Trying to save arborvitae
I have this row (see pic) of 5 emerald green arborvitaes and all of them look great except one which I have also pictured by itself. It is turning a little lighter than the others and it also smaller. The soil around the roots is normal and I can't see why it is a little unhealthier. I have given it extra water and use water soluble miracle gro on all of them. Any help would be appreciated.