Ornamental evergreens turning brown, bare in patches
I have three evergreen bushes in a flower bed at the front of my house that have begun looking very sick. They have turned brown in patches and some of the branches on the interior of the trees are bare. I don't see any obvious insect infestation and all other bushes in the flower bed are just fine. Any ideas what might be causing this and what I might be able to do to save them?
Thank you very much for the detailed answer!