Last Updated: July 5, References Approved.

Mar 09, The middle of March is a great time to prune back your roses. If getting snippy makes you nervous, just remind yourself that you won't kill a rose plant with poor pruning.

The new shrub roses Estimated Reading Time: 3 mins. Sep 17, The general rules for pruning Knock Out roses include: Always prune in early spring when new shoots are beginning to form on the canes. Prune to about a third of the desired final size.

Knock Out roses typically triple in size after stumpcut.barted Reading Time: 5 mins. Generally hardier then other roses, these more primitive types bloom first on old wood mid-summer; re-bloomers repeat on the current season’s growth. In early spring, remove diseased, broken, or dead branches.

This can be achieved by removing any unhealthy-looking parts of the plant that could become an issue if left alone.

After flowering, prune lightly and selectively to shape the bushes and control growth. Climbing and Rambling Roses.