Hi! first of all I really hope I posted this in the right spot, I have a two year old PJM Rhododendron that has suffered minimal early spring frost a few weeks ago but has gone on to flower. Most of the flowering has come in during the past 5 days but I've noticed the flowers are starting to fall off already, is this normal or should this Rhododendron be keeping the purple flowers for a while still? The only info I can find is that it flowers in April, so it's right on time, I just thought it would keep them for more than a week?