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 Estimated Reading Time: 4 mins. The best time to prune most roses is in late winter or very early spring, before the plants break dormancy (when the buds begin to swell), or when the plants are just starting to send out new growth in the form of tiny, red buds. This is around the time when forsythia bushes bloom. Most standard climbing roses are the exception to this rule.
The best time to cut back roses is on spring when the buds start to swell on your rose plants. The bumps on the canes should be huge and reddish in hue by then. Timing your pruning before those buds open. Here is a short tutorial on how to cut back your overgrown roses:Estimated Reading Time: 5 mins. Dec 15, University of California Agriculture and Natural Resources: January Is Time to Prune Roses; Sunset: Shape-up Time for Roses.
Prune only if you know the rose requires pruning. I wait until early spring when I can tell which canes, if any, are dead.
These I cut back to living tissue or to the base, depending on the amount of dead cane.