Pocket Botanist
Check these first
- Rub the white spots to see if they wipe off like dust.
- Check if the plants are crowded together.
- Observe if the leaves stay wet for long periods.
Likely causes
Powdery Mildew
Most likelyHow to tell: You will see a white, flour like coating on the surface of the leaves. It often starts as small spots and spreads to cover the whole leaf.
What to do: Remove the most heavily infected leaves to stop the spread. Improve air circulation by thinning out the patch and avoid overhead watering.
Poor Air Circulation
PossibleHow to tell: The center of the patch feels very dense and stays damp for a long time after rain.
What to do: Prune back some of the runners to allow fresh air to move through the foliage. This helps the leaves dry out faster after watering.
Find out what's wrong with your bugleweed
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
Mildew is common in late summer, but it is serious if it covers the entire plant and causes leaves to turn yellow or brown. Treat it early to prevent it from weakening the plant.
Stopping it coming back
Space your plants properly when planting and water at the base rather than over the leaves to keep them dry.
Bugleweed: spots? Check yours with a photo
Every plant is a little different. Take a photo of your bugleweed 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 use a fungicide?
- Yes, you can use a garden fungicide if the infection is widespread. Always follow the label instructions carefully.
- Will the spots go away on their own?
- They rarely disappear without intervention. It is best to prune the affected parts to keep the rest of the patch healthy.
Guides to these causes
More problems with Bugleweed
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.