May 05, Water at the bottom to avoid promoting diseases. Even though Knockout roses are disease resistant, it is still better to take these steps. Help keep the moisture in the ground by lightly mulching around the base of the rose bush, leaving about an inch gap near the main trunk to avoid mildew or disease. On the flip side, don't overwater your roses. Follow these simple steps to cut back your Knock Out Roses: 1: Gather your Tools. You will need a few basic tools when the time comes to cut back your roses: gloves, hedge shears, and hand pruners.
2: Decide where to Cut. Determining where to cut depends on what size you want your rose bush to finish. This rose is a Knockout. Roses, long a gardener's favorite and our country's National Flower, still suffer from the reputation of being hard to grow.
In reality, roses are tough, long-lived, flowering shrubs. No plant is more flexible, more versatile, and more fun than the rose in all its myriad forms. It takes a lot to impress bushremoval.buzzted Reading Time: 7 mins.
Jun 11, If no rose bush forming pruning is done to adjust their height and/or width, the Knock Out roses can reach 3 to 4 feet (1 m.) wide and 3 to 4 feet (1 m.) tall.
In some areas, an early spring pruning 12 to 18 inches ( cm.) above the ground works well, while in areas with harder winters they may be pruned down to around 3 inches (8 cm.) above the ground to remove the dieback of the canes.
Spread 3 inches of organic mulch around the base of the Knock Out rose bush. Use shredded bark, wood chips or chopped leaves to retain soil moisture and reduce weed growth.