Mine produced just one bloom all year. It was a pretty one though.
I think I planted it at the very worst time and I didn't cut it down enough before I planted it because it had so much nice new growth on it. The new growth was frizzled by a heat wave within days, however, so that was really a bad decision. The combination of shipping shock, transplant shock, and heat wave was almost lethal.
It has some buds on it now, so I should be seeing a second flush any day.