I'm in zone 4 and I have some potted peonies and rose shrub that I'd like to get on the ground this weekend. Is it too late to plant them now?
Peonies usually do well when planted in the fall. I have moved some as late as the end of October, so you should be O.K. in your zone.
I do not have lots of experience with roses - last year was my first. I had planted out four plants (from cuttings) in late summer, of which three survived, but by November 7, I had no room for the remaining four plants, so I sunk the pots in the ground and covered them with leaves. They survived the winter and bloomed this summer. I find sinking pots in the ground and mulching a good way of overwintering plants if I'm not sure they will survive the transplant shock. Hope this helps.