Rose (Rosa 'Knock Out') in the Roses Database

Data specific to Roses (Edit)
Bloom size:	Medium: 2-3"
Bloom shape:	Other: Saucer-shaped
Petal count:	semi-double: 8-15 petals
Rose bloom color:	Red blend
Extra Bloom Info:	Single to semi-double, in small clusters
Rebloom:	Excellent
Class:	Shrub
Extra Color Info:	Cherry red
Growth Habit:	Medium, 2-4 feet, bushy
Fragrance:	Mild
Misc:	Shade tolerant
Hybridizer & year:	William J. Radler, 1988
Optimal growing zones:	USDA zone 4 and warmer
Awards:	Earth-Kind Rose ADR: 2002 AARS: 2000

General Plant Information (Edit)
Plant Habit:	Shrub
Life cycle:	Perennial
Sun Requirements:	Full Sun Full Sun to Partial Shade
Soil pH Preferences:	Moderately acid (5.6 – 6.0) Slightly acid (6.1 – 6.5) Neutral (6.6 – 7.3) Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness:	Zone 4b -31.7 °C (-25 °F) to -28.9 °C (-20 °F)
Plant Height:	2-4 feet
Plant Spread:	2-3 feet
Leaves:	Deciduous
Flowers:	Showy Fragrant
Flower Color:	Red
Flower Time:	Spring Summer Fall
Uses:	Cut Flower
Wildlife Attractant:	Bees Butterflies
Propagation: Other methods:	Cuttings: Stem Cuttings: Tip
Miscellaneous:	With thorns/spines/prickles/teeth
Awards and Recognitions:	Texas Superstar® Other: Australian National Rose Trials Gold Medal 2003
Parentage:	seedling x seedling
Child plants:	6 child plants

Alternative cultivar names:

'Knock Out'
'RADrazz'
'Purple Meidiland'

Common names

Rose

Also sold as:

Knockout

Photo Gallery

Uploaded by joannakat

Location: My garden in the Northeast.
Date: 2014-09-18

Uploaded by _Bleu_

Location: Bolstridge Farm entrance
Date: 2016-04-18
Our 22 Knock Out roses are awesome as all plants are in blossom!

Uploaded by SteveandJeannie

Location: Northeastern, Texas
Date: 2013-05-01

Uploaded by wildflowers

Location: Temple, Texas
Date: 2021-05-14
Red Blooms fade to a pinker color as they age.

Uploaded by Peggy8b

Location: Clinton, Michigan 49236
Date: 2016-09-08
"Rosa 'Radrazz', 2016, KNOCKOUT™ Shrub Rose, ROE-zuh, 3x3 ft Ro

Uploaded by frankrichards16

Uploaded by piksihk

Location: Temple, Texas
Date: April 2019
In my side garden, Temple, TX

Uploaded by Peggy8b

Uploaded by frankrichards16

Location: Clinton, Michigan 49236
Date: 2017-06-03
"Rosa 'Radrazz', 2017, KNOCKOUT™ Shrub [Rose], ROE-zuh, 3x3 ft

Uploaded by frankrichards16

Location: my garden in Dawsonville, GA (zone 7b north Geogia mountains)
Date: 2022-05-09
hedge of 12 knockout rose plants, pruned each January to 4-ft tal

Uploaded by LoriMT

Location: Gause, Texas
Date: 2020-04-27
On rural property Central TX

Uploaded by Peggy8b

Location: Temple, Texas
Date: 2021-11-02
A surviving plant after the Texas Feb. 2021 epic freeze/snow/ice

Uploaded by Peggy8b

Location: Daytona Beach, Fl
Date: March 20, 2011

Uploaded by plantladylin

Location: Clinton, Michigan 49236
Date: 2018-09-12
"Rosa 'Radrazz', 2018 photo, Common Name: KNOCKOUT™ Shrub Rose,

Uploaded by frankrichards16

Location: my Zone 7b garden in North Georgia Mountains
Date: 2023-05-30

Uploaded by LoriMT

Location: my garden in Dawsonville, GA (zone 7b north Geogia mountains)
Date: 2021-05-23

Uploaded by LoriMT

Location: Daytona Beach, Florida
Date: 2014-01-04

Uploaded by plantladylin

Uploaded by JebobaTea

Location: Daytona Beach, Fl
Date: December 19, 2010

Uploaded by plantladylin

Location: my garden, NC Zone 7B
Date: 2010-05-14
This rose is lightly fragrant. I understand they are not supposed

Uploaded by sandnsea2

Location: Gause, Texas
Date: 2020-04-15
On our Central TX rural property

Uploaded by Peggy8b

Uploaded by robertduval14

Location: Daytona Beach, Florida
Date: 2012-06-02
I haven't pruned this one in a few months and decided to tie some

Uploaded by plantladylin

Location: Daytona Beach, Florida
Date: 2012-07-14

Uploaded by plantladylin

Uploaded by admin

Location: Ann Arbor, Michigan
Date: 2020-09-10
Trio of Roses (Rosa 'Knock Out')

Uploaded by dnrevel

Location: Daytona Beach, Florida
Date: 2012-11-03

Uploaded by plantladylin

Uploaded by kassiap

Location: Daytona Beach, Florida
Date: 2013-01-04

Uploaded by plantladylin

Location: Gause, Texas
Date: 2020-06-09
Very dark blooms at first, fading to dark pink and then a lighter

Uploaded by Peggy8b

Location: Maryland
Date: 2015-10-04
Blooming in mid-October

Uploaded by Catmint20906

Location: Daytona Beach, Fl
Date: December 16, 2010

Uploaded by plantladylin

Location: Daytona Beach, Florida
Date: 2013-01-25

Uploaded by plantladylin

Uploaded by piksihk

Uploaded by piksihk

Location: my garden zone 7b NC, USA
Date: 2013-09-03

Uploaded by sandnsea2

Location: in front of my house
Date: Sept.
I have 5 rose bushes , one for each of my siblings, and my self.

Uploaded by terimcintire

Location: Daytona Beach, Florida
Date: 2014-02-27

Uploaded by plantladylin

Location: Arbor Gate Nursery, Tomball, TX
Date: 2013-10-05

Uploaded by jon

Location: Daytona Beach, Florida
Date: 2013-04-17

Uploaded by plantladylin

Location: Daytona Beach, Florida
Date: 2012-06-28

Uploaded by plantladylin

Uploaded by plantladylin

This plant is tagged in:

Comments:

Posted by wildflowers (North East Texas - Zone 7b) on Aug 27, 2014 11:49 AM concerning plant:

These are really carefree roses and heavy bloomers. I have three different Knock Out roses and one of them unexpectedly has a nice rose scent. I find the color beautiful and soothing to look at. Deadhead them and they will continue to bloom all summer long.

Reply to this comment
Posted by Newyorkrita (North Shore, Long Island, NY ) on Feb 7, 2014 6:54 PM concerning plant:

Knock Out is a wonder. A perfectly disease-free rose covered in blooms all season long. I must say it is more like owning a flowering shrub than most roses. Knock Out is the rose for people who think they can't grow roses or don't want anything fussy or harder to take care of.

Reply to this comment
Posted by sandnsea2 (Cape Cod, MA, USA - Zone 7a) on Oct 2, 2011 4:16 PM concerning plant:

Unbelievable! Blooming from spring through fall here in Zone 7B. Everyone comments on it. Carefree and beautiful anywhere. Love this rose. Never thought I would, as I have mostly David Austin roses, but you have to admire the tenacity of this big performer.

Reply to this comment

Plant Events from our members
piksihk	On December 31, 2019	Bloomed Few bushes in back have blooms
piksihk	On December 1, 2015	Bloomed

» Post your own event for this plant

Discussion Threads about this plant

Thread Title	Last Reply	Replies
Wow! by zuzu	Jun 18, 2012 3:56 PM	3

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Roses Rose (Rosa 'Knock Out')

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Rose (Rosa 'Knock Out')