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In the spring, remove the oldest third of the canes.

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.

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 takedownbush.buzzted Reading Time: 4 mins.

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.

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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 Estimated Reading Time: 4 mins.

Apr 08, As for when to prune knockout roses in Tennessee, during spring the best time is late February to mid-March, or after the last hard frost. For summer, prune the spent blooms as needed to keep your roses neat. Winterizing your knockout roses should occur after the first fall freeze. A resting phase is a good time to prune. About the only time not to prune is late summer and early fall, as this might encourage late growth that wouldn't harden off in time for winter. In the North, winter is not a good time to prune, but winter is just fine in the takedownbush.buzzted Reading Time: 7 mins.

Sep 12, If the existing buds have swelled up but no new growth has appeared, it means the roses are ready to prune. The main pruning period for knockout roses is in late winter or early spring, just as the plant prepares for another season of growth.

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