I'm in zone 5b. I used to have Harvest of Memories and it was a pretty consistent rebloomer in fall. I also have Rosalie Figge that blooms in fall.
I have mixed feelings about rebloomers. I love to see the blooms, but since they bloom late in the season, I fuss over them if a freeze is expected overnight (cover with blankets or upended garbage cans). Plus, the blooms seem to get eaten by tarnished plant bugs and cucumber beetles. I have enough garden work to do in fall as it is.
Harvest of Memories in fall:
