Darkness Inside Oak tree branches
I recently pruned our 10 oak trees- all of which are around 8-15 years old- and noticed that on a few of the trees the branches seem to be dying inside. Not sure if that is actually the case or if something else is going on. I’ve included a photo of the area post-prune.
Certified GKH Gardening Expert
This is normal spotting. This could be from an injury by insect, or just overall minor injury. This is nothing that would seem worrisome or out of the ordinary.