My slow growing leylandi trees are about 8 - 9 feet tall. The top 1 - 1.5 feet is a nice green but the remaining lower part is brown. If i brush the lower part there are a lot of loose dead leaves that fall away and the tree then looks a little bit better but it is still brown. I can't see any obvious sign of disease. Can you tell me why it is that the bottom part of the tree is brown and how I can get it green again?
- 19 May, 2012