erk
If Knockouts didn't make it, then maybe some of the Canadian Explorer series or the Bucks roses would do better? I have yet to see a Knock Out being killed by cold here and I get some awfully dry winds here off of the mountains.. makes your hands crack & bleed so drying!! You'll lose the top part of the canes.. to be expected. Expect to lose about 1/3 to 2/3rds of the canes due to cold. Most of my roses die down to the ground here, but I expect that.