Rhododendron Flower Buds Turn Brown Previous Autumn
I have some white flowering rhododendrons that are now about 4 feet tall (and more than 10 years old). The last several years they have not bloomed.
This year and last I noticed that the flower buds seem to have formed normally during the summer but little by little they are turning brown even before winter..
More exactly flaps usually starting with the outermost layer (down at the base) turn brown one at a time and then the next layer turns brown and before too long the entire bud is brown. Come spring the (brown) buds don't open and bloom.
Do I need to spray for pests or diseases?