I have 15 thuja Green Giant trees. I know its bad but can I top them? I need them to broaden Would it do them irreparable damage to take the leader down? Appreciate a reply Thank you. (Love your pages!) Oh I am in zone 8/9 on the coast of zip 28571
Green Giant and other types of arborvitae can be pruned, but it's advisable to cut back no farther than branches that contain green needles. Arborvitae tolerate shearing quite well, and can be maintained as a sheared hedge, if you like.