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Shrub Rose 'White Out'


Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: White Out
Additional cultivar information:(PP20273, aka Radwhite, Rosa White Out)
Hybridized by Radler
Registered or introduced: 2008
» View all varieties of Roses




36-48 in. (90-120 cm)


36-48 in. (90-120 cm)


USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Bloom Color:

White (w)

Bloom Shape:


Flower Fragrance:

No fragrance

Slightly Fragrant

Bloom Time:

Blooms repeatedly



Patent Information:


Other Details:

Resistant to black spot

Resistant to rust

Pruning Instructions:

Blooms on new wood; prune early to promote new growth

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

From hardwood cuttings

By grafting

By budding

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Tuscaloosa, Alabama

Murrieta, California

Chicago, Illinois

Sioux Center, Iowa

Beverly, Massachusetts

Southborough, Massachusetts

Bronx, New York

Lewisville, North Carolina

Brentwood, Tennessee

Copperas Cove, Texas

Richmond, Texas

Portsmouth, Virginia

show all

Gardeners' Notes:


On Mar 5, 2015, DaylilySLP from Dearborn Heights, MI (Zone 6a) wrote:



On Jan 21, 2015, coriaceous from ROSLINDALE, MA wrote:

On the plus side, this cultivar is vigorous and highly resistant to black spot and powdery mildew---it performs well without any fungicide here in black spot hell. Very floriferous, blooms almost continually through the season.

But I'm not fond of the flowers. They start looking ragged shortly after opening, and demand constant deadheading, as is common among white roses. They do not shed their brown petals quickly enough for my liking.

The New York Botanical Garden gives this rose a very high performance rating in its Peggy Rockefeller Rose Garden, where no fungicides are used.

This rose is considered hardy to Z4.


On Apr 1, 2012, Sandwichkatexan from Copperas Cove, TX wrote:

Beautiful! I planted these in a row with home run red and the red and white row of small shrubs they make frame my outside flowerbed beautifully .


On Apr 26, 2010, lucymiu from Tuscaloosa, AL wrote:

I have run over my poor "White Out" rose three times now...knocking off bits each time and it still hasn't stopped blooming even for a moment!


On Sep 7, 2009, connietn from Brentwood, TN (Zone 7a) wrote:

I got seven of these this year to edge an area of a white garden. The first month or so they were pathetic - so bad I almost considered taking them out. Am I glad I didn't! They started to put on new growth at an amazing rate, and have bloomed non-stop since the spring. It's September now and they're still gorgeous. They are doing as well or better than my red knockouts. I believe they have bloomed even more. Highly recommend!