What is the best way to raise American arborvitae trees to keep them from turning yellow and brown? The secret for keeping them green is not discovered by me yet. Brighton, CO 80601
It is common for the foliage of the American Arborvitaes to turn yellow or brown in the winter. Please click here http://ohioline.osu.edu/b614/f25-28.html and view Figure 27 for a picture of a common foliage occurrence. Is this how your trees look?