When using a rose collar, place it around your hybrid roses in early November. Fill it with black earth, 3 & 1 mix or compost. The soil will freeze solid, protecting the graft point. This protects the rose from freezing and thawing repeatedly through the fall/winter season. In spring, remove the collar and spread the soil throughout the garden.
This is only needed for hybrid roses as they are not as hardy in our zone.
Size: 20” x 30”