Pocket BotanistCheck these first
- Check the soil moisture at a depth of 6 inches.
- Inspect the undersides of fallen leaves for small larvae.
- Look for skeletonized patterns on the remaining foliage.
Likely causes
Severe drought
Most likelyHow to tell: The leaves turn yellow or brown and fall off during hot, dry summer months. The soil around the base will feel bone dry to the touch.
What to do: Water the tree deeply once every 7 to 14 days. Ensure the water reaches 12 to 18 inches into the soil to support the root system.
Elm leaf beetle
Most likelyHow to tell: You will see skeletonized leaves where the green tissue is eaten away, leaving only veins. Small larvae may be visible on the undersides of the leaves.
What to do: Apply a systemic insecticide labeled for elm leaf beetles to the soil around the base of the tree. Follow the label instructions for the correct dosage based on the trunk diameter.
Find out what's wrong with your siberian elm
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 normal for a tree to lose some leaves during a very hot summer, but losing more than half the canopy is a sign of severe stress. If the tree drops all its leaves by mid summer, it is in serious trouble.
Stopping it coming back
Maintain a consistent watering schedule during dry spells and keep the area around the base mulched to retain moisture.
Siberian elm: leaf drop? Check yours with a photo
Every plant is a little different. Take a photo of your siberian elm 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.
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Or go to pocketbotanist.app/get on your phone
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Questions people ask
- Will my tree die if it loses its leaves?
- Not necessarily, but it weakens the tree and makes it susceptible to other issues. Consistent water helps it recover.
- Can I just rake up the leaves?
- Yes, raking up fallen leaves helps remove potential overwintering sites for pests. Dispose of them away from the tree.
Guides to these causes
More problems with Siberian elm
- Why are there holes in my Siberian elm leaves?
- Why are my Siberian elm leaves turning yellow?
- Why are my Siberian elm leaves getting brown tips?
- Why is my Siberian elm drooping?
- Why are there spots on my Siberian elm leaves?
- Why is my Siberian elm showing signs of root rot?
- Why are my Siberian elm leaves curling?
Back to the Siberian elm 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.