Whats the difference between Knockout and Double Knockout roses?

What good hardscaping you have to work with! Yes, as suggested already, take out the three "thumb" bushes up against the house for a start. I would also remove the little bushes from in front of the retaining wall unless you can get them to spread side-to-side. The rock-bush-rock sequence is too rigid with the bushes pruned as they are now. Because you say you have a "black thumb," do some research about native plants for your area. These will be the easiest to grow for a "black thumb." Perennials will require less work, as they come up year after year. One suggestion for choosing flowers so that something will be in bloom every month - go to your local garden center each month and see what is blooming! Buy an odd number of these every month (three, five, seven...) and add them near plants whose blooms are nearly gone. Keep this up for a year and see what you think. Gardens evolve, and your plant choices will most likely change a bit from year to year as well. As already suggested, plant a narrow garden strip along the upper edge of the retaining wall, and choose plants that will "spill" over to soften the masonry. Plant tall flowers with bright blossoms in the garden where the "thumb trees" are now, with some shorter flowers in front of them to hide the long stems. Also plant clumps of tall flowers just in front of the retaining wall for some height and to soften the edge of the masonry. The "spill" plants will show if you plant the tall flowers in clumps instead of lined up like sailors. Plant shorter flowers in front of the taller ones, and experiment with blooming ground cover near the concrete borders of the garden. Be sure to keep in mind which plants bloom early in the season and which ones bloom later so you won't have bare spots. To add more color and height, I would plant a Bradford Pear in the center of the upper grass area (in front of where the middle "thumb tree" is now). Bradford Pear trees have pretty white blossoms in spring, shiny almost-round leaves in summer, bright red leaves in autumn, and a goblet-shaped branch pattern showing in winter. They are ornamental and do not produce fruit. Please post progress and "after" photos.

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I would like to plant a red knockout rose hedge behind my house. The problem is, I can't make up my mind whether to get Knockout or Double Knockout roses for this. In my mind DKO has prettier blooms than KO, but they are also much smaller, so I wonder which is more showy for mass planting.

I am also under the assumption that both KO and DKO are equally hardy, disease-resistant and have very similar height and growing habits, or am I wrong?

So, which do you think I should get? :)

Thanks for any inputs!

Whats the difference between Knockout and Double Knockout roses?

Research and development continue each year to find new members of The Knock Out® Family of Roses. To assure that these new introductions meet the standards set by the original Knock Out®, all test varieties are evaluated for several years in a wide variety of climates and growing conditions at locations across the country. Only a fraction of the test varieties will meet the Knock Out® standards and will be introduced.

Knock Out®

‘Radrazz’ 

The original member of The Knock Out® Family, this shrub rose set a new standard in disease resistance with little to no maintenance required. The bloom cycle produces rich cherry red, hot pink blooms that will continue until the first hard frost. Black spot resistant, drought-tolerant and self-cleaning.

Whats the difference between Knockout and Double Knockout roses?

color:  Cherry red, hot pink
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–4’ w
foliage:  Deep, purplish green
zone:  5–11
breeder: Will Radler
scent: Subtle sweet 

awards:
All America Rose Selections 2000
• 2002 ADR Award, Germany
• American Rose Society 2003 David Fuerstenburg Prize, Awarded to William Radler for the Development of the Outstanding Knock Out®
• International Rose Test Garden, Portland, Oregon, Gold Medal Award 2003
• The American Rose Society Members Choice Award 2004
• 2018 Inductee into the World Federation of Rose Societies Rose Hall of Fame

Double Knock Out®

‘Radtko’  PP 16,202  CPBR 3,104 

From the same cross that produced the original Knock Out®, Double Knock Out® represents the next generation in The Knock Out® Family of Roses. The full, double flowers look just like a classic rose. It is as resistant to black spot as the famous original, has the same bloom cycle, and is slightly more winter hardy. 

awards:
• Australian Gold Medal 2004
• American Rose Trials for Sustainability, Master Rose 2019

Whats the difference between Knockout and Double Knockout roses?

color:  Cherry red
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–4’ w
foliage:  Deep, purplish green
zone:  5–11
breeder:  Will Radler
scent: Sweet, fruity 

Pink Knock Out®

‘Radcon’ PP 15,070 CPBR 2,044

Single petals, just like the original, but in a beautiful shade of bright pink! Like other members of The Family, Pink Knock Out® is black spot resistant, drought-tolerant and self-cleaning. A perfect companion to other shrubs, roses and perennials.  See some of our pairing recommendations.

awards:
• American Rose Trials for Sustainability, Master Rose 2019

Whats the difference between Knockout and Double Knockout roses?

color:  Bright pink
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–4’ w
foliage:  Deep, mossy green
zone:  5–11
found by: Israel Montesino
sport of: Knock Out®

Pink Double Knock Out®

‘Radtkopink’ PP 18,507 CPBR 3,757

A bright, bubble gum pink version of Double Knock Out® that is very stable and unfazed by the heat. Classically shaped flowers bloom from early spring to the first frost. This plant has superior drought tolerance once established. 

Whats the difference between Knockout and Double Knockout roses?

color:  Pink
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–4’ w
foliage:  Deep, mossy green
zone:  5–11
found by: Jerome A. Lavallee, Jason N. Brown and David F. Cockcroft
sport of: Double Knock Out®

Blushing Knock Out®

‘Radyod’ PP 14,700 CPBR 2,045

With similar flowers to Knock Out®, this variety has light pink blooms that, with age, fade to a delicate, subtle pink. This shrub rose is a versatile addition to any landscape. 

awards:
• American Rose Trials for Sustainability, Master Rose 2019

Whats the difference between Knockout and Double Knockout roses?

color:  Light pink
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–4’ w
foliage:  Mossy green with blue hues
zone:  5–11
found by: John M. Bell
sport of: Knock Out®

Rainbow Knock Out®

‘Radcor’ PP 17,346 CPBR 3,444

With uniquely colored, coral-pink blooms with yellow centers, Rainbow Knock Out® is more compact than the other family members. New foliage first appears deep burgundy, then ages to dark green. 

Whats the difference between Knockout and Double Knockout roses?

color:  Coral pink with yellow center
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–4’ w
foliage:  Dark green
zone:  4–11
breeder: Will Radler

Sunny Knock Out®

‘Radsunny’ PP 18,562 CPBR 4,875

This rose from Will Radler is one of the most fragrant members of The Family. It has a slightly more upright habit with bright yellow flowers that fade quickly to a pastel cream color. The yellow color stays more intense during cooler times of the year. 

Whats the difference between Knockout and Double Knockout roses?

color:  Yellow to cream
flowering:  Abundant and continuous
habit:  Bushy
mature size:  On average  3–4’ h x 3–5’ w
foliage:  Dark green, semi-glossy
zone:  4–11
breeder:  Will Radler
scent:  Citrus

Coral Knock Out®

‘Radral’ PP 19,803

The unique coral color of this rose is even stronger in hot, humid climates. It blooms from spring through fall and maintains an upright to rounded habit. Young foliage is bronze-red. 

awards:
• American Garden Rose Selections 2018 Regional Award
• American Rose Trials for Sustainability, Master Rose 2021

Whats the difference between Knockout and Double Knockout roses?

color:  Brick orange fading to coral
flowering:  Abundant and continuous
habit:  Bushy, upright
mature size:  On average 4½’ h x 4½’ w
foliage:  Medium green, matte
zone:  5–11
breeder: Will Radler
scent: Slight clean 

Peachy Knock Out®

‘Radgor’ PP 25,628

Blooms from spring through fall with attractive pink flowers. The overall color effect is peach, achieved with the combination of pink petals that become yellow in the center. The color will be much more intense with the cooler temperatures in the spring and fall. 

awards:
• American Garden Rose Selections 2017 Regional Award 
• American Rose Trials for Sustainability, Master Rose 2018

Whats the difference between Knockout and Double Knockout roses?

color:  Shell pink with yellow center
flowering:  Abundant and continuous
habit:  Mounding
mature size:  On average  3’ h x 3–4’ w
foliage:  Deep green and semi-glossy
zone:  4–11
breeder: Will Radler

White Knock Out®

‘Radwhite’ PP 20,273

An excellent shrub rose that stands out in the landscape due to the contrast between pure white blooms and very dark green foliage. It blooms from spring through fall, maintaining a compact habit.  

awards:
• 2011 Gold Medal award from Rose Hills Company International Rose Trials
• Blue Ribbon™ Winner for outstanding, low water performance in 2017-2019 WUCOLS trials
• American Rose Trials for Sustainability, Master Rose 2021

Whats the difference between Knockout and Double Knockout roses?

color:  White
flowering:  Abundant and continuous
habit:  Compact, bushy
mature size:  On average  3½’ h x 3½’ w
foliage:  Very dark matte green; young foliage is almost black
zone:  4–11
breeder: Will Radler
scent:  Light floral

Petite Knock Out®

‘Meibenbino’  PP 30,811  U.S. Pat. No. 11,252,92 CPBR 6,553

Petite Knock Out® is the first-everminiature Knock Out® Rose! It has the same flower power and easy care as others in The Family, but in an adorable, compact size! Not only is the plant petite, but it displays smaller blooms than other Knock Out® Roses. Plant in decorative containers for your porch or patio, or in groups for a dramatic pop of bold red color.

Whats the difference between Knockout and Double Knockout roses?

color:  Fire engine, non-fading red
flowering:  Abundant and continuous
flower size: 1 ½” in diameter on average
habit:  Compact and bushy
mature size:  Mature plants are 18” tall
foliage:  Dark green, extremely glossy
zone: 4–10
breeder: Meilland®

Which Knock Out roses are the best?

Here are the twelve best knockout roses that will make your garden look outstanding..
Brighter Blooms Store's Double Knockout Rose Bush. ... .
Knockout Store Double Red Blooms. ... .
Brighter Blooms Stores Yellow Knockout Roses. ... .
Spring Hill Nurseries Sunny Knockout Rose. ... .
Perfect Plants Sunny Knockout Roses. ... .
GARDENS ALIVE!.

What is Double Knockout Rose?

From the same cross that produced the original Knock Out®, Double Knock Out® represents the next generation in The Knock Out® Family of Roses. The full, double flowers look just like a classic rose. It is as resistant to black spot as the famous original, has the same bloom cycle, and is slightly more winter hardy.

Are there different types of Knock Out roses?

You have a few different choices when it comes to Knock Out® Roses. You can have either Double or Single blooms. The Red and Pink varieties have the Double blooms and the Yellow, White and Blushing varieties have the single blooms.

What is double knockout?

A rare fight-ending occurrence in several full-contact combat sports in which the participants knock each other out at the same time and are both unable to get back up before the count is over.