I have one that was transplanted from my son's yard and never missed a beat. That thing was full when he brought it to me and never dropped flowers and was full through until late, late fall, almost winter. We got a late freeze for several days after it started greening and it froze back. Never bloomed again.

I have some Endless Summer and some that were nameless when I got them. They all bloomed outstandingly well the first summer. None have ever bloomed again although they sometimes get waist high although tey all die back to the ground every year.