I wonder if that would work here. Our winters are pretty long (Nov-Mar) and run from 20F to -20F . It is too late now for sure and the ground is like a rock and we got our second really big snow dump. Rather late but very welcome although I suppose any damage done by the cold to uncovered plants is already done. By that I mean stuff that dies back to the ground but has roots within a foot of the surface.
Only the rugosa which are very winter hardy. There is a place in Canada that does testing and has produced some nice roses. Since I am limited in space and roses are quite a bit 'touchier' than say dahlias or peonies, I tend to stick with them except for the two rugosa's that I have. Morden's Flame and Morden's Blush. I have to treat them heavily for aphids and for something that attacks the leaves and eventually eats them. You can see the little trails on the leaves until there is no leaf left.