Double Knock Out® Rose

Double Knock Out® Rose is the rose that changed everything about how home gardeners think about growing roses. Bred by Will Radler in Milwaukee, Wisconsin and released in the early 2000s, it delivers the classic rose shape and cherry-red beauty most gardeners dream of — with twice the petals of the original Knock Out® — and virtually none of the maintenance that traditional roses demand. It blooms continuously from late spring through the first frost, cleans itself without deadheading, and resists disease with almost no intervention. No wonder it won an Australian Gold Medal in 2004 and earned the Master Rose title from the American Rose Trials for Sustainability in 2019.

Twice the Petals, All Season Long

The “Double” in Double Knock Out® isn’t just a name — it’s a visual upgrade. The lightly fragrant, cherry-red double blooms have twice the petal count of the original, giving them the full, classic rose silhouette that makes them so striking as a specimen plant, hedge, or container rose. Deep purplish-green foliage sets off the blooms beautifully, and the self-cleaning flowers mean no spent bloom removal — they simply drop and new buds take their place.

Award-Winning Disease Resistance

One of the most celebrated qualities of the Knock Out® family is resistance to black spot and downy mildew — the two diseases that defeat more home rose growers than anything else. Double Knock Out® carries that same strong resistance, meaning beautiful blooms season after season without a demanding spray program. Heat and drought tolerant once established, it’s truly a rose for every gardener regardless of experience level.

More Than a Garden Plant — Edible Petals Too

Chemical-free Double Knock Out® petals are edible and genuinely useful in the kitchen. Add color to teas, lemonades, and juices, infuse into butter or jams, steep for homemade rose water, or dry for potpourri and craft projects. And as a cut flower, the plant provides an almost endless supply of fresh blooms for arrangements throughout the growing season.

Why Gardeners Love Double Knock Out®

• Continuous blooms — late spring through first frost without deadheading
• Twice the petals — full, classic double rose form in cherry red
• Award-winning variety — Australian Gold Medal (2004), Master Rose (2019)
• Exceptional disease resistance — resists black spot and downy mildew
• Heat and drought tolerant — thrives with minimal intervention once established
• Edible petals — versatile in the kitchen and for crafts
• Container friendly — grows beautifully in pots as well as in the landscape

This variety may be protected by USPP #16,202 or other patents and is sold under license from the patent owner. Rosa ‘Radtko’.