I got my roses up North buried and covered with leaves; did not have to bag any leaves up here as other yards had their bagged leaves sitting out and were glad they did not have haul them to the compost site.
I had about 30 some bags and put a dozen to cover the roses up North; you are supposed to wait till it is low twenties and ground has frozen to cover roses but I did it when temps. were in the low thirties and as I buried them do not enjoy break-up frozen ground.
Twenty years ago, I bought a cluster of roses for fall planting and it hit low twenties hard and early so I had to break through the frozen ground to plant them. Of coure a week later temps. were in the sixties. Damned if you do and damned if you do not.
Heading down to the South garden tomorrow to bury and cover the roses down there; I am hauling a trailer load of leaf bags with me.
The ones I do not use I put on the North side of the house and use to cover my potatoes in spring.