Commercially available

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

26 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'.

Shrub.  

Cream buds open to white flowers..  Mild, citrus fragrance.  Average diameter 3.5".  Medium, single (4-8 petals) bloom form.  Prolific, continuous (perpetual) bloom throughout the season.  

Medium, bushy, compact.  Matte, dark green foliage.  
Height of 42" (105 cm).  Width of 42" (105 cm).

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

A new and distinct shrub rose plant is provided that abundantly and
substantially continuously forms attractive single blossoms that
initially are light yellow in coloration and change to white when fully
mature. The plant exhibits vigorous vegetation and a bushy growth habit.
The foliage is dark green with a matte finish. Excellent resistance to
blackspot has been experienced. The plant is well suited for growing as
attractive ornamentation in parks and gardens.

Inventors:	Radler; William J. (Greenfield, WI)
Assignee:	CP Delaware, Inc. (Wilmington, DE)