Pocket Botanist
Check these first
- Inspect the undersides of the leaves for fuzzy, dark growth.
- Check if the spots are appearing on the fruit as well as the leaves.
- Look at the density of the branches to see if air can move through the center.
Likely causes
Apple Scab
Most likelyHow to tell: You will see olive green or brown spots that eventually turn black and scabby. These spots often appear on both leaves and fruit during wet spring weather.
What to do: Rake up and destroy all fallen leaves in the autumn to remove fungal spores. Prune the tree to improve airflow through the canopy, which helps leaves dry faster after rain.
Leaf Spot Fungi
PossibleHow to tell: These appear as smaller, circular spots with distinct borders. They often show up later in the summer compared to apple scab.
What to do: Keep the area around the base of the tree clean of debris. Avoid overhead watering, which keeps foliage wet and encourages fungal spread.
Find out what's wrong with your european crabapple
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
It is serious if the tree loses most of its leaves by midsummer, as this weakens the plant for next year. A few spots are normal in humid climates.
Stopping it coming back
Choose disease resistant varieties when planting and ensure the tree gets full sun to keep foliage dry.
European crabapple: spots? Check yours with a photo
Every plant is a little different. Take a photo of your european crabapple 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
- Will apple scab kill my tree?
- It rarely kills a mature tree, but it can make it look unsightly and reduce fruit production. Consistent cleanup is the best way to manage it.
- Should I use a fungicide?
- Fungicides are usually only helpful if applied preventatively in early spring before symptoms appear. Once spots are widespread, they are mostly ineffective.
Guides to these causes
More problems with European crabapple
- Why are my European crabapple leaves curling?
- Why are there bugs on my European crabapple?
- Why are my European crabapple leaves turning yellow?
- Why are my European crabapple leaves turning brown at the tips?
- Why is my European crabapple drooping?
- Why is my European crabapple losing its leaves?
- Why is my European crabapple not blooming?
Back to the European crabapple 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.