I planted a cedar hedge six years ago.The hedge has grown from 6FT. to about 10FT.It is starting to show brown foilage on outerside of shrubs.What can I do
Follow links to Tip Blight Twig Blight Leaf Blight to see if anything might fit. http://pnwhandbooks.org/plantdisease/host-disease-descriptions?title=thuja