What causes the brown sports on my arborvitae
Clackamas County Oregon
I have attached a picture. It is part of a very large hedge the ground is normally very wet. We did loose two trees last year. I do not water them and have never fertilized them
The tree was planted at least 15 years ago.
It is part of a 200 foot hedge.
We do not fertilize or water it.
We have only cut the area out.
We had two trees at the end of the row that died last year.
One other question, we have can we trim the hedge this time of year?
Thank you for your help.