when should you prune your knock knockout roses
Single and double Knock Outs are hardy in U.S. Department of Agriculture plant hardiness zones 4 through 10 or zones 5 through 11, depending on the source. Pruning both kinds of Knock Out roses on a regular basis helps keep them healthy and shaped. Spring and Fall Pruning Single and double Knock Out roses benefit from an annual late-winter or early-spring pruning, whether they grow in cool or warm climates. Wait until the shrubs have had at least their second year of growth to prune them, however; they are mature then.