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  • Double Knock Out® Rose for Sale

    Double Knock Out® Rose for Sale

*images shown are of mature plants

Double Knock Out® Rose

Rosa 'Radtko'


1. Size

  • Ships Tomorrow
  • Shipped in 1 gallon pot (6"-10" tall)

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
Add A Decorative Pot

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:


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

4.5 / 5.0
150 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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 6 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
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
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 6 years ago
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
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 3 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. Planting & Care

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 67 questions Browse 67 questions and 166 answers
Why did you choose this?
Fast-Growing-Trees.com Store
I should have got free shipping?
milanpaulic m on Aug 16, 2017
Lavonia B on Aug 2, 2017
I should have got free shipping?
milanpaulic m on Aug 16, 2017
Great price
Anton K on Aug 11, 2017
Lavonia B on Aug 2, 2017
Needed something to fill my very sunny front garden! I love roses and this had great reviews.
Marry A on Aug 2, 2017
Easy to care for
ron e on Jul 29, 2017
Have 3 in my yard and they started blooming within days after I got them in the ground and kept on booming through the summer, what more can you ask from a first year rose.
Lynette Smith-Payne S on Jul 27, 2017
I have had the double knock out variety of roses before and they have alwasy had blooms by the dozen and smelled wonderfull
Shane w on Jul 27, 2017
We grew knockout roses before and loved them! They grow fast, are beautiful, smell wonderful all season long, and are easy care and heat tolerant. We moved and just had to have these in our yard again!
Kristie W on Jul 27, 2017
one of my favorite flowers
Catherine P on Jul 26, 2017
My friend in the same town has them and they do beautifully.I hope to have the same outcome.
Deborah R on Jul 25, 2017
I like the idea that these roses purport to bloom so long and is hassle free. I chose the azalea because I want to see if I can grow it.
Clyde D on Jul 21, 2017
Color and ease of care
Teresa M on Jul 20, 2017
saw ad online and very beautiful flowers
Grace W on Jul 14, 2017
I have a hedge of knock out roses but their blooms are scarce compared to this bush. Would like to see if it really produces like the picture and will perhaps replace my hedge with these.
Sheree P on Jul 13, 2017
They bloom all summer and are very easy to take core of.
Harold S on Jul 6, 2017
Great roses!
Victor L on Jul 3, 2017
Had this plant in my garden in Georgia, a nd this was a beauty to behold. Just moved to another State. Must plant this beauty in my new garden.
Delzeta F on Jul 2, 2017
It will grow in my zone.
Jane T on Jul 2, 2017
For a friend
Lynne R on Jun 27, 2017
Looks beautiful in the picture and will look even more beautiful on my patio
Joshua B on Jun 24, 2017
It is a gift
Julia R on Jun 22, 2017
I like the long blooming season and the great reviews from other customers !!!
RANDY C on Jun 21, 2017
Red Roses are my favorite, and I'm excited to see them produce! My daughter planted one and it has absolutely thrived.
Daniel C on Jun 20, 2017
Easy to maintain
Pamela M on Jun 19, 2017
have one already - brilliant bloomer - want to make a mass of color on terrace
Sheena W on Jun 17, 2017
no thorns and love the colors for my deeck
shirley t on Jun 16, 2017
I wanted a rose bush I could grow in a pot that had beautiful flowers and I could plant it on the other side of my pergola.
Karen S on Jun 16, 2017
We have wanted to get some roses for our front yard and these will fit in nicely. Need some color now that the spring has come and gone. Want to liven up the front yard and can't wait to see the red blooms that last until fall! Can't wait!
Glenn R on Jun 11, 2017
I like the roses and I will use like a fence for my patio.
Adelita L on Jun 10, 2017
Can tolerate partial shade
Janet B on Jun 9, 2017
Roses have a classic, elegant look.
Eric S on Jun 8, 2017
It grows very fast and blooms in CA.
Hanzhu G on Jun 7, 2017
beautiful and hardy!
James H on Jun 7, 2017
Wanted variation of color in Rose Garden
Danny P on Jun 6, 2017
I've got a chain link fence around my back yard. I've been looking for something to hide the fence for a while. Everything I liked kept coming back to this site.
Michael E on Jun 4, 2017
One of the few that grows well in my area.
John C on Jun 3, 2017
Wife Wanted a pink rose bush
Robert H on Jun 1, 2017
Love its so prettiest
Betty m on Jun 1, 2017
I have some and I love them
Vivian J on May 31, 2017
Wanted add color with fast growing, easy to care for plants.
Mary T on May 30, 2017
They are really beautiful..tons of roses!
ROSEMARY L on May 30, 2017
With the help of the knowledgeable staff, in particularly Vicky-product specialist, I believe i have made a good and suitable choice of bushes for my climate.
ralph t on May 30, 2017
Never had them, looks beautiful, and I want to try them.
Renee W on May 30, 2017
Looks beautiful, had good reviews and I'm able to plant this in a container which is essential to me as I will be growing it on my balcony.
Rebeca d on May 29, 2017
Color all summer
Y U on May 28, 2017
My friend has these beauties growing along the front of his house and they are GORGEOUS! Gotta get me some of that!
Miriam K on May 26, 2017
Almost Neon RED when flowers first bloom ,Very attractive
Lester H on May 26, 2017
love roses
Dan L on May 25, 2017
I enjoy the continual blossoms of the Knock out rose.
Leigh Ann H on May 25, 2017
This has incredibly long blooming time and is just a beautiful plant. Want to buy more!!
Terri G on May 25, 2017
Great price
Anton K on Aug 11, 2017
Needed something to fill my very sunny front garden! I love roses and this had great reviews.
Marry A on Aug 2, 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
BEST ANSWER: Drift roses
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: The knockout rose can stress a little after replanting, they should bounce back within a couple weeks. Make sure that you water well.
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.
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.
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.
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)
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.
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.
VINNIE on May 9, 2015
BEST ANSWER: I have had mione for a few years (Zone 7) and they come back stronger and healthier every year but the tend to get spindly if you don't prune them drastically in the fall.
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.
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.
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.
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.
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
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: Just remember a rose can grow several feet in the summer so if you are constantly pruning to keep a bush to 18" which wants to be 4' tall how many buds are going to have a chance to form?
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.
when planted in rows to create a boundary, what is planting distance between plants?
Jack H on Dec 11, 2014
BEST ANSWER: They should be planted about a foot apart and a foot away from structures.
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.
Can I plant them in summer months? Are they a hardy bush that will survive in Sweetgrass, Montana 59484, which I think is Zone 5, 6, or 7
Carmella C on Jul 5, 2017
Does this rose have thorns?
Jacqueline B on Apr 17, 2017
BEST ANSWER: The flower rose does not have thorns, however, the branches most definitely have thorns. I wear garden gloves when pruning.
Are knockout roses pet friendly and are they without thorns?
jenna on Mar 7, 2017
BEST ANSWER: I guess the answer would depend on if the dog tears up plants and bushes pr behaves itself. Is your dog plant friendly? Lol. One good stick is usually enough to warn off a smart dog. Thorns of course more have them than don't! But good things come in sharp packages!
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.

Shipping Details

Most items ship the next business day unless otherwise noted

Estimated Shipping Time: Most orders ship immediately, however some orders may ship in 1-2 business days (we do not ship on the weekends) from date of purchase. As noted on the website, some items are seasonal, and may only ship in spring or fall. Once your order is shipped, you'll receive an email from with a tracking number.

You may receive multiple shipments if you ordered more than one plant. This is to get your plants to you as soon as possible. However, shipping schedules can change due to unforeseen events, such as unpredictable weather. We appreciate your patience.

Shipping Cost

Amount of Order


Less than $15











32% of order