Pocket Botanist
Check these first
- Look closely at the undersides of the leaves.
- Check if the spots are fuzzy or dry.
- Inspect nearby plants for similar symptoms.
Likely causes
Powdery mildew
Most likelyHow to tell: White, floury patches appear on the leaves during dry spells.
What to do: Increase air circulation around the plant. You can use a mild neem oil spray to treat the affected leaves.
Leaf spot disease
PossibleHow to tell: Dark or brown spots with yellow halos appear on the foliage.
What to do: Remove the infected leaves immediately to stop the spread. Avoid overhead watering to keep the leaves dry.
Find out what's wrong with your rough chervil
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 spots cover more than half the leaf surface, the plant will struggle to photosynthesize.
Stopping it coming back
Water at the base of the plant to keep foliage dry and ensure good spacing between plants.
Rough chervil: spots? Check yours with a photo
Every plant is a little different. Take a photo of your rough chervil 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Is powdery mildew contagious?
- Yes, it spreads easily through air currents. Isolate the plant if possible.
- Can I wash the spots off?
- You can wipe them off, but the fungus is still present. Treat the plant with an appropriate fungicide.
Guides to these causes
More problems with Rough chervil
Back to the Rough chervil 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.