I'm not Brian but flowers die and transform into seeds, takes too many energy from the tree.Brian
You may have said / answered this before, I have read this thread many times but did not tonight. Question, why remove all the flowers tonight, they still seem in good shape, what happens if you just let them fall off as they die?
Beautiful Tree, you have done a wonderful job with it from the start of a shrub.
The flowers are kept long enough to enjoy the show and removed before the start to wither to save energy and resume growth