Red Double Knock Out® Rose Tree

Availability: Out of stock

Knock Out® Roses changed the game when they hit the gardening scene. They are known for pumping out tons of bright cherry red double Roses with very little maintenance. Now all of the great qualities of the Red Double Knock Out® Rose are available in a classically beautiful topiary tree form! Expertly grafted atop a 2-3 foot tall straight and sturdy trunk, these blooms are elevated to eye and nose level!

Your Red Double Knock Out® Rose Tree (Rosa 'Radtko') will explode with deep-red blooms for months on end, from early spring to first frost! And its double blooms are known for their repeat performance of wave after wave of bursting red blooms from late spring until the first frost! You will often have Roses for a full 9 months!

This Tree Rose is more exciting than any photos online can depict! When it blooms, it comes alive with more red than green, but you'll still appreciate the gorgeous green foliage for setting off those brilliant blooms. You can pick them for a whole bridal party and the table centerpieces and still have plenty left to enjoy on the plant. The few times you'll see these not in bloom, you'll still enjoy the glossy green leaves as garden backdrops and lush filler!

These trees are highly sought after by landscape designers. They give you all the great color and low maintenance of the Knock Out® Rose bush but in a space-saving and eye-catching tree form! Hardy throughout USDA growing zones 5 through 11, these modern wonders of genetics and breeding tolerate an insanely wide range of growing conditions!

Planting and Application:

So easy to grow, Red Double Knock Out® can be planted anywhere sunny, but plant them, especially where you want attention! They are great as punctuation points in your landscape - near decks, patios and garden entrances. This kind of warm red looks great against brick foundations or in terra cotta pots but it really pops against cobalt blue!

Knock Out® Roses are one of the few Rose trees that thrive as a container plant. Use a pair in large urns to flank your doorway or stairs, or frame the entrance to a pathway to the backyard. Container gardeners and Balcony or Porch gardens of all sizes can accommodate this sultry bloom! Imagine this small, showy tree Rose as the "Thriller" in your seasonal containers. You won't be sacrificing precious space for this gorgeous Rose to take the stage!

Wonderful cut flowers, Red Double Knock Out® Tree Rose is so profuse, you will have a fresh bouquet every few days and won't even notice any are missing from the garden! Any garden becomes a cut flower garden and a pollinators garden with a few of these Rose trees and their shrub-form counterparts planted in their midst! You'll gain an impressive spectacle, loads of attention, and garden visitors - all while barely lifting a finger!

  • Mildly Fragrant Cherry-Red Double Rose
  • Long-Lasting, Bright Blooms
  • Up to 9 Months of Eye-Popping Color
  • Low-Maintenance & Easy Care
  • Great in Containers, Specimens & Focal Points
  • Grafted Atop a 2-3 Foot Tall Rose Standard
  • Non-Stop Cut Flowers & Colorful Orange-Red Rose Hips

#ProPlantTips for Care:

All Roses need sunshine, good air circulation and well-drained soil to thrive. Take time to choose the best planting site for long-term results. Be sure to include Nature Hills Root Booster in your order. You'll use it in the planting hole to provide life-long, symbiotic support for the tiny feeder roots. Water on a consistent schedule, and provide a high-quality Rose fertilizer according to the label directions. Mulch around your Rose tree, but please pull the mulch back away from touching the trunk.

Rose Tree Pruning

Early each spring, after the last frost has passed, it's always a good idea to prune back the Rose tree several inches to maintain the nice round form atop its trunk. Keep new blooms returning with occasional deadheading, quickly improving your overall display.

Prune away suckers and branching that forms at the base or on the trunk each year too. Pruning Roses allows for better, bushier growth each year. Read all you need about pruning Roses Here, and about winterizing Roses Here, and un-wintering Roses in spring in our #ProPlantTips Garden Blog.

  • Full Sun Lover
  • Moist Enriched Well-Drained Soil
  • Regular Fertility & Moderate Moisture Needs
  • Prune Early Spring & Deadhead For New Blooms
  • Appreciates Mulched Beds
  • Incredibly Disease-Resistant Modern Rose Genetics
  • Provide a Protected Winter Location

Get hot-colored red blooms all growing season without the fuss! The Red Double Knock Out® Rose Tree is a hot plant that's going fast, so get yours from Nature Hills while you still can! Order today!

Rose Bush FAQs

Where Is The Best Place To Plant Rose Bushes?

Rose Trees need a protected location and prefer full sun and favor the drying power of the morning sun and flower best in at least 6 hours of direct sunlight a day. Choose a location in good, enriched soil that drains well and has good air circulation.

What Is The Best Month to Plant Roses?

You can plant Roses any time if you are able to provide enough consistent moisture and attention. While there is not a specific month that is best, generally because it changes with temperatures, climate and growing zone. However, the easiest times of the year to get Rose bushes established in your landscape are in spring after the last frost date, and in fall about 4-6 weeks before the first frost.

Do Roses Come Back Every Year?

Rose bushes are deciduous woody perennial shrubs and will return bigger and better each year.

How Do I Find Rose Bushes & Trees for Sale Near Me?

Make your life easier and your yard happier by shopping for Roses at online nursery. You'll find a massive selection of Rose bushes for sale, including many lovely Tree-form varieties!

Choose the right shrub for your area by first finding your growing zone by entering your zip code in the field above the Plant Highlights section on our product pages. Narrow down your options by plant hardiness zone, sun availability, and size requirements.

Place your order, knowing it's backed by the Nature Hills Nursery product guarantee and protected by Plant Sentry™, which helps ensure regulated plant materials aren't sent to prohibited areas.

Expect to receive your plants at the appropriate planting time for your growing zone when temperatures are safest to ship through and into.

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 don'ts when it comes to shipping plants. Find your Roses 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 Tree Is Suited to Grow in Zones 5-11
Growing Zones 5-11
More Information
Brand Knock Out
Botanical Name Rosa 'Radtko'
Type Deciduous
Mature Height 5 - 6 feet
Mature Spread 3 - 4 feet
Sun Exposure Full Sun
Soil Well-Drained
Moisture Moderate
Growth Rate Medium
Foliage Color Green
Pollinator Friendly Yes
Fruiting Time Red-Orange Hips in Fall
Pruning Time Early Spring
Fragrant Yes
Photos courtesy of Star Roses and Plants -