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



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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 571 reviews

5472
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Jerry J.
6/23/2026
Verified Buyer

I have one rose

I am anxious to get some beautiful roses.

Fast Growing Trees Plant ExpertWelcome to the wonderful world of Knock Out Roses! It is completely normal to feel anxious for those first flowers, especially during the first few weeks after planting. Right now, your rose shrub is focusing on root development. To help it transition perfectly, make sure it receives at least six hours of direct sunlight daily and keep the soil consistently moist but well-drained. Before you know it, you will have a vibrant flush of stunning double blooms. Thank you for choosing us for your garden, and happy growing!
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Thomas Y.
6/20/2026
Verified Buyer

Very good deal for the

Very good deal for the money.

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Pamela K.
6/19/2026

Double knock out roses

Received my order of 9 double knock out roses today. Carefully packaged, fresh loose dirt around each plant. Each plant tie strapped inside a plastic bag inside the shipping plastic container. Secured in the cardboard shipping box so the plants could not move around. Very pleased with this purchase. After I unboxed the roses mother nature sent rain to freshen each plant. Can't ask for more than that. I look forward to next February when it will be time to trim the rose bushes back.

Fast Growing Trees Plant ExpertHi Pamela, what a wonderful unboxing experience and then rain right after, that's perfect timing! Double Knock Out Roses are such tough beautiful plants and 9 of them are going to be a stunning sight. Can't wait to hear how they look come spring!
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ROBERT P.
6/18/2026
Verified Buyer

The two red roses seem

The two red roses seem to be doing well - no problems so far.

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Alice P.
6/18/2026
Verified Buyer

So Far So Go

I wasn't that impressed when we received the plants. They were very small and looked close to dead. My husband planted them anywayand they are dong great. One of the plants died and after contacting the company they replaced it.

Fast Growing Trees Plant ExpertThank you, Alice! We're happy to hear your Double Knock Out® Rose Shrubs have exceeded your expectations after getting established. While we're sorry one plant didn't survive, we're pleased we could provide a replacement and help keep your garden growing. Wishing you many seasons of vibrant blooms and enjoyment!
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