Pocket Botanist
Check these first
- Inspect the undersides of the leaves for powdery spores.
- Check if the plant is crowded by other pots.
- Feel the leaves to see if they stay damp for long periods.
Likely causes
Rust fungus
Most likelyHow to tell: You will see small orange or brown powdery spots on the leaves. This happens when humidity is high and air circulation is low.
What to do: Remove the affected leaves immediately to stop the spread. Improve airflow around the plant by spacing it away from others and avoid overhead watering.
Leaf spot disease
PossibleHow to tell: These appear as dark, irregular patches that may have a yellow halo. They often develop after the leaves stay wet for too long.
What to do: Prune away the damaged foliage and dispose of it in the trash. Keep the leaves dry by watering only at the base of the plant.
Find out what's wrong with your heath grass
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 may struggle to photosynthesize. A few small spots are manageable with pruning.
Stopping it coming back
Ensure your heath grass has plenty of space for air to move around it and always water the soil directly instead of wetting the leaves.
Heath grass: spots? Check yours with a photo
Every plant is a little different. Take a photo of your heath grass 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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Or go to pocketbotanist.app/get on your phone
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Questions people ask
- Can I save leaves with spots?
- It is best to remove them. Once a leaf is infected with fungus, it will not recover and can spread spores to healthy parts of the plant.
- Will the spots go away on their own?
- Usually not. Fungal issues require you to change the environment and remove the infected tissue to stop the cycle.
Guides to these causes
More problems with heath grass
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.