What is happening to my Arborvitaes?
I planted a number of Thuja Green Giants last spring - two didn't make it, but three seem to be thriving. They grew up and out substantially before the winter, and now that it's starting to warm up they are filling in nicely.
But, on all of them they are noticeably discolored. Some worse than others, but all have a reddish color on a lot of the lower, inner branches. Along with that there seems to be a number of dead spots, and even black patches. They seem to be growing in spite of this.
I live in northern Ohio, it's been a very wet spring, and they are at the top of a hill so pretty good drainage. I do have a male cat on my property, but could it spraying these cause this much damage? Or could this be some kind of fungus or disease? Thanks for your help!