Your choice of how much you cut back is a little more flexible.

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 pruning. Remove dead or damaged wood when you see it. Estimated Reading Time: 5 mins.

Basic pruning fundamentals that apply to all roses include: Use clean, sharp equipment. Cut at a degree angle about 1/4 inch above outward-facing bud. The cut should slant away from the bud.

Entirely remove all dead or dying canes. These can be identified as canes that are shriveled, dark brown. Hybrid Teas, Floribundas & Grandifloras: Modern reblooming roses are pruned in the early spring just as the buds begin to swell. Prune hard if you want large blooms suitable for cut flowers. This will produce fewer total blooms. In the spring, cut out all but three to five of the healthiest, most vigorous canes.

Repeat-flowering shrub roses Maintain a balanced framework by reducing strong new growth in late winter by up to one-third. “English” roses: prune Shorten strong sideshoots to two or three buds Mature plants require a light renewal pruning each winter by cutting some of the older main stems back.

feet. Generally, the harder a rose is pruned, the later it will bloom, and it will produce fewer but larger roses. Modern Shrub Rose Pruning Repeat-flowering shrub roses bear flowers on mature stems that are not old and woody.

Severe pruning of theses roses would result in reduced flower production. Gently prune these roses for the first 2 years. Before pruning, choose from one of the following: For a taller shrub – cut back by less than one third.

To maintain its current size – cut your rose back by one third. To reduce its size – cut back by a half or even more. This will reduce the size of the shrub without impacting the amount of flowering.