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Check these first
- Move the plant to a brighter, sunnier location.
- Test your water source for high mineral content.
- Check for any signs of pests on the underside of the leaves.
Likely causes
Insufficient light
PossibleHow to tell: The leaves lose their vibrant green color and start to fade or yellow slowly. This happens when the plant is kept in a shady spot instead of full sun.
What to do: Move the plant to a location that receives full, direct sun for at least 6 to 8 hours a day. Gradually introduce it to more light over a few days to avoid leaf burn.
Poor water quality
PossibleHow to tell: The tips or edges of the leaves turn yellow or brown due to high mineral content in the water. This is less common for this plant, but can occur if you use heavily chlorinated tap water.
What to do: Switch to using rainwater or distilled water for your plant. Flush the soil with fresh water to remove any mineral buildup.
Find out what's wrong with your common cottongrass
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 yellowing spreads rapidly across the whole plant, it may be a sign of severe stress. It is normal for the oldest, lowest leaves to yellow and die back as the plant grows.
Stopping it coming back
Ensure the plant receives full sun and use rainwater whenever possible to keep the soil chemistry stable.
Common cottongrass: yellow leaves? Check yours with a photo
Every plant is a little different. Take a photo of your common cottongrass 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
- Does my cottongrass need fertilizer?
- Cottongrass generally does not need much fertilizer. If the leaves are yellowing, it is almost always a light or water issue rather than a nutrient deficiency.
- Will the yellow leaves turn green again?
- No, once a leaf has turned yellow, it will not turn green again. You can trim it off to keep the plant looking tidy.
More problems with Common cottongrass
Back to the Common cottongrass 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.