Knock Out® Roses, the easy-care roses hybridized by Wisconsin-born William J. (Bill) Radler, won the All-American Rose Selection (AARS) award in 2000. The Knock Out® Rose, Radler’s first commercial success, has broken all records for sales of a new rose. Today, the Knock Out® Rose is the most widely sold rose in North America.
The Knock Out® Family of Roses is highly disease-resistant roses, easy to grow and bloom repeatedly and profusely from spring until frost with healthy foliage that does not need the chemical spray program. Blooms are fire engine red in cool weather and cherry red in the summer months. The foliage is dark green and leathery with a burgundy hue. They are low-maintenance roses with a bloom cycle of about every 5-6 weeks and continue until the first hard frost. All of the Knock Out® Roses are self-cleaning, so there is no need to deadhead. If unpruned, The Knock Out® Family of Roses can easily grow more than 3-4’ wide x 3-4’ tall in two years. A once-a-year pruning (to about 12” above the ground) in early spring (after the last hard frost) is also recommended for maximum performance. The Knock Out® Family of Roses is winter hardy to USDA Zone 5 and heat tolerant throughout the entire U.S. They thrive in almost every area of the country.
The Knock Out® Family of Roses can fit into any landscape. Plant them individually among shrubs, annuals, and perennials in mixed beds and borders, in large groups to create a colorful hedge or along a foundation to provide a bright border.
The Conard-Pyle Co./Star® Roses is the proud distributor of all members of The Knock Out® Family of Roses. Bill Radler was the 2008 recipient of the Great Rosarians Award for hybridizing disease-resistant roses, particularly the Knock Out® family of roses. He has been leading the way to develop new disease-resistant roses for American gardeners. Bill Radler has revolutionized the way we think of roses. With the creation of The Knock Out® Rose, many say he single-handedly brought rose genetics from the 20th Century into the 21st Century.
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