Help! What's turning my junipers brown?
I've got about 25 junipers on a hill in front of my house, most of which I planted 14 months ago. They're just starting to turn brown. Interestingly, it looks like they're turning brown from the center out, rather than from the tips inward like I would expect. I have no idea how to tell what the cause is or what to do. We've had a good amount of rain lately and temperatures just went below freezing for the first time, but I wouldn't think that would cause this. . .
Any thoughts on what I should do. I don't want these babies to die! Some pictures of three different ones are below, in case they help.