong with your mirror bush

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

Worry if the spots are spreading rapidly to new growth or causing significant leaf drop. A few small spots on older leaves are usually nothing to stress about.

Stopping it coming back

Keep the foliage dry when watering and make sure your plant is in a spot with good air movement.

Mirror Bush: spots? Check yours with a photo

Every plant is a little different. Take a photo of your mirror bush 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 just cut off the spotted leaves?
Yes, removing damaged leaves helps the plant focus its energy on healthy growth. Just make sure to use clean, sharp scissors.
Will these spots go away on their own?
Fungal spots rarely disappear without intervention. You should treat the plant to prevent the infection from worsening.

Guides to these causes

More problems with Mirror Bush

Back to the Mirror Bush 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.