Linden tree issues

Asked July 13, 2017, 5:30 PM EDT

Hi. Our linden tree didn't blossom this year (from the looks of it, the ones in my neighborhood didn't either, but I've seen others in other nearby areas that did). Now I'm finding leaves that look to be infected by gall mites (picture attached). Are the two things related? If not, what could have caused the tree not to blossom? And is there anything I should be doing besides removing and destroying the infected leaves? Thanks!

Boulder County Colorado trees and shrubs

1 Response


Sometimes linden trees don't bloom for a year. The blossoms could also have been damaged by the late snow that we had. Sometimes there are micro climates where temperatures and effects of the snow impact plants differently.

I don't believe the gall mites impacted the blooming of the tree.

I have included below a response from a horticulture agent regarding the gall mites which I believe you will find helpful.

Please contact us again if you have further questions.


CSU Extension Office, Master Gardener


While it looks like it's destructive, this is a common occurrence on many woody plants. One of the most common galls we see each year is hackberry nipple gall.

Your linden has finger-like galls, which are caused by eriophyid mites or gall mites. More information on galls can be found here:

I wouldn't recommend any treatment as it seems to be a seasonal thing...some years trees get the galls; other years they don't. The leaves are still healthy and can photosynthesize. Plus, since the galls have already formed, there is little you can do. There are a lot of natural predators that attack the mites causing the galls.

-Alison O'Connor, PhD, Horticulture Agent, Larimer County Extension