Red blend Shrub Knock Out ® Bred by William J. Radler (United States, 1988).
Introduced in United States by Conard-Pyle (Star Roses) in 2000.
Introduced in France by Meilland in 2001 as 'Knock Out'.
Shrub. (Series: Earth Kind ™)
Cherry-red. Mild, spice, tea fragrance. 5 to 13 petals. Average diameter 3.5". Large, single to semi-double, cluster-flowered bloom form. Continuous (perpetual) bloom throughout the season. Decorative buds.
Armed with thorns / prickles, bushy, compact, rounded. Glossy, dark green foliage.
Height: 2' to 4' (60 to 120cm). Width: 3' to 4' (90 to 120cm).
USDA zone 4b through 9b. Can be used for landscape. Very hardy. vigorous. shade tolerant. Disease susceptibility: very blackspot resistant., susceptible to Mildew. Requires spring freeze protection (see glossary - Spring freeze protection) . Can be grown in the ground or in a container (container requires winter protection).
Breeder: William J Radler, Greenfield, USA.
'Radrazz' originated from the cross between a seedling of the variety 'Carefree Beauty' and a 'Razzle Dazzle' seedling.
