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Denomination: 'Radsunny'
Trade name: Sunny 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: 2008-06-23
Application Number: 08-6390
Grant of Rights Date: 2014-09-17
Certificate Number: 4875
Grant of Rights Termination Date: 2032-09-17

Variety Description

Variety used for comparison: 'Golden Wings'

Summary: The young shoot of 'Radsunny' has weak anthocyanin colouration while that of 'Golden Wings' has none. The stem of 'Radsunny' has few prickles while that of 'Golden Wings' has a medium number to many prickles. The flower of 'Radsunny' has a greater number of petals than that of 'Golden Wings'. The flower of 'Radsunny' has a strong fragrance while that of 'Golden Wings' has a medium fragrance. The inner side of the petal of 'Radsunny' is light yellow fading to lighter yellow with age while it is light yellow fading to light yellow orange for 'Golden Wings'. The filament of 'Radsunny' is medium yellow while it is light yellow and pink for 'Golden Wings'. The seed vessel at petal fall is small for 'Radsunny' while it is medium sized for 'Golden Wings'.


PLANT: shrub type, semi-upright habit
YOUNG SHOOT: very weak anthocyanin colouration
STEM: few reddish prickles

LEAF: medium to large, medium to dark intensity of green on upper side, no anthocyanin colouration, absent or very weak glossiness of upper side
LEAFLET: absent or very weak undulation of margin
TERMINAL LEAFLET: ovate, rounded base, acuminate apex

FLOWERING SHOOT: no flowering laterals, very few to few flowers
FLOWER BUD: medium ovate in longitudinal cross section
FLOWER: semi-double, round, yellow colour group, medium density of petals, flattened convex profile of upper and lower part, strong fragrance
SEPAL: medium strength extensions
PETAL: no reflexing of petals one-by-one, obcordate, absent or very weak incisions, absent or very weak reflexing of margin, weak undulation, medium size, light yellow (RHS 8B) fades to lighter yellow (RHS 8C-D) on inner and outer side
BASAL SPOT: small, medium yellow
OUTER STAMEN: medium yellow filament

SEED VESSEL: small at petal fall
HIP: pitcher-shape in longitudinal section

Origin & Breeding History: 'Radsunny' originated from a controlled cross-pollination conducted in Greenfield, Wisconsin, United States. A cross between the female parent 'Radbrite' and the male parent 'Radsweet' was conducted in the summer of 2001. In the fall of 2005, one seedling was selected for its improved flower colour, vigorous vegetation with attractive foliage and a round shrub rose growth habit.

Tests & Trials: Trials for 'Radsunny' were conducted in a polyhouse during the summer of 2013 at Variety Rights Management in Oxford Station, Ontario. The trial included a total of 14 plants of the candidate variety and 9 plants of the reference variety. All plants were grown in 22 cm pots and spaced 45 cm apart. Observations and measurements were taken from 10 plants of the candidate variety and 9 plants of the reference variety, or 10 parts of plants of both varieties in July 2013. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Radsunny' with reference variety 'Golden Wings'

Number of petals

  'Radsunny' 'Golden Wings'
mean 9.33 4.88
std. deviation 1.58 0.35

Colour of petal on inner and outer side (RHS)

  'Radsunny' 'Golden Wings'
main 8B fades to 8C-D 4D fades to 11D

Click on image for larger view
Rose: 'Radsunny' (left) with reference variety 'Golden Wings' (right)

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