• Double Knock Out® Rose for Sale

    Double Knock Out® Rose for Sale


Double Knock Out® Rose

Reg: $39.90
Save: $19.95  (50%)
Ships April 5th, 2016

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  • 2 Gallon
  • 1 Gallon

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- Starter Fertilizer
DIEHARD™ Transplant

2oz. Packet

Get your new plants off to the right start by using DIEHARD™ 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

DIEHARD Transplant

Growing Zones: 5-10

Growing Zones 5-10 This plant is recommended for zones: 5-10
(green area above)
You are in Growing Zone: 6

Mature Height:

3-4 ft.

Mature Width:

3-4 ft.


Full to Partial

Drought Tolerance:


Botanical Name:

Rosa 'Radtko'

Does Not Ship To:



- 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.

Customer Reviews

4.6 / 5.0
65 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!
December 31, 2012
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 2 years ago
The Double3 Knockout Rose is a great addition to my roses. It has produced a huge number of very bright red roses consistently.
December 31, 2012
Great! Blooms forever! Deer Wont Eat Them!
December 31, 2012
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!!
December 31, 2012
over 4 years ago
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
December 31, 2012
over 3 years ago
We got the roses on a timely basis. They were already blooming. They are growing good and look great. Good Service. Hubert
December 31, 2012
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.
December 31, 2012
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
1 year ago
Growing Zone:
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
December 31, 2012

Planting & Care

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

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 44 questions Browse 44 questions and 83 answers
Why did you choose this?
Fast-Growing-Trees.com Store
The name says it best...
Martin R on Feb 10, 2016
i have just ordered the roses and am hoping they will do well here
eeira m on Jan 28, 2016
The name says it best...
Martin R on Feb 10, 2016
These double Knockout Roses are amazing. I live in Zone 9 Florida the Sunshine State and those Roses blooms all year. They grow pretty fast also. I'm very impressed.
Loretta M on Jan 29, 2016
i have just ordered the roses and am hoping they will do well here
eeira m on Jan 28, 2016
blooms frequently and drought tolerant.
Reena R on Jan 4, 2016
Thomas E on Dec 26, 2015
Loved the look of the Knock Out rose. Someone made a comment on ANOTHER flower/tree website on how they loved the lady's mantle paired with it and also the Lady's Mantle (Alchemilla mollis) and Geranium 'Rozanne. They didn't have the Rose on their website so I viewed yours.
Kathy K on Nov 12, 2015
I am very happy with the double knockout roses in our garden. Easy to grow and maintain. Splendor of color. Wonderful.
Gabriele O on Nov 8, 2015
sheila d on Nov 1, 2015
free shipping
douglas m on Oct 20, 2015
We have had great success with double knock out roses in a past residence. They are so beautiful and last a long time. I am a bit nervous that since it is October, how well they will do planting now instead of waiting til Spring.
Eva J on Oct 13, 2015
The brilliant color and the size when fully grown
Catherine V on Oct 12, 2015
Great Plant
Robert M on Oct 10, 2015
I have a lot of them and love them.
otis S on Sep 18, 2015
I already have several of these and are pleased with the long bloom time, as well as being disease resistant. These are a lovely addition to most any landscape.
Emily S on Sep 2, 2015
Asked a question about a plant to grow as a barrier to keep teenagers from crushing smaller plants in the area
jeanne f on Sep 1, 2015
I have a red knockout rose that I like a lot and want to add another next to it.
Timothy G on Aug 27, 2015
These double Knockout Roses are amazing. I live in Zone 9 Florida the Sunshine State and those Roses blooms all year. They grow pretty fast also. I'm very impressed.
Loretta M on Jan 29, 2016
blooms frequently and drought tolerant.
Reena R on Jan 4, 2016
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: The best time to prune the Knock Outs is early spring just as buds begin to break dormancy, usually around the time the Forsythias bloom. For the Knock Outs, you should wait until the second season of growth to prune, How high you prune depends on how high you want your rose bush to finish. It usually triples in size after pruning, so if you cut it back to a foot, it will finish up at 3 feet during the growing season.
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
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
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.
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.
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/DoubleKnockoutRoses.htm?turntoqid=S0IHaE0eZA&turntosuid=S0ENbU0f&sourceId=1&turntoQuestionId=1232516&turntoRecipient=eyJlbWFpbCI6ImdsZW5kYWNhcmxpbkBjb21jYXN0Lm5ldCIsImZpcnN0TmFtZSI6IkdsZW5kYSIsImxhc3ROYW1lIjoiQ2FybGluIiwibmlja05hbWUiOm51bGx9&turntoTrackingToken=eyJpcXJsSWQiOjIzNTI0NTQ5LCJ0dXJudG9RdWVzdGlvbklkIjoiMTIzMjUxNiIsInR1cm50b0VtYWlsVHlwZSI6InF1ZXN0aW9uIn0%3D&turntoEmailType=question&iqrlId=23524549&turntosku=KNO-DRE&turntoflow=answer#turntodone
I live in central Virginia. Is the beginning of September too late to plant these?
Pamela P on Aug 29, 2015
BEST ANSWER: I think Southwestern Kansas is still great and I believe we would get cold sooner than you. Our altitude is
3100 feet to give you another way to compare the climate. Good luck.
will deer eat theses roses? i want them to.
jonathan b on Aug 19, 2015
BEST ANSWER: Hi Jonathan
Deer can be unpredictable. Because you want them to eat your roses, they won't. They will eat everything you don't want them to eat. I think it's the nature of the beast. Thank you
Can they be planted in July?
Margaret J on Jul 19, 2015
BEST ANSWER: Well, Fast Growing Trees tells me I bought some in July so I'm sure I planted them in July, in St. Marys. GA several years ago. They are doing splendidly. We have many 100 plus days here in July. I planted them in a 50/50 mix of Miracle Grow shrub and tree soil and Black Cow composted manure and kept them watered. No problem with heat. A pity I can't attach photos. Come this winter, they will be large enough to prune into a hedge.
best time to plant knock out roses?
andy l on May 17, 2015
BEST ANSWER: I planted my knock out rose tree in early spring. I put it in a pot and if I was afraid of cold nights (Michigan) I moved it to the garage.
It is doing well. I am worried about putting it into the ground and having it survive the winter.
I suppose I could dig it out, lay it on the ground, and cover it to protect it during the cold winter winds.

However I will probably leave it as a potted plant. It looks really good on the patio.
I will move it into the garage for the winter.

Hope this helps.
How do you deadhead knockout roses after the first bloom?
Myron on Jul 30, 2014
BEST ANSWER: Double Knockout Roses do not need to be dead headed. Simply removing old blooms is enough pruning. Another wave of blooms will quickly fill in. Cut below the flower stern with sharp clean pruners. If you see a cluster of flowers that are dull or wilting cut below he cluster. Cut farther down on the stem if you prefer slower growing more mature roses.
What size container should be used when roses first arrive and do they have to be replanted in a larger container as they mature? If so, what size container does a full-grown bush need?
Nancy R on Jun 6, 2014
BEST ANSWER: If the plant is healthy, I would just plant it in the ground. The one I received I planted immediately and it has grown 4 times its size since last spring. It blooms all spring and summer, it's beautiful.
Am in zone 7 is early fall a good time to plant?
David P on Sep 22, 2015
BEST ANSWER: Early fall is a great time to plant in your area. It does not take long for the roots to get established and ready for winter.

Shipping Details

Most items ship the next business day unless otherwise noted

Orders are occasionally delayed if we see really bad weather approaching, or if we encounter unusual circumstances. A small number of our plants show a specific release date. If you purchase one of these and would like your other items sooner, just let us know.

Shipping Cost

Amount of Order

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Will trees and shrubs look like the photographs?

Most trees and plants on the website are pictured in their mature form. Depending on the product and growth rate, mature development can take years for your plant to resemble the photos. Picture the last time you took a walk in the woods. The young trees were not miniature bonsai versions of mature trees. Instead they were naturally thin and lanky. Young trees are programmed to race toward the light, before the competing vegetation crowds them out. Once established at 10 feet or more, they start developing a wide canopy and shedding lower limbs.

Trimming & Pruning

Most Trees and Shrubs are Pruned Before Shipping... at No Cost to You!

Pruning makes plants appear to be less-full than the ones you may have seen at your local big box garden center. A retailer's goal is to have plants look their best while sitting in the store. Our goal is to have them look the best after you plant them.

Pruned trees and shrubs not only travel better, but become established much quicker. So rather than supporting extra foliage, they put their energy into sending out deep roots. Once that happens, your plants become hardier and quickly explode with new top growth. Above the ground, pruning helps your plants develop a more attractive form.