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Knock Out® Rose Tree

Rosa 'Radrazz'

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Knock Out® Rose Tree (Rosa 'Radrazz') at Platt Hill Nursery

Knock Out® Rose Tree in bloom

Knock Out® Rose Tree in bloom

(Photo courtesy of NetPS Plant Finder)

Height:  3 feet

Spread:  3 feet

Sunlight:  full sun 

Hardiness Zone:  4b

Other Names:  Knockout Rose

Group/Class:  Shrub Rose

Description:

One of the most popular rose tree in the world today, primarily due to its low maintenance, superior disease resistance and incredibly long period of bloom, with seemingly endless cherry red flowers; all roses need full sun and well-drained soil

Ornamental Features

Knock Out® Rose Tree 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 burgundy in the fall. The fruit is not ornamentally significant.

Landscape Attributes

Knock Out® Rose Tree is a deciduous shrub, selected and trained to grow in a small tree-like form with the primary plant grafted high atop a standard. 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

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

  • Mass Planting
  • Hedges/Screening
  • General Garden Use

Planting & Growing

Knock Out® Rose Tree will grow to be about 3 feet tall at maturity, with a spread of 3 feet. It tends to be a little leggy, with a typical clearance of 2 feet from the ground. It grows at a fast 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

This Plant Finder tool is an online catalog representing many of the varieties that we carry over the course of the season, and is intended for informational purposes only. Inventory varies seasonally, so we cannot guarantee that every plant will be in stock at all times - please contact your nearest Platt Hill Nursery store for current availability. It does not include our entire inventory of plants, so be sure to visit us to see varieties that may not be represented on this list.



Bloomingdale: 222 W Lake St, Bloomingdale, IL 60108

Carpentersville: 2400 Randall Rd, Carpentersville, IL 60110

Mon - Sat: 9am to 6pm, Sun: 10am-5pm

We are closed JULY 4th

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