For best results, cut back Hybrid Tea, Floribunda, and Grandiflora Roses in early spring after the last hard frost to 10" to 18". Remove all winter-injured or damaged wood. Never prune in the fall or winter, as this is the time roses are preparing for dormancy, and you do not want to create unnecessary growth.
Prune Climbing Roses only as needed to control their size. Remove the older wood, and prune sparingly, as the top is needed for blooming. Always be sure to prune after the plant has finished blooming to avoid cutting off flowering buds.
Prune Shrub Roses in early spring after the last hard frost to promote healthy growth and encourage lots of flowers. Simply use hedge trimmers or loppers to shear the shrub down to about ⅓ or ½ its current height. It’s okay if what remains is only about 12–18" above the ground.