Double Knock Out® Rose

4" Pot.
Item #10141
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About the Double Knock Out® Rose Plant

Enjoy twice the beauty! The Double Knock Out® Rose has an abundance of lightly fragrant, cherry red, medium-sized flowers that have twice as many petals as the original Knock Out® Rose. It has the classic rose shape and adds a striking accent to the landscape. Its leaves and stems are deep, purplish green.

The Double Knock Out® Rose, rosa ‘Radtko’, was developed by Will Radler in Milwaukee, Wisconsin, and released to the public in the early 2000’s. It is the winner of an Australian Gold Medal in 2004 and was declared a Master Rose for 2019 from the American Rose Trials for Sustainability.

Like the Knock Out® Rose, the Double Knock Out® Rose, is prized for its abundant and continuous flowers, blooming in cycles from late spring through first frost. It is also beloved for being virtually maintenance-free and very hardy. It is self-cleaning, meaning that it does not need to be dead-headed, and it has excellent resistance to black spot and downy mildew leaf diseases.

This plant can stand alone as a stunning focal point or be planted in succession to form a gorgeous hedge.

Using Roses

Roses are edible flowers. In order to eat them safely, however, make sure that they are chemical free. Rose petals are lovely to add to tea, lemonade, or juices. They are delicious to use in butter and salads. Steep rose petals to make rose water or dry them for use in potpourris. They contain some vitamin C.

Roses are beautiful cut flowers. Because the Double Knock Out® Roses are continuously blooming, you can enjoy bringing lots of gorgeous flowers indoors for home decorating.

Growing Double Knock Out® Roses

These plants are hardy, heat resistant, and drought resistant once established. Unpruned they grow into bushes that are between 3 to 4 feet tall and wide. If pruning is desired, be sure to prune in early spring before budding occurs.
All of the Knock Out® Rose family of plants need full sun for 6 to 8 hours per day. These rose bushes should be planted 3 feet apart on center to allow for adequate air circulation.

Double Knock Out® Roses may be planted in containers. Be sure to keep them well watered with full sun, and to transplant them into pots that are twice the size of the container it was first in to give it plenty of room to grow.

This plant may be covered by USPP #16,202 or other patents. This patented variety is sold under license from the patent owner.

Buy the stunning Double Knock Out® Rose to enjoy these abundant, gorgeous red flowers, that grow on hardy plants which are easy to maintain!

Survival Guaranteed!

Since 1816, Stark Bro’s has promised to provide customers with the very best fruit trees and plants. It’s just that simple. If your trees or plants do not survive, please let us know within one year of delivery. We will send you a free one-time replacement, with a nominal shipping fee of $9.99. If the item in question is not available, we can issue a one-time credit to your account equaling the original product purchase price or issue you a refund. Read more about our warranty policy.


Bloom Color Red
Shade/Sun Full Sun
Soil Composition Loamy
Soil Moisture Well Drained
Soil pH Level 5.5 - 7.0
Zone Range 5 - 9

Size & Spacing

Mature Size

When your plant matures, it will be approximately 3 - 4' tall x 3 - 4' wide.

Recommended Spacing

We recommend spacing these plants 3 - 4' apart to ensure room for growth.

Zone Compatibility

This Variety's Zone Range 5 - 9
My Hardiness Zone ?
The USDA hardiness zones offer a guide to varieties that will grow well in certain climates. Each zone corresponds to the minimum winter temperatures experienced in a given area. Make sure that your hardiness zone lies within the zone compatibility range of this variety before ordering.

Related Assortments

Available in these money-saving assortments

We bundle many of our popular products in assortments with other items that compliment each other. Plus, when you purchase an assortment, you save money compared to buying each item individually!

Tools & Supplies

Having the proper tools and supplies when growing your own can make the difference between a good harvest and a great harvest! Here's a list that our experts recommend for this variety.

Planting & Care

Learn all about how to grow roses in The Growing Guide. An entire section of our website dedicated to your growing success.

Shipping Information

Arrives when it's time to plant

Your success is our priority. We work hard to make sure that your order arrives at the ideal time for planting in your location based on your local climate conditions.


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