Prune them in the spring before the leaves appear.

If you want your plant to maintain a size of less than 18” h, Petite Knock Out should be cut back once a year to ” high in late winter/early spring. 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 bushnotch.baron: 8 Federal Road, Suite 6 West Grove, PA United States.

Sep 17, Many shrub roses bloom on shoots emerging from old wood, so you can't cut back old wood in the spring without sacrificing blooms.

When these plants need pruning, do so little by little. Trim out just a few canes in the spring.

They are now very rare.

And then throughout the year, prune whatever is necessary to maintain the plant's bushnotch.barted Reading Time: 5 mins. Jan 08, These roses do need some care, and that includes pruning. 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 bushnotch.barted Reading Time: 4 mins.

For starters, all plants require regular watering, fertilizing, and pruning. Since rose bushes bloom in the summer, the more intensive pruning will usually occur in the spring. For summer pruning, you will only need to lightly “deadhead” remove dead wood, and form the bush.