Red Double Knock Out® Rose

As low as $39.59 was $59.99
Availability: In stock

When it comes to high-performing, reliable Roses, the Knock Out® series takes the cake! The Red Double Knock Out® Rose (Rosa 'Radtko') is no different. This easy-to-maintain Rose bush ignites the yard with more blooms than you can count. And it's known for its repeat performance of wave after wave of bursting red blooms from late spring until the first frost!

The red flowering Double Knock Out® Rose Shrub is more exciting than any photos online can depict. When it blooms, it comes alive with more cherry red than green. Its double blooms offer a luxurious display on a low-maintenance plant. You can pick them for a whole anniversary party, fill table centerpieces and vases all season and still have plenty left to enjoy on the plant. Much to the pleasure of your pollinators that arrive to check out your blooms. The few times you'll see these not in bloom, you'll still enjoy the glossy green leaves!

Enjoy flowers until autumn, and once the frost hits, you can still enjoy the Knock Out® Rose's showy orange Rose Hips while looking forward to its attractive violet-hued fall foliage! Enjoy colorful winter décor and beautiful dried bouquets!

Double Knock Out® Rose isn't grafted. Instead, it grows on its own roots, which gives them added resiliency in cold winter zones. No matter what winter throws at you, this Rose will grow back in the spring, looking as great as ever. Give them full sun, well-drained soil and a medium amount of water, and let them shine for you!

Rest assured, these tough Shrub Roses are disease resistant. They can handle heat and drought once established. It even thrives in humid conditions. No fuss, no muss, but lots of flowers. Hardy throughout USDA growing zones 5 to 9, there is little these resistant and resilient plants can't handle in your yard! Knock Out® Roses have resistance to blackspot, powdery mildew, or leaf rust and also do very well in humid climates. What a wonderful plant!

Planting and Application:

The Red Double Knock Out® Rose stays compact, which makes it ideal for a wide variety of landscape uses such as foundation planting or informal hedges. It also makes a vibrant middle border or back border. Rely on their charming color and tidy, mounded form to welcome guests and boost the curb appeal of your property. Decorate your landscape with these easy-care Landscape Roses grown in the ground, or if you prefer, in containers for a dramatic profusion of color.

No property? No problem! Plant them in a pot, and use it to decorate your sun-drenched balcony, porch or patio. Just give yourself and your guests some "wiggle room" to move past it, as those thorns are no joke! Larger planters and year-round porch pots will add long-lasting blooms to your patio and even balconies! The butterflies will adore the blossoms and stop by for a visit.

Use in lower water-use gardens, as Firewise landscaping buffer zones, and watch as that hell strip lights up with color and charm! It will also make your hell strip light up with color and charm.

Add a single specimen to your cottage and perennial beds and borders, or accent your home's front steps, mailbox, or near driveways to welcome you home! Use a pair flanking on either side of your front door, or create interest with a triangular accent as anchor planting at the corner of your home.

Imagine several of them planted together for a big impact! These plants make excellent additions to foundation plantings. Plant them two feet apart on center to create low hedges that grow together. Or, use multiple rows planted in a staggered zigzagging pattern to fill a wide, open area. You'll appreciate how easy-care your new mass planting spectacle is when you fill large areas in profuse red blooms! Go for the gusto and mix and match with other Knock Out® Roses for a rainbow display! You will enjoy an instant style that makes everyone happy and you'll definitely appreciate the performance!

  • Red Double Blooms Spring Through Fall
  • Mildly Fragrant Cherry-Red Rose
  • Cheerful Color Won't Fade
  • Compact Shrub Rose & Growth Habit
  • Beautiful Dark Green Foliage
  • Easy Care & Maintenance Free Rose
  • Great Cut Flowers, Colorful Rose Hips & Fall Foliage Color

#ProPlantTips for Care:

The Red Double Knock Out® Rose is best known for its drought tolerance and high resistance to blackspot and downy mildew! Just be sure to plant them in an area with good air circulation. Provide a full sun location and plant in well-drained soil that’s organically enriched and mulched well. The more sun, the more flowers! Plant in well-drained soil doesn't stay wet for long after a rain. If you see puddles that remain, you'll want to create a raised planting bed. For truly soggy soil, plant them in containers or create a berm.

Be sure to include a packet of Nature Hills Root Booster when planting. You'll love the boost in performance when you get your Roses off to the best start. Follow the directions on the package. Apply 3 - 4 inches of arborist mulch to cover the root system. Apply a slow-release fertilizer for Roses in early spring and again in mid-summer, following the directions on the label.

Although they are often listed as drought tolerant, Nature Hills recommends that you provide Knock Out® Roses with a medium amount of water on a regular basis. You'll be so pleased with how quickly they perk right up. For best results, water these regularly, or add a drip irrigation system beneath the mulch to make it easier for you.

Knock Out® Roses self-cleaning, so there is no need to deadhead spent blooms. What could be easier? These plants will stay smaller in the colder USDA Growing Zones, but if you wish to give them a trim, pruning is best done in early spring if needed. Wear gloves to protect your hands. Read all you need about Rose pruning Here, and about winterizing Roses, and un-wintering Roses inspiring in our #ProPlantTips Garden Blog!

  • Full Sun
  • Moderate Moisture Needs Once Established
  • Well-Drained Enriched Soil
  • Heat Tolerant & Cold Hardy
  • Self-Cleaning Blooms - No Deadheading
  • Low Maintenance & Disease Resistant

The Red Double Knock Out® Rose Shrub is a fan favorite that has it all, so don't delay ordering. We expect this specimen of health and beauty will sell out quickly. Order enough for your next project today from!

Knock Out® Rose Bush Frequently Asked Questions

What is the difference between a Knockout Rose and a Double Knockout Rose?

The main difference between these two varieties of Shrub Rose is that the Double obviously has double the petal count compared to the more 'wild rose' look of the original Knock Out® Roses.

Is it OK to plant Double Knockout Roses?

The Double Knock Out Roses are fantastic flowering shrubs that feature ease of care, disease resistance, and fuss-free growth regardless of where you plant them in the country! Nature Hills uses Plant Sentry™ to ensure any plant material entering your area will be free and clear of any disease or pest issues that could potentially become an invasive issue.

What colors do Double Knock Out Roses come in?

Knock Out Roses come in a huge range of color options! From pink both light and dark, to reds, white, yellow and peachy apricots, you'll enjoy a vast array of hues to accent your gardens!

Do Double Knockout Roses come back every year?

Knock Out Roses are incredible Rose shrubs that come back year after year, only getting bigger and better! Cold and heat tolerant in USDA hardiness zones 5 through 10, these are reliable and adaptable shrubs!

What Shipping Options Do You Offer? works closely with our growers and nursery professionals to ensure we ship when it is most appropriate for your area. Our goal is to deliver the hardiest plants by avoiding extreme high and low temperatures. Check out our shipping schedule for more information and to learn our wills and won'ts when it comes to shipping plants, trees and shrubs. Find your Red Double Knock Out® Rose bushes for sale here at!

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container Ranges from 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

Click Here to learn more

Plant Sentry


To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.

*If you have found your zone already, it will be highlighted in the table below.
Color Zone Times
3 Spring 2019
4 Now
5 Now
6 Now
7 Now
8 Now
9 Now
10 Now
11 Now

Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 24.99
20 - 49.99 29.99
50 - 69.99 34.99
70 - 99.99 39.99
100 - 129.99 44.99
130 - 149.99 48.99
150 - 150+ Approx 28%

Click here to see our full rates


Red Double Knock Out® Rose Is Suited to Grow in Zones 5-10
Growing Zones 5-10
More Information
Brand Knock Out
Botanical Name Rosa 'Radtko'
Type Deciduous
Mature Height 3 - 4 feet
Mature Spread 3 - 4 feet
Sun Exposure Full Sun
Soil Well Drained
Moisture Moderate
Growth Rate Medium
Fall Color Burgundy / Purple
Pollinator Friendly Yes
Fruiting Time Orange Rose Hips in Fall
Pruning Time Early Spring
Fragrant Yes
Photos courtesy of Star Roses and Plants -