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Double Knock Out® Rose Rosa 'Radtko'

244 reviews
Shrubs & Hedges

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

* Images shown are of mature plants

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.
Regular price $109.95 Sale price
$119.80

Plant now, pay later on orders between $50 and $3000 with

Size:
  • 1 Year Plant
  • 4-Pack (1-Year) 8% Off
  • 2 Year Plant
  • 3 Year Plant
  • 4 Pack (3 Year) 17% Off
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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
You are in Growing Zone: #

    
    
    
      5-10 outdoors
    
   Map

Growing Zones: 5-10 outdoors

(hardy down to -10℉)

Product Description

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. This improved variety will even grow in the shade, giving you more areas to plant.

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!

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

Shipping Alert:

You can still order, but due to cold weather, we have delayed shipping to the areas shaded on the map below. We want your new plant to thrive right out of the box, so we will wait on shipping your order until the weather is ideal. This includes anyone in Growing Zones 3, 4, 5, & 6. If you are unsure of your growing zone, visit our Growing Zone Finder.

Some plants are not available for immediate shipment, and delayed delivery is noted.

We will resume normal shipping in the Spring. Please see the table below for your approximate ship date.

Zone Map
Growing Zone Shipping Resumes
Zones 3 & 4 Week of May 2nd
Zone 5 Week of April 11th
Zone 6 Week of March 28th
Zones 6 - 11 Ships Now!

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 $15 $11.95
$15.00-$23.99 $13.95
$24.00-$39.99 $16.95
$40.00-$78.99 $19.95
$79 + FREE SHIPPING!

Customer Reviews & Photos

Customer Reviews
4.5 Based on 244 Reviews
5 ★
75% 
182
4 ★
13% 
31
3 ★
7% 
18
2 ★
2% 
6
1 ★
3% 
7
Customer Photos
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DJ
11/21/2021
Deborah J.
United States United States
I recommend this product

Beautiful and tasty!

Arrived healthy and full of rose buds, despite being well into Fall. Enjoyed several beautiful blooms before the deer discovered them and ate them all! Still working on a way to see and enjoy them next season while keeping them safe from the deer.

Fast-Growing-Trees.com Double Knock Out® Rose Review
A
07/09/2021
Anonymous
United States United States
I recommend this product

the flowers looked wilted when I got them

The flowers fell off within a week of me planting it. the leaves are still green so hopefully it will be ok next year.

Fast-Growing-Trees.com Double Knock Out® Rose Review
A
06/03/2021
Anonymous
United States United States
I recommend this product

Great product

Beautiful roses

Fast-Growing-Trees.com Double Knock Out® Rose Review
KM
05/28/2021
Kathy M.
United States United States
I recommend this product

Gorgeous Roses

The Knockout rose bush is the best around! These Roses bloom year round and require very little maintenance! They grow fast and are covered in flowers! I love this plant!

Fast-Growing-Trees.com Double Knock Out® Rose ReviewFast-Growing-Trees.com Double Knock Out® Rose Review
CD
05/25/2021
Cassie D.
United States United States
I recommend this product

Very happy

I purchased 8 of the double knockout roses in early June of 2020. They arrived with some blooms and looked very healthy. Planted right away. With very little effort and a touch of fertilizer and rose food, they have grown very fast and are putting on a magnificent spring show just one year later. We have received tons of compliments. There are so many blooms that you don't notice if you want to cut and gift a vase of roses. Beautiful and low maintenance, my kind of plant! So happy with our purchase that we just ordered even more for our backyard this time.

Fast-Growing-Trees.com Double Knock Out® Rose ReviewFast-Growing-Trees.com Double Knock Out® Rose ReviewFast-Growing-Trees.com Double Knock Out® Rose ReviewFast-Growing-Trees.com Double Knock Out® Rose Review
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