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Check these first
- Look for fungal growth or spores on the spots.
- Check for insects on the underside of the leaves.
- Clean up any debris under the tree.
Likely causes
Fungal leaf spot
Most likelyHow to tell: Small brown or black spots appear on the leaves, sometimes with a yellow halo. These spots may grow together as the season progresses.
What to do: Clear away all fallen leaves from under the tree to prevent spores from spreading. If the infection is severe, apply a copper based fungicide in the spring as leaves emerge.
Feeding damage
PossibleHow to tell: Small, irregular holes or discolored spots appear where insects have been feeding. You might see tiny insects or their droppings on the leaf surface.
What to do: Identify the insect and use a targeted spray if necessary. Often, the damage is minor and does not require chemical intervention.
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
Most leaf spots are cosmetic and do not threaten the life of the tree. Only worry if the spots cause significant premature leaf drop.
Stopping it coming back
Ensure the tree has good air circulation and keep the area under the canopy clean of old leaves.
Siberian elm: spots? 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.
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 the spots go away?
- The existing spots will not disappear, but new growth should be healthy if you manage the environment. The tree will replace these leaves next season.
- Is this contagious to my other plants?
- Many fungal leaf spots are specific to certain tree species. Keep an eye on other elms, but other plant types are likely safe.
Guides to these causes
More problems with Siberian elm
- Why are there holes in my Siberian elm leaves?
- Why is my Siberian elm dropping its 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 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.