Knowledgebase

What are these? #872221

Asked June 08, 2024, 5:31 PM EDT

I found hundreds of these on trees along my property at the edge of the woods.Can you tell me what these are? Ridgely MD

Caroline County Maryland

Expert Response

Those look like a type of gall. Galls are abnormal tissue swellings caused by various insects, and are not of concern.
It could possibly be one of these.
Here is our page on galls, which explains more: 
https://extension.umd.edu/resource/tree-and-shrub-galls/


Christine
Answered by theHome and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied June 10, 2024, 11:55 AM EDT

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