Knowledgebase
Growth on oak tree #863165
Asked April 02, 2024, 4:13 PM EDT
Pine County Minnesota
Expert Response
Hi Gail,
You have Oak Gall which I know looks alarming but it's a pretty harmless condition caused by tiny insects.
https://extension.psu.edu/galls-on-oak
There isn't really anything you can do about them but they won't kill your tree.
http://www.minnesotaseasons.com/Insects/oak_rough_bulletgall_wasp.html
Sally Granath
Saint Louis County MG