Family Rosaceae (ro-ZAY-see-ee) Genus Rosa (RO-zuh) Cultivar Double Knockout Cultivar Information Hybridized by Radler; Year of Registration: 2004
Class Double Bloom Shrub Bush Height 4-6 ft. Spacing 3-4 ft. Sun Exposure Sun to Partial Shade Bloom Color Deep Pink, Light Pink Bloom Time Blooms Repeatedly Foliage Moderately Thorny Shrub
Hardiness Zone 6a to -10 F Zone 6b to -5 F Zone 7a to 0 F Zone 7b to 5 F
Zone 8a to 10 F Zone 8b to 15 F Zone 9a to 20 F Zone 9b to 25 F
Soil pH Requirements 5.6 to 6.0 (Acidic) 6.1 to 6.5 (mildly acidic)
Water Requirements Average water needs
Pruning Instructions Prune by 1/3 in winter if desired Blooms on new wood; prune early to promote new growth
Propagation Methods From softwood cuttings, semi-hardwood cuttings From hardwood cuttings By budding or grafting
Patent Information Not Patented
Other Details Resistant to black spots, mildew, and rust Upright growth habit Flowers are not fragrant
Freezing Temps by Year: 2009-2010 Year: Freezing temps 12/09 & 01/10 * moderate winter 2010-2011 Year: Freezing temps 01/11 & 02/11 * moderate winter 2011/2012 Year: Freezing temps 12/11 & 01/12 * mild winter 2012/2013 Year: Freezing temps 12/12 & 01/13 * very mild winter
