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  • Double Knock Out® Rose for Sale

    Double Knock Out® Rose for Sale


Double Knock Out® Rose

Rosa 'Radtko'

$19.95 (8% Off)

1. Size

  • Ships week of Apr 17
  • Shipped in 1 gallon pot

2. Quantity

3. Extras

-t- Planting Mix
Double Knock Out® Rose Planting Mix

Helps your Double Knock Out® Rose get established in a fraction of the time, become more drought tolerant, and grow faster. Here's how:

Beneficial Bacteria... It's like a Probiotic for your tree... creating an explosion of fine hair roots that vastly improves nutrient and water uptake.

Course Organic Compost... loosens and improves all types of soils while promoting proper pH levels. You get better drainage and moisture retention.

Microbial Fertilizers... including Sea Kelp, Yucca, and 100 other elements proven to gently feed your tree without burning the roots.

Use 1 bag of Planting Mix for each plant ordered.

Soil Contents
-t- Root Rocket™ Fertilizer
Root Rocket™ Transplant Fertilizer

2oz. Packet

Get your new plants off to the right start by using Root Rocket™ Transplant.

This soil amendment contains 16 strains of mycorrhizal fungi, biostimulants, beneficial bacteria and Horta-Sorb® water management gel.

Simply sprinkle the product into the planting hole adjacent to the root ball when planting.

The organisms will start to work right away supplying the roots with much needed nutrition.

The specially formulated Horta-Sorb® will reduce transplant stress and aid in water retention.

1 packet per plant

Root Rocket Fertilizer
-t- Planket™ - Frost & Cold Protection
PLanket 10-20 ft.

Protect your sensitive plants and shrubs with the Planket™

Benefits include:

  1. Lightweight fabric allows your plants to breathe while also protecting them from the frost and cold winds.

  2. 10ft. x 20ft. size makes it easy to protect rows of plants all Winter long.


Growing Zones: 5-10
(hardy down to -10℉)

Growing Zones 5-10
You are in Growing Zone: 6

Mature Height:

3-4 ft.

Mature Width:

3-4 ft.


Full Sun, Partial Sun


4 ft.

Growth Rate:


Drought Tolerance:


Botanical Name:

Rosa 'Radtko'

Does Not Ship To:


Learn why we stopped selling bare-root

Double the Petals- Double the Roses!

- One of the longest blooming periods available...
starts late May or early June and lasts until the heaviest
fall frost.
- Even more disease and insect resistant...
(black spot, rust, mildew etc.).
- Virtually maintenance free...
grows thick without pruning back flowers.
- Improved cold hardiness...
thrives in Growing Zones 5-10.

The Double Knock Out® Rose gives you all the amazing characteristics of the original Knock Out® Rose, but with more petals & better disease resistance.

The original Knock Out® Rose quickly became one of the most popular rose bushes in recent history. Finally, a trouble-free rose with brighter, longer lasting blooms.

Amazingly, horticulturists have improved this incredible variety to create the Double Knock Out® Rose.

The Double Knock Out® gives you all the characteristics of the original Knock Out® plus:

When planted in rows, they reach approximately 4 feet in height, making a great hedge or boundary. Use them to add color to your home or a wonderful scent to your back patio.

Thrives in containers or in the ground. This improved variety will even grow in shade... giving you more areas to plant.

With plenty of blooms to spare, you'll enjoy fresh cut roses in your home from spring until fall. Depending on your soil conditions, your blooms can range from dark to light red.

We prune your Knock Out® Roses before we ship them out to give you an explosion of growth shortly after you plant them.

These amazing rose bushes will sell out quickly. We recommend that you order now while supplies are still available.

Customers who bought this item also bought...

Customer Reviews

4.6 / 5.0
93 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Growth Rate
I bought these b/c of the assurance that not much work was required. THESE ROSES HOLD TRUE TO THEIR DESCRIPTION. I ordered 2 3-gallon bushes & a rose tree. I have since ordered 5 more 3-gallon roses & another rose tree. I had roses INSTANTLY after planting & Im no gardener by far. These roses are so trouble-free & I am so pleased! My roses are the talk of my housing community!
January 1, 2013
Double Kbnockouts
What a delight to purchase 20 of these for a garden wall and see them absolutely explode with new growth and height. Actually, I can not believe that we have to deadhead ( remove dead blossom) every third day at this time. I used some iron and a bit of Epsom to get them going and they have survived the cold, freezing and hot 103-plus weather and been a delight to see in the yard. Not as tall yet but they are flowering as the picture here shows. Thank you FGT!
July 15, 2014
over 3 years ago
I had 15 1 gal DK Roses planted 3 years ago. 1st of all I want to say dealing with Fast Growing Trees was a wonderful experience (long story). My puppy got hold of 2 of them before we could get them in the ground and I thought he had killed them. He did stunt their growth because the other 13 are doing fabulous. My husband hates mowing around anything, I put these were he wouldn't have to, and other than the 1st day we planted them I have never even watered them. That says a lot because it gets extremely hot here in S. IN. My husband is so impressed that he wants me to plant more in a another area that he doesn't want to have to weed wack. Unfortunately I'm going to have to wait until next spring to do it, but if he is actually willing to do the planting that SCREAMS beauty and success. I can't wait! I'll keep you posted!!
January 1, 2013
over 5 years ago
Great! Blooms forever! Deer Wont Eat Them!
January 1, 2013
The Double3 Knockout Rose is a great addition to my roses. It has produced a huge number of very bright red roses consistently.
January 1, 2013
I've been so excited for these to come in, waited 2 months. I still planted them and I hope they grow beautifully as everyone says but know one thing: these roses are NOT red! They're fushia/hot pink. The pictures all look red and the description says dark to light ""red."" They're pink if I ever saw pink. I'm disappointed because I specifically looked for red and could have gotten them elsewhere had I known
January 1, 2013
over 4 years ago
We got the roses on a timely basis. They were already blooming. They are growing good and look great. Good Service. Hubert
January 1, 2013
over 5 years ago
Theyre awesome! I planted 8 of the 1 gallon knockout bushes in a 24 foot section of my backyard fence line. I now have superb color in a place that was one quite boring. They grow fast!! I have had many compliments. The color is fantastic.
January 1, 2013
I purchased and planted these roses in September last year. They not only made it through one of the harshest NM winters we have had in a long time, they out bloomed our other pink knoockout roses that were a year older and more established
January 1, 2013
Growth Rate
So far, so good.
Planted them about 3 feet apart, down a 30 inch wide planter, between my driveway and the walkway from the street to my front porch. I put in a drip line down the whole length of the planter, with drip feeds to each plant. It waters once a week. However, my lawn sprinklers tend to wet the planter soil. I treated the soil with compost and sand (bentonite) before planting.
October 11, 2014
over 2 years ago
Growing Zone:

Planting & Care

It's Easy to Plant & Care for Your Double Knock Out® Rose

Double Knock Out® Rose Planting Diretions Your Knockout Roses will thrive in an area the receives full to partial sunlight, and prefer six to eight hours of sunlight a day. Afternoon shade will be more beneficial for your Roses than morning shade.

Your natural soil will be great for your Knock out Roses especially if it's well drained, and isn't too light or sandy. Keep your soil moist, not over saturated. To help hold the moisture in spread mulch around the base of your Knockout roses. Knockout roses prefer to receive water at their bases instead of receiving water from overhead.

You'll see blooms on your Knockout Roses early every Spring, that will last until your first frost. Knockout Roses produce new blooms every four to six weeks and will love it if you give them organic fertilizer once a month after their first blooming cycle.

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 53 questions Browse 53 questions and 136 answers
Why did you choose this?
Fast-Growing-Trees.com Store
In honor of my mom.. She loved roses
Desha T on Feb 26, 2017
Something new-- the double rose
AMY O on Feb 21, 2017
In honor of my mom.. She loved roses
Desha T on Feb 26, 2017
NO,, Not Yet. Will answer next time.
David F. & Ms. P on Feb 23, 2017
Something new-- the double rose
AMY O on Feb 21, 2017
Excited to add some color to my yard. Can't wait to see them!
Jasmine D on Feb 19, 2017
Beautiful and long lasting.
Kathy B on Feb 11, 2017
I choose this rose shrub with the hope it's going to be a cold hardy, drought tolerant and long flowering plant suitable for our northern New Mexico climate. Let's see it it does well.
Ilia A on Feb 5, 2017
duane a on Feb 5, 2017
No one else has it yet in this area I believe.
JOHN D D on Jan 18, 2017
My first experience in a clean slate yard. I want lots of color but low maintenance (hopefully) I'm a newbie to lawn care, and to zone 10
Cheryl P on Jan 2, 2017
MHA975 on Dec 31, 2016
I Love roses... looks good when they are planted along the fence or otherwise use it as your fence.
Crisanne C on Dec 24, 2016
I love the way roses smell and they attract butterflies, bees, etc. which help our environment
Cathie G on Nov 30, 2016
My wife wants a double rose hedge. Whatever she wants she gets.
Ian W t on Nov 30, 2016
Have enjoyed knockout roses for many years but really loved the double.
Adele S on Nov 16, 2016
We have several other double knock out from FGTrees and love them.
Dick M on Nov 10, 2016
Need a nice red color, and easy growing!!
Ken M on Nov 2, 2016
i have wanted them for a while now the time to plant
jimmie w on Nov 2, 2016
I thought this was a cheerful choice for the passing of my friend's grandmother.
Tim and Laura W on Oct 25, 2016
Because my wife loved them and they will be placed at her grave site so that she will have them near her final resting spot.
Eldridge R on Oct 20, 2016
I love ROSES
Kristen J on Oct 17, 2016
to bring color and beauty to my mom's front yard
sandra c on Oct 16, 2016
I read the reviews and the ratings were very good.
Mary T on Oct 15, 2016
color and continuous blooming
J. Kirby B on Oct 15, 2016
Quick and easy way to send a gift to my daughter-in-law after surgery.
Skye M on Oct 6, 2016
This is a great supplier with great products, good communications, top service and does what it preaches. I recommend them highly.
Raul C on Oct 2, 2016
I have never been successful with planting roses. I'm hoping that coming from your company, the rose plant will thrive.
cleotilde g on Oct 1, 2016
In memory of my late father. God rest his soul
John T on Sep 27, 2016
I wanted roses and these are gorgeous.
Janet M on Sep 27, 2016
Patricia L on Sep 25, 2016
size and color
ann d on Sep 23, 2016
Sharon R on Sep 23, 2016
Online research confirmed that this rose bush is hardy and not eaten by deer.
Helmut W G on Sep 22, 2016
I chose these for foundation plantings because they are low-maintenance and for their all-season color.
Judi J on Sep 20, 2016
I wanted a rose bush but am not the avid gardener. This seems like a great fit for me.
Idella B on Sep 19, 2016
No shipping cost.
Roy A on Sep 18, 2016
They are just so Beautiful Strong growers. They Rose that keeps on Giving.!!!!
linn j on Sep 10, 2016
to make my front porch look pretty and bouquet to smell the natural fragrance of nature
Ben J on Sep 8, 2016
Kabir K on Sep 8, 2016
It's pretty, grows in containers, low maintenance and provides natural privacy
Jessica H on Sep 6, 2016
Absolutely beautiful to look at
Mary L on Sep 6, 2016
Love the color size and the amount of flowers.
Debra N on Sep 4, 2016
the double knock out rose looked like a real tough rose against disease and some insects, but I liked the size it would grow to and wanted a splash of color where they're to be planted.
Donald E. Clark C on Sep 1, 2016
full color
Cheryl Z on Aug 27, 2016
I have a neighbor down the street who has these flowers by their mailbox. I'm hoping it's close to the same variety. The beauty these flowers radiate is jaw dropping.
Rachel R on Aug 27, 2016
others bought them looked great
Glen R on Aug 24, 2016
proliferation of buds and flowers
Alison P on Aug 22, 2016
Experiment to see how it will do in a Montana greenhouse.
William R on Aug 22, 2016
Very easy maintenance a lot of color.
Mark T on Aug 20, 2016
Love the smell and beauty of any Roses.
Rosalie A L on Aug 20, 2016
The abundance of flowers with minimum maintenance.
Rosemary W on Aug 20, 2016
NO,, Not Yet. Will answer next time.
David F. & Ms. P on Feb 23, 2017
Excited to add some color to my yard. Can't wait to see them!
Jasmine D on Feb 19, 2017
I have some knockout roses. Should they be pruned back in the Fall or should I wait until spring?
Sandy G on Oct 28, 2014
BEST ANSWER: Avoid pruning the Knockout roses at all in the first 2 to 3 years. Sterilize your sharp pruning shears with hot water or alcohol. This guarantees a cleaner, healthier cut. Always prune at an angle and not straight across. Activate the Knockout roses into growth and blooming by pruning it back a little in the spring after the last hard freeze. Keep the Knockout roses under control or if you want it smaller than it’s 3-feet wide by 4-inches tall size by pruning it back in the late summer or early fall. Remove dead or old canes at any time. Also cut very thin canes that might be coming up from the ground. Prune your mature plants by using the 1/3 rule each year in the spring. Remove 1/3 of the oldest canes and any stems that are damaged, diseased or dead.
how many double knockout roses do i need to plant to make a 12 foot long hedge?
gatornon on Feb 5, 2015
BEST ANSWER: If you want a solid hedge, you can plant them 3 feet apart, so that would take 4 plants. If you like to see the rounded top shape of each individual bush, plant them 4 feet apart, which would take 3 bushes. If you want a really dense, tight hedge, plant them 2 1/2 feet apart, which would require 5 plants.
What is the best time of year to plant them?
A shopper on Aug 31, 2014
BEST ANSWER: I prefer to plant them in the fall when they go dormant (If you live in a cold climate). I have also planted during the spring with great success.
How tall & wide do these knockout roses get ?
Vernon K on May 30, 2014
BEST ANSWER: My DKOR is planted in a planter box and I keep it trimmed. It is about 3'-4' wide and 4' height. It is absolutely beautiful always full of lovely fragrant roses.
I am looking for a red rose plant for a bed that grows to 1-2 feet in height and spreads. I am in zone 7 and would like something that blooms from may thru september. What do you recommend?
Steve on May 11, 2015
I planted the Double Knock Out Rose 1 week ago and have noticed the leaves are turning brown and are shriveling up. Also the middle of the roses are turning brown. Is this to be expected? This is the first time I have planted a rose bush in my yard.
Joan R on Jun 6, 2014
BEST ANSWER: I ordered 16 double knock out bushes over a year ago and now have a beautiful hedge in my front yard. I cut about 3 dozen roses each week and the blooms last! I did have some leaf spot early on and sprayed them with a mix of milk and water which seemed to do the trick. They are so beautiful that one night someone took 2 bushes right out of the ground! I tried replacing with double knock outs from Kmart and noticed that those bushes are not thriving like the others. I will replace then from Fast Growing Trees. Enjoy!!
will this rose climb a trellis?
Duane K on Apr 24, 2015
BEST ANSWER: This is not a climbing rose so it cannot be trained to do so.
Will double knock out roses do well in partial sun?
A shopper on Jul 6, 2014
BEST ANSWER: Yes. I have 5 double knock out rose bushes. I placed them in a location with morning sun and afternoon shade. They seem to be doing fine. They survived the rough NJ winter just fine.
There were no instructions on what to do with the Fert-Pact I bought 2 sets of 3 with the 2 double Knockout Rouse bushes. Do I bury the 3 of them at time of planting. Or do I bury 1 at a time so many months apart?
Diana F on Jul 27, 2014
BEST ANSWER: Bury them about a foot beneath the soil and foot away from the base of the plant in equal distances apart from each other.
Are these shrubs deer resistant?
A shopper on Jun 6, 2014
BEST ANSWER: I do not know, we do not have deer in our neighborhood. No problem with other critters like squirrels, raccoons and foxes. My guess that if deer bother other roses, they are likely to bother these.....but the thorns on roses may be their protection.
Do they have thorns?
A shopper on Jul 19, 2014
BEST ANSWER: Yes, but not as large, numerous or as sharp as many roses, particularly some of the older heirloom varieties. These are almost carefree roses. They bloom from spring to fall. A great choice that will enhance most landscapes.
"Instead of complaining that the rosebush is full of thorns, be happy the thorn bush has roses” (German proverb)
how much cold can they withstand in a flower pot?
celia b on Jun 16, 2014
BEST ANSWER: Double Knock Out Roses are cold hardy to about 23 degrees. This goes for being planted in the ground or in a pot. They're recommended for zones 5 - 10.
are they fragrant?
A shopper on Jun 5, 2014
BEST ANSWER: The Red Knock Out's are not, however, the Sunny Knock Out Roses are.
Can I plant my knock out roses now (November) They are in the pots in which I purchased them. The ground has not froze yet . And I would be planting them on the west side of the house near the foundation.?
Velda C on Nov 12, 2014
BEST ANSWER: Yes, fall is great time to plant them.
How to on plant & fertilize ?...
Eleanor M on Jun 4, 2016
BEST ANSWER: Planting instructions: You should start by digging a hole twice as wide and twice as deep as the root ball. Mix the manure or compost with the soil you have removed. Back fill the soil until you have a hole the same size or slightly larger than the container the rose is in. Plant the rose at the same depth as it is in the container. Space Knockout roses plants three feet apart.

Watering: Keep Knockout roses moist at all times. Water around the roots rather than overhead.

Fertilization: Fertilize with an organic rose fertilizer once a month. Use organic fertilizer rather than synthetic fertilizers. Synthetic fertilizers can promote weak growth, and your rose will have more foliage and less flowers.

Pests and Disease: Knockout roses are resistant to rust, black spot and powdery mildew.

Pruning: Avoid pruning the Knockout roses at all in the first 2 to 3 years. Sterilize your sharp pruning shears with hot water or alcohol. This guarantees a cleaner, healthier cut. Always prune at an angle and not straight across. Activate the Knockout roses into growth and blooming by pruning it back a little in the spring after the last hard freeze. Keep the Knockout roses under control or if you want it smaller than it’s 3-feet wide by 4-inches tall size by pruning it back in the late summer or early fall. Remove dead or old canes at any time. Also cut very thin canes that might be coming up from the ground. Prune your mature plants by using the 1/3 rule each year in the spring. Remove 1/3 of the oldest canes and any stems that are damaged, diseased or dead.
I live in sunny florida. I don't have shade. Can I still grow knockouts?
Georgia W on Feb 22, 2016
BEST ANSWER: I would say that you will have no problem. The more sun the better just make sure they get some water in dry spells.
How do you ship these plants across state borders? I am in S.E. Pennsylvania.
A shopper on Jun 4, 2014
BEST ANSWER: We have the proper certification from various state agencies throughout the U.S. Different states have different requirements as to what can be shipping in and out.
Can i plant in July in NJ?
JESSE T on Jun 26, 2016
BEST ANSWER: Yes the key thing is to make sure it gets plenty of water.
Will these thrive in the shade? I'm in zone 7 and currently have knock out roses that were planted last spring and they won't bloom.
Jenny D on Feb 3, 2015
BEST ANSWER: I have some in partial shade and they grow like crazy but have very few blooms.
if you only want them to get to be 18 inches tall are they a good choice?
Jan F on Sep 23, 2014
BEST ANSWER: They grow about 3 to 4 feet tall but can easily be kept around 18" tall.
Can these roses be planted in Fort Worth Texas in August ?
A shopper on Aug 4, 2014
BEST ANSWER: Yes. Double Knockout Roses will do very well in your area, in August.
how many rose bushes are in the 2 gallon order?
A shopper on Jun 28, 2014
BEST ANSWER: One Rose Bush is included in the 2 gallon size, but it's an older, larger, fuller more mature Double Knockout Rose Bush.
Hi. When's best to plant these? And what's the difference between the 1 year and 2 Year plants?
Penny E on Jan 2, 2017
BEST ANSWER: Planting in fall/winter/early spring, while they are in their dormant stage helps them get their roots, established without having to give nutrients to the rest of the tree. Also, with extra care you can plant in the summer, by planting in the evening after the sun goes down, so it will not get leaf burn. Giving it extra water and putting a 3-4 inch of mulch (keeping a few inches away from the trunk) to help retain moisture during hot dry weather.
The difference in the 1 year and the 2 year plant is the age, the 2 year is a little bigger and more mature.
do i cut knock out roses down in fall/winter?
A shopper on Sep 4, 2014
BEST ANSWER: NEVER CUT ROSES BACK just to do that. Prune out dead wood and conservatively prune for shape and interior health. If you have a branch way out of proportion to the size and shape of your rose, take it back to the nearest branch junction. In the center of the plant if you have branches crossing, you will need to study the situation and remove horizontal crossing branches one at a time. You may not be able to do this all at once, but it will prevent mildew damage if the rose can get more ventilation in the center. Study the plant and see where each branch goes before deciding which one to cut. Always remove diseased growth and do not leave trimmings on the ground by your roses. I just love my Knockout Rose - a double red. It is two years old and really coming into its own. It does not need a lot of pruning. I caution that roses need space according to their ultimate size, and should not be planted too close together. All plants deserve the room to achieve their natural size and shape, and should not be pruned for size alone. Hope all this helps.
Temperture can go below 20 degrees. Will the knock outs take the cold?
Tony j on Mar 21, 2016
BEST ANSWER: Roses generally do fine wintering over. The Knockout is a pretty hearty rose, so I think you wouldn't have a problem with it. Of course, you'd cut it way back in the winter so it can store up energy for the growing season.
Difference between 1 gallon and 2 gallon?
Richard B on Jul 30, 2015
BEST ANSWER: The 2 gallon size is bigger than one gallon and has a larger root base. Hope this helps.
What season is best for planting?
Karen R on Sep 18, 2014
BEST ANSWER: I have 8 of the knockout rose bushes. I planted them all in early spring (after the last freeze) and all were blooming by the first of June. Usually planted by the middle of April to the first of May.
What do you mean by a one year & 2 yr plant?
Judeski on Sep 30, 2016
BEST ANSWER: It takes about1-2yrs before bushes bloom double knock out roses. I feed them rose plant good when they were 1st planted. They are doing great now and have been giving me double batches of roses each year since then. I do not do any fusing with them now except cut them. They are very hardy
We have a piece of land that we want to turn into a hedge of roses as a separation between 2 houses. To create a hedge for a 75 foot strip of land in the shortest amount of time, how many roses would I need and how far apart would I plant them?
Page S on Sep 14, 2015
Knock Out Roses are 3-4 ft. wide at maturity. Therefore, I would plant every 4 ft. to prevent overcrowding. Too crowded and you'll have insufficient air flow. For a 75 ft. run I'd plant 18-19. Now is a great time to get those started. Happy Gardening
when is the best time to plant knockout roses?
Dianna G on Sep 6, 2015
BEST ANSWER: Here in the Southeastern part of Georgia, we can plant them most anytime but a good rule of thumb is to plant after the last hard freeze. The best time to plant roses is early spring or late winter. Knock Out® roses need to be planted where they will receive at least six to eight hours of sun each day. It also helps to have a site with good air movement and well-drained soil that falls between pH 6.0 and pH 6.5.After planting, water them regularly until they get established.These roses are winter hardy to USDA Zone 5 and also have good heat and humidity tolerance that allows them to grow through Zone 9.
More information at this site: http://www.fast-growing-trees.com/Red_Double_Knockout_Roses.htm

Shipping Details

Most items ship the next business day unless otherwise noted

Shipping Alert:

Due to cold weather, we have suspended shipping to the areas that are shaded on the map below. Please view the diagram to determine if your area has been affected. This includes anyone in Growing Zones 2, 3 4, 5 or 6. If you are unsure of your growing zone, visit our Growing Zone Finder.

We will resume normal shipping in the Spring. Please see the table below for your approximate ship date.

Zone Map


Shipping Resumes

Zones 2,3 & 4

Week of May 15th

Zone 5

Week of May 1st

Zone 6

Week of April 17th

Zones 7-11

Ships Now!

Shipping Cost

Amount of Order


Less than $15











32% of order