Red Double Knock Out Rose

(3 customer reviews)
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Site wide discount 2 - 5 5%
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About Red Double Knock Out Rose

The Red Double Knock Out Rose is a deciduous/semi-evergreen plant and will go dormant during the winter months. When this plant is ordered during the Fall/Winter expect seasonal foliage decline(discoloration, spots, leaf drop) or the plant to arrive completely dormant.

For an extra 10% off your order of deciduous plants use coupon code: DormantPlant2021

What to do when a dormant plant arrives:

  1. Unpackage on arrival and water
  2. Your plant will be ready to be planted in the landscape or in a container on arrival, or if you wish you can keep your new plant in its container until spring that is ok too
    • If planting in the landscape
      • Consider using a root stimulating fertilizer to get your plant working hard establishing its root system during the winter months
      • Use a heavy Layer of mulch to protect the unestablished roots from frost 
  3. Dormant plants do require some watering: once a week should be sufficient 
  4. When Spring arrives and your plant begins showing signs of new growth increase your watering schedule to 2 times every 7 to ten days until established, then water as needed. Apply a slow-release granular fertilizer to give your plant a great start

The Red Double Knock Out Rose has quickly become a favorite for gardeners all over the U.S. and beyond. From the same breed that created the original Knock Out Rose, the Double Knock Out packs twice the punch with twice the petals. Traditionally, each medium-sized bloom will range from 18-24 petals. From spring to fall, the Red Double Knock Out Rose produces velvety red double blooms that are deeply reminiscent of classic roses. These gorgeous blooms just keep on popping up for nearly the entire growing season, and they’re perfect for anyone looking for a truly reliable bloomer.  Additionally, purplish-green foliage creates an attractive display even without blooms. Furthermore, Knock Outs are self-cleaning, meaning that there’s no need to deadhead them, although you certainly can if you so desire.

Red Double Knock Out Rose Care

These landscape shrub roses are hardy from USDA Zones 5-11. Once established, Red Doubles are generally low maintenance but will require some seasonal pruning and watering in dry spells. These Knock Outs perform best when planted in full sun to part shade in well-drained garden soil. With a mature height of 3-4 feet H x 3-4 feet Wide, this rose won’t engulf your entire garden.

Gardeners that prefer a carefree rose experience will appreciate the Double Knock Out Rose. For example, they’re naturally resistant to black spot, and they feature impressive winter hardiness. Some gardeners even just trim them back and fertilize them in spring and don’t touch them again until next year. A quality organic or granular rose fertilizer will help them get off on the right foot in spring.

Try them out as a colorful hedge or foundation planting, they’ll keep your landscapes full of blooms almost all growing season long. Conversely, plant them in a garden bed with annuals and perennials as a specimen plant.

Spacing Your Red Double Knock Out Rose 

Space Your Red Double Knock Out Rose 3 feet apart for best results.

Click Here for Information on Winter Rose Dormancy

Click Here for Information on Pruning Knock Outs from Southern Living

Common Name
Red Double Knock Out Rose
Scientific Name
Rosa 'Radtko'
USDA Zones
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Average Size
Sun Exposure

3 reviews for Red Double Knock Out Rose

  1. Jessica Jackson (verified owner)

    I ordered 4 3 gallon knockout roses. They were shipped carefully and arrived in great condition. The leaves started turning yellow shortly after planting but I think it was from shipping shock. It’s been a few weeks now and they’re back to looking healthy and blooming like crazy. I’m very pleased.

  2. Debbie Sales (verified owner)

    Very healthy plants that arrived very quickly! No harm in transit and thriving!

  3. Dana McKinley (verified owner)

    Arrived in great shape and was well packaged. Each plant had blooms and looked very healthy. I could only get the smallest size as that’s all that was in stock. They are quite small but hopefully they stay healthy so they can grow and bloom again soon.

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