Pocket Botanist
Check these first
- Inspect the undersides of the leaves for orange dust.
- Check if the plant is crowded by other vegetation.
- Look for signs of moisture trapped on the leaves.
Likely causes
Rust fungus
Most likelyHow to tell: Small, raised orange or reddish spots appear on the leaves, often releasing a fine dust when touched.
What to do: Remove and destroy all affected leaves immediately to stop the spread. Improve air circulation around the plant by thinning out crowded stems. Avoid overhead watering to keep the foliage dry.
Leaf spot disease
PossibleHow to tell: Dark brown or black spots with yellow halos appear on the leaves.
What to do: Prune away infected foliage and dispose of it in the trash, not your compost. Ensure the plant is in a spot with full sun to help dry the leaves quickly after rain.
Find out what's wrong with your sheep sorrel
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 of the foliage, the plant will struggle to photosynthesize and may decline rapidly. A few small spots are manageable with quick pruning.
Stopping it coming back
Water at the base of the plant rather than over the leaves, and ensure your Sheep sorrel has plenty of space for airflow.
Sheep sorrel: spots? Check yours with a photo
Every plant is a little different. Take a photo of your sheep sorrel 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 eat leaves with spots?
- No, it is best to avoid eating any leaves that show signs of fungal infection or rust.
- Will the rust kill my plant?
- If left untreated, severe rust can weaken the plant significantly. Early removal of infected parts usually saves the colony.
Guides to these causes
More problems with Sheep sorrel
Back to the Sheep sorrel 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.