What is causing my cherry tree branches to grow like this?
Not all of the branches are like this just several on each of my cherry trees.
Certified GKH Gardening Expert
The deformity that you show in the photo is called "fasciation".
Fasciation can be caused by a genetic mutation, bacterial or mite infestation or systemic herbicide damage.
You can prune those pieces out and if you have not begun a dormant spray program then start ASAP. Horticultural oil and copper fungicide spraying is organic program compatible and will help to suppress over-wintering insect and mite pests, fungal and bacterial infections.