Article (magazine)  (2010)  Page(s) 1781.  
 
Double Knock Out ® (RADtko), under consideration for future Earth-Kind rose trials, Shrub, 2004, William Radler, Ploidy 3x ....

Website/Catalog  (2007)  Includes photo(s).
 
Award: Gold Medal, Australian Rose of the Year, Marion de Bomhe Memorial Award, Best Floribunda (Rose Hills award).
Name: Double Knock Out®
Type: Floribunda, Fragrance: Mild
Habit: Compact red buds with robust dark green foliage and deep maroon tips
Breeder: William Radler for Meilland International, Tassin, France
Exhibitor: Corporate Roses, SA