Blushing Knock Out is a single or semi-double pink rose.
Knock Out roses are a series of hybrid rose varieties introduced in the United States by the Conard Pyle Company beginning in 2000. They were bred by William J. Radler, a veteran rose breeder with more than 30 introductions to his credit, including many award winners. There are seven Knock Out rose varieties. Two are red, four are shades of pink, and one is yellow. Two of the seven varieties have double sets of petals.
History
Wisconsin rose breeder William J. Radler began raising roses in his teens and went on to assemble a large rose collection and make a career out of breeding the plants. As a gardener in an extremely cold winter climate, he aimed for hardy roses that were also disease resistant. After crossing two roses, Razzle Dazzle -- a red-blend floribunda -- and the American-bred, pink-flowered shrub rose, Carefree Beauty, Radler came up with Knock Out, which is a red shrub rose with seven petals per flower and a light scent. The roses were evaluated for eight years at Conard Pyle before introduction.
Pink Knock Outs
The four pink Knock Out roses include the light pink Blushing Knock Out which is 3 feet tall with seven to 11 petals per flower; the orange-pink blend, Rainbow Knock Out, with five to six petals per flower; Pink Knock Out, featuring medium pink flowers with four to eight petals apiece; and Pink Double Knock Out, a sport (spontaneous genetic mutation) of Double Knock Out with 17 to 25 warm pink petals per flower.
Red and Yellow Knock Outs
The original Knock Out rose and its double-flowered sport, Double Knock Out, both have red petals and grow between 2 and 4 feet tall. Knock Out has a faint tea rose fragrance, while Double Knock Out has little or no scent. Sunny Knock Out, the newest in the series, has four to eight medium, yellow petals and moderate fragrance.
Considerations
Knock Out Roses are widely available, and the original Knock Out has been hailed by programs like Texas AM's Earthkind initiative for its hardiness, disease resistance and sustainability. The roses are adaptable to a wide range of climates, including those that experience extremely cold winters. However, they have also been criticized as colorful but generic, with little individual character and minimal scent. Though the Knock Outs have an upright growth habit, they do not provide the long stems that are desirable for cut flowers.
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