The Fairy does well in zone 6, winter kills it back enough to keep it from getting out of control, but it will reach 3-4' by mid summer even if it is killed to the ground. It does well on its own roots too.
I had Reine des Violettes as a grafted plant from Wayside several years ago and it was always wimpy. Not sure what the problem was, but I would try it again from Palatine.
Margie, your Dixieland Linda is gorgeous! You got that from Heirloom?