You are in Growing Zone:


Checkout Shopping Cart: (0) Items
Fall Promo Banner
Free Shipping on orders $125+
  • D
  • Double Knock Out® Rose for Sale

    Double Knock Out® Rose for Sale


Double Knock Out® Rose

Rosa 'Radtko'


1. Size

  • Ships Tomorrow
  • 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

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

4.6 / 5.0
94 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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 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
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 58 questions Browse 58 questions and 150 answers
Why did you choose this? Store
I read the reviews and overall they were positive reviews.
Clara A on Apr 30, 2017
I chose the double knock out for its fast growth and full bushes. It has a lot positive reviews and I have contemplated ordering for 2 years. Chose to take the chance and add it to my garden beds.
Kelly P on Apr 28, 2017
I read the reviews and overall they were positive reviews.
Clara A on Apr 30, 2017
To put on front entrance of property at each side of the driveway
Kurt K on Apr 29, 2017
I chose the double knock out for its fast growth and full bushes. It has a lot positive reviews and I have contemplated ordering for 2 years. Chose to take the chance and add it to my garden beds.
Kelly P on Apr 28, 2017
liked it
William S on Apr 27, 2017
Love roses
Sara O on Apr 25, 2017
Shan L on Apr 24, 2017
Hope it lives and blooms.
Susan S on Apr 23, 2017
because they are easy to grow.
Gisela G on Apr 22, 2017
Beautiful mothers day gift
Amanda J on Apr 22, 2017
very pretty rose bush
JAMES W on Apr 21, 2017
richard s on Apr 21, 2017
I love these roses.Beautiful .I did't have a problem with these roses.
Cinthy H on Apr 20, 2017
I looked at the pictures and wondered if it fit his house. he lives on a farm and it would bring his family together due the lost of his wife. They probable been married to 70 years and took on planting flowers. This way his children can talk on where to plant the shrub. he is really lost without his wife.
wayneay R on Apr 19, 2017
pretty and full sun
lana g on Apr 19, 2017
Looking to add spring to fall color to my cutting garden.
Melissa W on Apr 16, 2017
It looks stunning and shinning red.
Cheng Z on Apr 13, 2017
My dads favorite.
Joyce S on Apr 10, 2017
Anne D on Apr 10, 2017
Recommended by a neighbor.
George J on Apr 9, 2017
I liked how it looked and the good reviews
Elizabeth l on Apr 8, 2017
Love roses
Carol A R on Apr 8, 2017
I want to dress up the front of my home where I had removed some trees.
Karen C on Apr 8, 2017
Very easy to grow and offers great color all season long to brighten our outdoor living space!
Thomas G on Apr 8, 2017
Because of low maintenance and need color.
Toni P on Apr 8, 2017
Rick M on Apr 8, 2017
it my wife's favorite flower
Young K on Apr 7, 2017
We wanted a beautiful adornment to our patio area. We have steps leading down and this Double Knock Out Rose will fill in a space so we don't see under the steps. Hardy, lovely, and densely populated with blooms this rose bush is fairly fast growing and low maintenance.
Ted E on Apr 7, 2017
This is my first purchase with Fast Growing Trees. I have read great reviews about the health of their trees, plants, and shrubs. I want a pop of color in front and around my home, however I do not have personal experience with taking care of plants. Therefore I am relying on the reputation of Fast Growing Trees to have healthy, sturdy, and long lasting products. I can't wait to surprise our lawn crew. I can't wait to see these gorgeous beauties adding to our curb appeal!
Diana B on Apr 7, 2017
I needed to make the free shipping minimum....
B E on Apr 6, 2017
Beautify my garden when I look out window.
Derek D on Apr 4, 2017
the fact that the blooms last so long and so pretty
IRMA G on Mar 31, 2017
Breathtaking and add to my patio
BRYAN L B on Mar 30, 2017
We choose these for their beauty and lower maintenance.
Genvieve C on Mar 30, 2017
Bob B on Mar 29, 2017
I love them
Kay W on Mar 28, 2017
Partial shade type of rose bush and tolerant of cold and drought
Debra R on Mar 28, 2017
We choose this rose because it will be planted on the north side of our house which doesn't get a lot of sun.
Cathy S on Mar 26, 2017
Boyfriend loves roses!
Jacqueline M on Mar 25, 2017
these things just thrive anywhere.......acidic soil, non-acidic, shade, partial sun, full sun.....they are hardy. cant freeze them out either. about the only thing i noticed was that they really dont like to be transplated
Troy O on Mar 25, 2017
There was nowhere to submit the free shipping code!!!!!!!!!!!!!
Kim S on Mar 24, 2017
I order some last year and I was very impressed with the quality of the stock.
Thomas M on Mar 22, 2017
On sale
Carl K on Mar 22, 2017
Love the color and shape. Ideal for the edges of the house. Wish it came in other colors for my zone.
Mercedes P on Mar 21, 2017
A business in town has them as a border and they are blooming all summer into the fall. Absolutely breathtaking. I trust mine will look as beautiful.
Flora C on Mar 14, 2017
I've purchased these in the box stores, and I wanted one more for my landscape. I decided to try a nursery plant to see if there is a difference in quality of plant. In addition, they make a beautiful landscape addition.
Steve P on Mar 14, 2017
I bought the knock out rose because it looks nice and I hope it will improve the look of the yard
donald p on Mar 13, 2017
Planted two already and wanted another.
JOHN D on Mar 12, 2017
I heard these would look great
John H on Mar 11, 2017
give a pop to my mountain home
Anita L on Mar 11, 2017
in front of a stone wall
Stephen D on Mar 8, 2017
To put on front entrance of property at each side of the driveway
Kurt K on Apr 29, 2017
liked it
William S on Apr 27, 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: The knockout rose can stress a little after replanting, they should bounce back within a couple weeks. Make sure that you water well.
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.
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 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.
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.
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.
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: Yes, I think they are Pet friendly, I have two Jack Russell's and they are fine with them. These Knockout roses do have thorns, but not having to prune all of the time the thorns are not a problem.
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.
Are these roses draw a lot of bees?
Gregg M on Apr 17, 2017
BEST ANSWER: As a bee keeper myself, most honey bees have a hard time with most roses. I have not seen my bees on my roses. I have so many more other flowers they like better. Hope this answers your question.
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.

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 3 & 4. 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 3 & 4

Week of May 15th

Zones 5-11

Ships Now!

Shipping Cost

Amount of Order


Less than $15











32% of order