We have an ornamental small tree that we were told is a "May" tree,...

Asked September 9, 2014, 4:05 PM EDT

We have an ornamental small tree that we were told is a "May" tree, and has beautiful white blossoms in the spring. It has developed big growths on a number of the branches. The growths are brown, hard and lumpy, and are usually about 6-10 inches, and encircle the branch. Most of the branches with this look OK, but now one of them is dying, the one with the biggest growth. Should we be cutting these branches off the tree? Is now a good time to do that?

Carver County Minnesota ornamental trees

1 Response

A good photo of the tree, branches, leaves and this growth would be very helpful. Many diseases are specific to certain trees and without knowing what your tree is it would be a shot in the dark.

It sounds like some kind of canker. Cherry trees are susceptible to Black Knot disease. I hesitate to recommend any treatment without knowing what tree this is, and what is ailing it.

I'll look for some photos from you.