Spots on Autumn Blaze Maple

Asked June 12, 2019, 8:34 AM EDT

I have noticed red hard spindle looking spots on my maple tree leaves. Was wondering what this could be and how to eliminate it.

St. Louis County Minnesota diagnosis of plant problems horticulture autumn blaze maple

1 Response

The leaves shown in the photo have been affected by bladder galls. Although the galls may be unsightly, they have little or no effect on the tree's health so no control is recommended.

Go here to learn about more about these galls.