Prune the crown of the tree rose to remove weak branches, which are identifiable by the thickness of the branch. Thin branches are prone to damage and require pruning to maintain the bush's health.
Cover the tree roses with dormant oil to ward off insects.
Seal cracks and holes in the trunk with grafters wax to prevent insects from entering.
Cover the base of the tree rose with 6 inches of mulch and cover the crown with a burlap bag, which will protect it from wind exposure during winter.