I can recall, a neighbor, (about 40 years ago) that had a couple of huge specimens & suddenly noticed, one spring, they weren't in bloom any more.
I wondered what happened to them all. Then I realized, they'd divided them up & attempted to make at least a good 30 or 40 foot long ',"hedge row ", out of them & didn't see but a single flower, or two, that very next spring.
It must have taken over 5 years, before that ever looked right & had filled in adequately enough, to have ever started to begin to flower, more like a "solid hedge" of blooms. Of course it looked fantastic, after that many years, but it sure did take a long time, for it to ever appear anything nearly proper.
