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Double Knock Out® RoseRosa 'Radtko'

274 reviews
  • Double Knock Out® Rose

    Knockout Roses make low maintenance hedges of bright color.

  • Double Knock Out® Rose

    Knockout Roses have been cultivated for maximum disease resistance.

  • Double Knock Out® Rose

    Blooms have multiple petals with a reddish-pink bloom.

  • Double Knock Out® Rose
  • Double Knock Out® Rose

    Foliage in a dark greenish purple, with burgundy new growth.

* Images shown are of mature plants

Double Knock Out® RoseRosa 'Radtko'

274 reviews
Shrubs & Hedges

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.

  • This cultivar is more resistant to black spot, rust, and mildew than any other variety.
  • It's also resistant to pests, making harsh sprays unnecessary.
  • This improved variety will even grow in the shade, giving you more areas to plant.
$39.95
$39.95
Available Sizes:
  • 1 Gallon
    $39.95
  • 3 Gallon
    $79.95
    11% Off
  • 4-Pack (1 Gallon)
    $129.95
    18% Off
  • 6-Pack (3 Gallon)
    $349.95
    35% Off
Quantity:
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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. 

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.

Elevate the elegance of your garden with the effortless Double Knock Outs!

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

Planting & Care

1. Planting: Choose a well-drained site in full to partial sun (4 to 8 hours of sunlight per day). If you choose partial sun, make sure your plant receives at least 6 hours of direct sunlight each day (afternoon shade is better than morning shade).

Start by digging a hole twice as wide and twice as deep as the root ball. Backfill 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 Knock Out Roses 3 feet apart. Mulch the planting site to retain soil moisture and keep competing growth from coming up around the rose bush.

2. Watering: Keep Knock Out Roses moist at all times. Water around the roots rather than overhead (or showering). Generally, this means watering about once or twice weekly, or more often in dry conditions.

3. Fertilizing: Fertilize with an organic rose fertilizer once a month.

4. Pruning: Prune every spring, all the way back to 12 inches off the ground, after it is established. When you do prune, sterilize your sharp pruning shears with hot water or rubbing alcohol. This guarantees a cleaner, healthier cut. Always prune at an angle and not straight across.

Shipping Details

Estimated Shipping Time: Most orders ship immediately. 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 with a tracking number.

Amount of Order Shipping Charge
Less than $129 $19.95
$129 + FREE SHIPPING!

Product Details

Mature Height: 3-4 ft.
Mature Width: 3-4 ft.
Sunlight: Full-Partial
Growth Rate: Moderate
Botanical Name: Rosa 'Radtko'
Does Not Ship To: AZ
Grows Well In Zones: 5-10 outdoors
Your Growing Zone: #
5-10 outdoors       Map

Growing Zones: 5-10 outdoors

(hardy down to -10℉)

Customer Reviews & Photos

Customer Reviews
4.6 Based on 274 Reviews
5 ★
76% 
209
4 ★
12% 
33
3 ★
7% 
19
2 ★
2% 
6
1 ★
3% 
7
Customer Photos
99reviewers would recommend this product Write a Review Ask a Question

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PC
10/04/2022
Patricia C.
United States United States
I recommend this product

Double Knock Out Roses

The Double Knock Out Roses are doing very well and are healthy.

JH
09/28/2022
Jason H.
United States United States
I recommend this product

Excellent customer service

We ordered several flowers and the first shipment came damaged. Within a week we had replacements at our door. Beautiful flowers too!

AA
08/06/2022
Andrew A.
United States United States

Excellent plant

Excellent. Very happy with all four rose bushes. New growth and buds immediately.

RB
07/26/2022
Roger B.
United States United States
I recommend this product

This was a 2nd purchase of Double Knock Out For Me

My 1st was 2-3 years ago. It now looks like the sample photo above. I bought 3 more this time. Single Knock Out reds (I have several becase they were cheaper at the time) don't grow as bushy, tall or profligately floral as the Doubles.

TW
07/22/2022
Tammy W.
United States United States
I recommend this product

Best company ever

Best company ever I left his company because they back their product their products are great there on time customer service is so friendly