what is causing my arborvitae to turn brown?
I have four green and three yellow ribbon arborvitae. The have been in the ground for almost three years. This summer they started slowly turning brown. I had fertilized them with Miracle Grow that is sprayed through the garden hose, about a month before they started turning brown. One is completely brown, the others are slowly turning brown. What could be causing this? I tapped some of the branches onto white paper to see if there were any bugs, and small, flea looking bugs were on the paper. I get these same bugs in my basement, but they die quickly. Any help would be appreciated. It is difficult to diagnose the problem without actually seeing them. But, first, I don’t think the bugs are the problems. My best bet might be stress from our unusual summer and fall – so much late heat and very little rain. I would suggest considering whether they were watered too much or not watered enough. Check the soil. What does it look like? Is it wet and mucky or dusty and dry? Does it have a smell