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Rosa chinensis (Rose, Knock Out®)

Rose, Knock Out®

Rosa chinensis 'Radrazz'  PP#PP 11836 CPBR#0993

Originally developed by William Radler, Conard Pyle holds the patent on one of the most popular line of roses that have reinvigorated roses for the Texas landscapes – the Knock Out Roses. The original of several cultivars, ‘Radrazz’ Knock Out Rose is highly resistant to diseases that plague other roses, while being very tolerant of hot and dry climates familiar to Texas. Since introduction, it has become the fastest selling new rose of all time.

The single blooms are a deep red cherry color, and appear abundantly in the late winter for a week or two, then drop off only to continue blooming again throughout the summer until first real frost. To maximize the amount of blooms, trimming the shrub midwinter will encourage more branches to fill out the plant, thus more blooms.  The foliage is a dark purple hue as it emerges, turning dark green for the summer. In the fall it turns a dark burgundy.

Won the All-America Rose award in 2000 when introduced, and Texas Superstar in 2004; Knockout has become a commonplace addition to any landscape since.  

Medium Hedge
Focal Point

Flower Color:




4-5 Feet



4-5 Feet

USDA Hardiness Zone 6b

Characteristics & Attributes

Deer Tolerance
Full Sun
Semi Evergreen
Water Needs