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Check these first
- Test your soil pH to ensure it is between 4.5 and 5.5.
- Check the soil moisture to see if it is waterlogged.
- Inspect the leaves for any signs of pests.
Likely causes
High soil pH
Most likelyHow to tell: The leaves turn yellow while the veins remain green, indicating iron chlorosis.
What to do: Apply an acidic fertilizer formulated for ericaceous plants. You can also mix in peat moss or sulfur to lower the pH of the soil.
Overwatering
PossibleHow to tell: The leaves look pale and limp, and the soil feels soggy or smells swampy.
What to do: Ensure the container has drainage holes so water does not pool at the bottom. Allow the top half inch of soil to feel damp but not saturated.
Find out what's wrong with your bog rosemary
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.
Scan with your phone's camera to get the app
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When to worry
It is normal for the oldest leaves at the base to yellow and drop as the plant grows. Worry if the yellowing is spreading rapidly across new growth.
Stopping it coming back
Use rainwater or distilled water instead of tap water to avoid mineral buildup that raises pH.
Bog rosemary: yellow leaves? Check yours with a photo
Every plant is a little different. Take a photo of your bog rosemary 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
- Can I use regular potting soil?
- No, regular potting soil is usually too alkaline and lacks the necessary drainage. Always use a mix designed for acid loving plants.
- Will the yellow leaves turn green again?
- Usually no. Once a leaf has turned yellow, it will likely drop off, but fixing the soil will help the new growth emerge healthy.
More problems with Bog rosemary
Back to the Bog rosemary 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.