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'White Out' rose Description
'White Knock Out ®' rose photo
Photo courtesy of Johno
Commercially available
HMF Ratings:
27 favorite votes.  
Average rating: GOOD+.  
Bred by William J. Radler (United States, before 2008).
Introduced in United States by Conard-Pyle (Star Roses) in 2009 as 'Rosa White Out'.
Introduced in United States by Star Roses & Plants (California) in 2018 as 'White Knock Out'.
Introduced in Australia by Wagner's Rose Nursery in 2024 as 'Knock Out White'.
Cream, ages to white .  None to mild, citrus fragrance.  up to 10 petals.  Average diameter 2.75".  Medium, single to semi-double, in small clusters bloom form.  Prolific, continuous (perpetual) bloom throughout the season.  
Medium, bushy, compact.  Matte, medium green foliage.  3 to 7 leaflets.  

Height: 42" (105cm).  Width: 42" (105cm).
Can be used for beds and borders, container rose or garden.  Disease susceptibility: very disease resistant.  
United States - Patent No: PP 20,273  on  8 Sep 2009   VIEW USPTO PATENT
Application No: 12/216,128  on  30 Jun 2008
Inventors: Radler; William J. (Greenfield, WI)
Assignee: CP Delaware, Inc. (Wilmington, DE)
The female parent (i.e., the seed parent) was the `Radmom` variety (non-patented in the United States). The `Radmom` variety is an open pollinated seedling of the `Bucbi` variety (U.S. Plant Pat. No. 4,225) which is being marketed under the CAREFREE BEAUTY trademark. The male parent (i.e., the pollen parent) of the new variety was the `Radsweet` variety (non-patented in the United States). ....description is based on the observation of two-year-old specimens of the new variety