Fact sheet: Knock Out Rose ‘Radrazz’


Knock Out ®
2000 AARS Winner
2004 Texas Superstar™
Rosa ‘Radrazz’ PP#11836, Canadian PBR#0993
Varietal Name: ‘Radrazz’

Introducer: The Conard-Pyle Co.Breeder: William Radler, Milwaukee Wisconsin
Type: Landscape shrub rose
Zone: USDA 4–10

The Bud
Form: Pointed Ovoid
Color: Cherry Red
Size: SmallThe Bloom
Color: Deep cerise, cherry red
Form: Flat Cup
Number of Petals: Range 7-11, Average is 10
Diameter: 3 – 3 ½ ” in diameter, average
Fragrance: Light tea rose, slightly spicy

The Plant
Vegetation: Vigorous
Habit: Compact, mounded and bushy
Inflorescence: 1 to 5 flowers per cluster, up to 25 blooms per flowering branch
Foliage: Deep mossy green with blue and maroon highlights
and a maroon underside – distinct glaucous appearance
Fall Foliage: Deep, lustrous purple with rich maroon undertones
Disease Tolerance: Totally resistant to rose black spot.
Tolerant of Downy Mildew
Flowering: Continuous from late spring to frost
Height x width: 3-4’ x 3-4’

The Knock Out® rose will find a permanent home in your garden. This absolutely carefree landscape rose is a breakthrough in disease resistance. Fluorescent cherry red blossoms attract attention all summer and give way to deep purple fall foliage coloring your garden with three seasons of interest. You don’t have to waste time removing old flowers from this blooming machine. The self-cleaning Knock Out® rose takes the maintenance out of roses. Hardy, drought tolerant upon establishment, this rose is a carefree, show-stopping Star®!

Planted in Nassau County Extension Demonstration Garden


Posted: May 28, 2017

Category: Florida-Friendly Landscaping, Home Landscapes
Tags: Demonstration Garden, Factsheet, Knockout Rose, €Radrazz’

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