I have about 20 arborvitae trees along my driveway and all are browning. I'm a new homeowner and do not know the trees' history. What sort of issue do the below pictures exhibit? Thanks.
I am in Long Island, NY. I am pretty sure the browning was already present when I moved in in March.
Update: 1.5 months after applying two rounds of Bayer mite treatment, here is the same set of trees: