Pocket Botanist
Check these first
- Check if the branch tips are bent into a hook shape.
- Feel the soil to see if it is dry several inches down.
- Look for any oozing or sunken areas on the bark.
Likely causes
Fire Blight
Most likelyHow to tell: Branches look scorched or burnt, and the tips often curl into a shepherd's crook shape. The bark may look sunken or cracked.
What to do: Prune out infected branches at least 8 to 12 inches below the visible damage. Sterilize your pruning shears with alcohol between every single cut to prevent spreading the bacteria.
Drought Stress
PossibleHow to tell: Leaves curl inward during hot, dry spells to conserve moisture. The edges may turn brown and crispy.
What to do: Water the tree deeply every 7 to 14 days during dry periods. Apply a 2 to 3 inch layer of mulch around the base to keep the roots cool.
Find out what's wrong with your flowering 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
Fire blight is a serious emergency that can kill the tree if it reaches the trunk. Curling from heat is temporary and recovers with water.
Stopping it coming back
Avoid over fertilizing with nitrogen, which creates soft growth that is highly susceptible to fire blight.
Flowering Crabapple: curling leaves? Check yours with a photo
Every plant is a little different. Take a photo of your flowering 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
- Is fire blight contagious?
- Yes, it spreads easily through pruning tools, rain, and insects. Always disinfect your tools thoroughly.
- Can I save a branch with fire blight?
- No, you must remove the infected wood entirely. Cutting it out is the only way to stop the bacteria from moving further down the branch.
Guides to these causes
More problems with Flowering Crabapple
Back to the Flowering 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.