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Denomination: 'Radrazz'
Previously Proposed Denomination: 'Knock Out'
Trade name: Knock Out
Botanical Name: Rosa
Applicant/Holder: The Conard-Pyle Company
8 Federal Road, Suit 6
West Grove, Pennsylvania
United States of America
Breeder: William J. Radler, Greenfield, United States of America
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 1999-05-25
Application Number: 99-1678
Grant of Rights Date: 2001-07-06
Certificate Number: 0993
Grant of Rights Termination Date: 2019-07-06

Variety Description

Variety used for comparison: 'Nearly Wild'

Summary: 'Radrazz' is a shrub rose variety with a more upright growth habit than 'Nearly Wild' and a wider, darker green leaf. The main distinguishing characteristic is the colour of the buds and flowers. 'Radrazz' has much deeper pink flowers than 'Nearly Wild' and a smaller basal petal spot. There are more petals in the flowers of 'Radrazz' and the style is red, whereas the style of 'Nearly Wild' is pale yellow-green.


'Radrazz' is a shrub rose variety with an upright to bushy growth habit. The leaves are moderately glossy and usually have three to five leaflets. 'Radrazz' flowers almost continuously for 10 weeks or more. There are less than four flowers per flowering shoot. The bud is pointed and the sepal extensions are medium to strong. The flower is deep pink in colour and typically has 7 to 9 petals. The spots at the base of the outer and inner side of the petal are very small. 'Radrazz' has a red style.

Origin & Breeding History: 'Radrazz' originated from the cross between a seedling of the variety 'Carefree Beauty' and a 'Razzle Dazzle' seedling. The cross took place in Greenfield, Wisconsin. The selection criteria included hardiness, disease resistance, everblooming ability and attractiveness.

Tests & Trials: Tests and trials for 'Radrazz' took place at Oxford Station, Ontario during the summer of 1999. The trials consisted of 15 plants per variety, planted in pots. Measured characteristics were based on a minimum of 10 measurements.

Comparison tables for 'Radrazz' with reference variety 'Nearly Wild'

Entire leaf length (mm)

  'Radrazz' 'Nearly Wild'
mean 108.3 108.9
standard deviation 12.34 13.25

Entire leaf width (mm)

  'Radrazz' 'Nearly Wild'
mean 91.7 77.7
standard deviation 9.31 10.90

Colour of flower bud (RHS)

  'Radrazz' 'Nearly Wild'
upper surface 57A 66A
under surface 58B 57B

Overall flower colour

  'Radrazz' 'Nearly Wild'
RHS 57A 57D

Colour of inner side of petal (RHS)

  'Radrazz' 'Nearly Wild'
margin 57A 68C
middle zone 66A 57D
base 66C 65A

Colour of outer side of petal (RHS)

  'Radrazz' 'Nearly Wild'
margin 66A 64C
middle zone 57B 57C
base 66C 57D
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