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Knock Out® Rose Tree

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Knock Out® Rose Tree (Rosa ‘Radtko’)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

Characteristics

Average Landscape Height:
3 feet
Average Landscape Width:
3 feet
Growth Rate:
fast
Genus:
Rosa
Cultivar:
Radrazz
Flower Color:
cherry red
Flower Period:
from late spring to early fall
Summer Foliage Color:
dark green
Fall Color:
burgundy
Minimum Light:
full sun
Maximum Light:
full sun
Minimum Moisture:
average
Maximum Moisture:
moist
Plant Form:
lollipop
Canopy:
leggy
Pruning:
late winter pruning
Pollution Tolerance:
medium
Other Species Names:
Knockout Rose
Branching:
excurrent
Flower Bud Color:
ruby
Flower Fragrance:
medium

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 deciduous foliage which emerges burgundy in spring. The glossy oval compound leaves are highly ornamental and turn an outstanding burgundy in the fall.

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.

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.

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