Can you HELP my Hydrangea? It came in full bloom and was the prettiest it has been in its 4 year life. But now it is slowly dying off but as if something is spreading. It started on one side and is some what quickly moving across the plant. I checked where it enters the ground to make sure it hadn't been chewed and it looked fine (to an untrained eye) I have another hydrangea 5 feet away that is doing just fine. Any ideas?