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Double Knock Out®

The medium red colored shrub rose named Double Knock Out.
This rose's location in the garden is SW 05.
This rose's location in the garden is SW 05.
  • Classification:  Shrub
  • Flower Color:  medium red
  • Flower Size:  3 inches
  • Flower Form:  small clusters with classic, high-centered form
  • Petal Count:  15-18
  • Fragrance:  none to mild
  • Repeat Bloomer:  yes
  • Foliage:  small, medium green, semi-glossy
  • Plant Height:  3-4 feet
  • Plant Width:   3-4 feet
  • Growth Habit:  bushy
  • Disease Resistant:  very
  • Hybridizer:  William Radler
  • Registered:  2004
  • Parentage:  ‘Carefree Beauty’ x ‘Razzle Dazzle’ x unknown seedling x unknown seedling
  • ARS* Rating: 8.1 (a solid to very good rose)  
    *American Rose Society Rating

Awards:
  • 2007  Gold Medal, Best Floribunda, Best in Trial—National Rose Trials (Australia)
  • 2010 First Prize Floribunda—La Tacita International Trials for New Roses (Italy)
  • 2011 Bronze Medal—Nagasaki Rose Trials (Japan)

Notes:
  • “It’s been 20 years since William Radler introduced the Knock Out rose (2000), a rose whose self-pruning habits, generous blooms and disease-resistant properties quickly became the industry standard. In fact, Radler recently was named one of three winners of the 2020 Award of Excellence from St. Louis-based National Garden Clubs, Inc., the largest volunteer gardening organization in the world, for his creation that revolutionized the rose-growing and gardening industries.

  • The royalties earned from the discovery of the Knock Out rose — which evolved out of Radler's hobby of cultivating and hybridizing roses — made the garden possible. “When Knock Out royalties started coming in, I decided that I wanted to create the garden of my dreams, and in 2009 the construction started,” he told a reporter visiting the property in Greenfield, Wisconsin, for the first time. Work on the garden is ongoing, but the 77-year-old has plenty of help. A staff of about a dozen people work to manage the gardens and grounds.” --- “Greenfield’s Will Radler” (July 8, 2020) at jsonline.com
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Love is a Rose. Our
Our "Love is a Rose" program offers a great gift idea for your loved ones and also helps add or replace rose bushes in the garden. Clicking the link above will take you to our KCRS site to begin the process.

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  • Home
  • Rose Directories
    • Roses by Name
    • Roses by Classification
    • Roses by Color
    • Roses by Climbers
    • Roses by Hybridizers
    • Fragrance Awards
  • Garden Map
  • About KCRS
  • KCRS Main Site