Double Knock Out® Rose Shrub

Rosa 'Radtko'

One of the most popular rose varieties, blooming consistently summer through fall

More resistant to pests, black spot, rust, and mildew than any other variety

Improved variety will even grow in the shade, giving you more areas to plant



  • FREE Shipping on orders over $99
  • In stock

Select size

Select quantity

Limited time only–up to 30% off your order!

Get up to 30% OFF on your order

Discount levelCart total
20% OFF
$200–$399
25% OFF
$400–$599
30% OFF
$600 or more
Sale ends 6/8 at 11:59PM

Pay in 4 interest-free installments for orders over $50.00 Shop Pay logo

Questions? Call our plant experts: (800) 973-8959

Double the Petals on Double the Roses

Why Double Knock Out® Roses?

Boasting one of the longest blooming periods available, from early summer to late fall, the Double Knock Out® Rose gives you all the amazing characteristics of the original Knock Out® Rose - just with more petals and even better disease resistance.

Even better? Not only is this cultivar more resistant to black spot, rust, and mildew, but it's also more resistant to insects. That means the Double Knock Out® is virtually maintenance-free, especially since it grows thickly without pruning. Plus, it thrives in containers or in the ground. 

About Knock Out® Roses: First introduced in 2000, the “Knock Out” family of roses has revolutionized the rose industry and remains the most prolific flowering shrub ever introduced. Each of the varieties in the brand are disease resistant, require minimal maintenance, and produce continuous blooms that last from spring to fall.

Why Fast-Growing-Trees.com is Better

With plenty of blooms to spare, you'll enjoy fresh cut roses in your home from spring until fall. And depending on your soil conditions, your blooms can range from dark to light red, offering even more versatility. And we prune your Knock Out® Roses before we ship them to give you an explosion of growth. Because of our hard work at the nursery and tried-and-true shipping process, you get a greater chance of success at home.

Looking for more roses to add to your collection? Check out our guide to popular types of roses.

Full Planting & Care Instructions

Product Details

Mature Height:3-4 ft.
Mature Width:3-4 ft.
Sunlight:Full Sun, Partial Shade
Bloom Season(s):Spring Blooming, Summer Blooming, Fall Blooming
Growth Rate:Moderate Growing
Botanical Name:Rosa 'Radtko'
Does Not Ship To:AK, AZ, HI
Grows Well In Zones:5-10 outdoors
grow zone map

Growing Zones: 5-10 outdoors

(hardy down to -10℉)

Customer Reviews & Photos

4.7

Based on 559 reviews

5461
451
329
28
110
Melissa R.
6/8/2026
Verified Buyer

Rose

It came in a damaged box (not your fault it was carrier!) and had some damage but I stuck it in the ground and they are blooming and growing like crazy. Beautiful!

Fast Growing Trees Plant ExpertHi Melissa, we're sorry about the damaged box and will definitely be sharing that with the carrier! So glad you got it in the ground quickly and that it's already blooming and growing like crazy despite the rough journey. Double Knock Out Roses are incredibly resilient and yours is clearly proving that. We're always here if you need anything!
Was this review helpful?
patricia b.
6/8/2026
Verified Buyer

FTG

FGT offers a wide variety of plants, trees schrubs, etc & stand behind their product. I will continue to purchase from FGT to continue my landscaping projects. I highly recommend FGT for your landscape needs.

Fast Growing Trees Plant ExpertHi Patricia, what a wonderful endorsement! So glad we've been able to support your landscaping journey and we'd love to keep being part of it. Double Knock Out Roses are such a beautiful choice and we can't wait to see what you add next!
Was this review helpful?
Nelson R.
6/8/2026
Verified Buyer

Beautiful plant

Plant arrived in great condition with a few buds that are already opening.

Was this review helpful?
Brenda L.
6/4/2026
Verified Buyer

Knock-out Roses

I ordered these plants twice (8 plants total). Both orders arrived very well packed. The first order I was worried about. FedEx stood the box upright by my mailbox even though the box says to lay the box flat. I was not home when the plants arrived and the box stood upright for a couple of hours. Two of the plants lost most of their soil and had a few broken branches. I planted them as soon as I got home and after a few days they looked okay. The second order arrived and was delivered to my carport and was laying down per box delivery instructions. Those plants looked great and so far they are doing great! So far, six of the eight plants are already flowering and the two plants that had a rough delivery are producing new growth! Highly recommend Fast Growing Trees!

Fast Growing Trees Plant ExpertWe absolutely love this update, Brenda! We're sorry about the first delivery with the box standing upright and will share that with our carrier right away. We're so glad your quick response saved those two plants and that all eight are now either flowering or producing new growth. Six already flowering is incredible! Your loyalty across two orders and your recommendation mean everything to us. We're always here if you need any help.
Was this review helpful?
Rakhi P.
5/31/2026
Verified Buyer

Great

Love those

Was this review helpful?

Over 2.7 million happy customers

TAKES LESS THAN 1 MINUTE

Hey—quick question!

We want to get to know you better. Answer 3 quick questions about how you buy plants!

87,000+ 5-star reviews

Personalized yard support

Get Plant Expert advice for your landscape. Schedule your consultation today!

Book Video Chat

Call (800) 973-8959

Your dream yard, without the hassle

Skip the tripOrder your plants and trees online
Extensive selectionAll the plants your yard needs
Enduring qualityGrown with care, guaranteed to thrive
Support and expertiseAdvice to get and keep you growing
23,602,550+Plants and trees delivered