Knock Out Roses Pruning Steps: To maintain a size of 3–4’ w x 3–4’ h, Knock Out Roses should be cut back once a year to 12” high. Check your rose bush from time to time in late winter/early spring, and when you start to see new shoots growing from the canes on your rose bush, that’s a good sign that it’s time to prune.
Jan 08, The best time to prune all types of roses is either in late winters or in early spring. This is the time when new growth starts. Fall is not a good time for pruning, as this could lead to the death of the plant. When it comes to cutting back a knockout rose plant, there are some things you should keep in bushleaning.buzzted Reading Time: 4 mins.
Mar 01, When to Prune. The beauty of Knock Out roses is that they can be pruned nearly any time without sacrificing beautiful blooms. Here in the south, we can expect the first flush of blooms around Mother’s Day in early May.
This will be the largest flush of bushleaning.buzzted Reading Time: 4 mins. In spring remove any winter injury.
Each spring remove any dead tips or stems. Then thin out the plants as needed by removing a couple of the older canes back to the ground or main stem.
As you can see less effort will give you better results with the Knock Out rose.