'White Knock Out ®' Rose

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'White Knock Out ®' rose Description

My HMF:

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Photo courtesy of Johno

Availability:

Commercially available

Synonyms:

• Knock Out White ®
• RADwhite
• Rosa White Out ™
• White Out

HMF Ratings:

27 favorite votes.
Average rating: GOOD+.

Origin:

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'.

Class:

Shrub.

Bloom:

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.

Habit:

Medium, bushy, compact. Matte, medium green foliage. 3 to 7 leaflets.

Height: 42" (105cm). Width: 42" (105cm).

Growing:

Can be used for beds and borders, container rose or garden. Disease susceptibility: very disease resistant.

Patents:

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

Ploidy:

Tetraploid

Parentage:

RADmom × RADsweet

Notes: