Pocket Botanist
Check these first
- Inspect the undersides of the leaves for fuzzy growth.
- Check if the plant is crowded by other vegetation.
- Feel the soil to ensure it is not waterlogged.
Likely causes
Fungal Leaf Spot
Most likelyHow to tell: You will see dark or discolored circular patches on the foliage. These often appear when humidity is high and leaves stay wet for too long.
What to do: Remove the affected leaves immediately to stop the spread. Improve air circulation by spacing out nearby plants and avoid overhead watering.
Poor Air Circulation
PossibleHow to tell: The plant looks healthy otherwise but has spots in the center where leaves are dense. This happens when moisture gets trapped between stems.
What to do: Prune back some of the inner stems to allow air to flow through the plant. Ensure the plant is in a location with a steady breeze.
Find out what's wrong with your wand loosestrife
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
Worry if the spots are spreading rapidly to new growth or causing the entire leaf to turn yellow. A few spots on older leaves are common in humid weather.
Stopping it coming back
Water at the base of the plant rather than over the leaves to keep the foliage dry. Provide plenty of space between plants for good airflow.
Wand loosestrife: spots? Check yours with a photo
Every plant is a little different. Take a photo of your wand loosestrife 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
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Questions people ask
- Can I use a fungicide?
- Yes, a copper based fungicide can help if the infection is widespread. Always follow the label instructions carefully.
- Should I cut off all spotted leaves?
- Yes, removing infected foliage helps prevent spores from spreading to healthy parts of the plant. Dispose of the clippings in the trash, not your compost.
Guides to these causes
More problems with Wand loosestrife
Back to the Wand loosestrife 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.