Northern Privet problems
We have a border of Northern Privets around our deck. They are 25 years old and stand about 12 feet tall. They have always been full and bushy on the top 6 feet and look dead and bare below that. For the past 2 years we have noticed lots of new leaves and fullness in early Spring and then everything below 2 feet dries up and dies while the top continues to grow. There are no signs of spider mites or honey fungus. Does this sound like a pruning issue? We have pruned the top but never below 3 feet. At this point they look awful and I wonder if we should cut them right down to a foot or so... PLEASE HELP!