Knock Out roses come in red, pink and yellow; one variety is a combination of both pink and yellow. The Knock Out and Double Knock Out varieties bloom in red, while the Blushing Knock Out and Pink Knock Out varieties range from deep pink to a paler pink. The Sunny Knock Out rose is yellow, and the Rainbow Knock Out is yellow on the inside and pink on the border.Continue Reading
Knock Out roses grow to a height of about 4 feet, although they can be pruned to shorter heights. They prefer full sun and well-drained, fertile soil. If growing in a hedge, space the Knock Out rose plants about 4 feet apart to allow for growth and air circulation. The flowers should be fed a fertilizer formulated specifically for roses at the end of each bloom cycle. The faded flowers do not need to be deadheaded, as they are self-cleaning.
Knock Out roses should be pruned before the plant awakens from dormancy. Late winter and early spring are the best times. Dead or damaged wood should be removed and interior stems thinned. Prune out any stems that interfere with the desired shape of the plant. New growth can be stimulated by removing one-third of the old branches every three years.Learn more about Outdoor Plants & Flowers