Question
we have a 30foot row of these about 10ft high 2-3feet thick and 4 bushes in the middle have 80%of dead and and brown branches and leaves on them also there is brown leaves through out the rest of them...we have below 0 temps in winter and tens and 20 to30 degrees the rest of the winter..we live in the pacific N.W. we give htem plenty of water and out temps in summer can get into the high 90's  we have all four seasons..we our getting ready to put on liquid mircle grow but I think they need something more. what do you suggest?? thank you

Answer
Bob,

I would recommend using the fertilizer on them, but also check the area around the 4 in the middle. It sounds to me like there is a drainage problem that will need addressing.

Arborvitae do not like a lot of water, and to have four decline in the same area is suspicious. I think you will find that too much water is building up in that area, drowning out the roots.

Good luck,
Ed Gulliksen