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Want to find the perfect plant for your landscape, or identify a mystery plant? Hartman Garden Center has an online Plant Finder to help you with your task. Remember, the best solution is always to talk to our plant and landscaping experts. Don’t hesitate to give us a call at (952) 443-2990.

    shrub

    Double Knock Out® Rose

    Rosa 'Radtko'

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    Double Knock Out® Rose (Rosa 'Radtko') at Hartman Companies

    Double Knock Out® Rose flowers

    Double Knock Out® Rose flowers

    (Photo courtesy of NetPS Plant Finder)

    Double Knock Out® Rose (Rosa 'Radtko') at Hartman Companies

    Double Knock Out® Rose in bloom

    Double Knock Out® Rose in bloom

    (Photo courtesy of NetPS Plant Finder)

    Height:  3 feet

    Spread:  3 feet

    Sunlight:  full sun 

    Hardiness Zone:  4

    Other Names:  Knockout Rose

    Group/Class:  Shrub Rose

    Brand:  Knock Out

    Description:

    This carefree landscape rose has all of the great features of Knock Out plus the added bonus of fuller blooms with twice as many petals; cherry red blossoms and deep purple fall foliage provides your garden three seasons of interest

    Ornamental Features

    Double Knock Out® Rose is smothered in stunning lightly-scented cherry red flowers at the ends of the branches from late spring to early fall, which emerge from distinctive ruby-red flower buds. The flowers are excellent for cutting. It has attractive dark green foliage which emerges burgundy in spring. The glossy oval compound leaves are highly ornamental and turn an outstanding deep purple in the fall. The fruit is not ornamentally significant.

    Landscape Attributes

    Double Knock Out® Rose is a multi-stemmed deciduous shrub with a more or less rounded form. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

    This shrub will require occasional maintenance and upkeep, and is best pruned in late winter once the threat of extreme cold has passed. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

    • Spiny

    Double Knock Out® Rose is recommended for the following landscape applications;

    • Mass Planting
    • Hedges/Screening
    • General Garden Use

    Planting & Growing

    Double Knock Out® Rose will grow to be about 3 feet tall at maturity, with a spread of 3 feet. It tends to fill out right to the ground and therefore doesn't necessarily require facer plants in front. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 20 years.

    This shrub should only be grown in full sunlight. It does best in average to evenly moist conditions, but will not tolerate standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This particular variety is an interspecific hybrid.

     
     
    Hardiness Zone Plant Height Minimum Sunlight
    Characteristics
    Massing  Screening  Garden 
    Applications
    Flowers  Foliage Color  Fall Color  Bark 
    Ornamental Features
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