Can be used for landscaping – this variety is very hardy and disease tolerant.
Can be grown in the ground or as a container plant.
Fertilize in spring and summer, and prune while dormant. For best blooming, Knock Out needs at least 4-6 hours of direct sun.
Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Knock Out is thought of as hardy, so this plant will survive close to or on freezing temperatures. Ensure your soil is loamy and has a ph of between 6.6 and 7.5 as Rose is a weakly acidic soil to weakly alkaline soil loving plant.As a hybrid variety, this plant will not reliably grow true to type from seed.
Australia – Application No: 2003/061 in 2003 1
Registration name: RADrazz
Bred by William J. Radler (United States, before 1995).
Introduced in United States by Conard-Pyle (Star Roses) in 2000.
Introduced in France by Selection Meilland in 2001 as ‘Knock Out’. 1
Knock Out ™, Knockout ™, Purple Meidiland