Power Yellow


Denomination: 'Power Yellow'
Botanical Name: Chrysanthemum
Applicant/Holder: Willy's Greenhouses Ltd.
159 Scott Street
Niagara-on-the-Lake, Ontario
L0S 1J0
Breeder: Simon Van Sproson, Willy's Greenhouses Ltd., Niagara-on-the-Lake, Ontario
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 2006-06-09
Application Number: 06-5501
Grant of Rights Date: 2010-02-22
Certificate Number: 3790
Grant of Rights Termination Date: 2028-02-22

Variety Description

Variety used for comparison: 'Yellow Cherie'

Summary: 'Power Yellow' is in the eight week response group while 'Yellow Cherie' is in the seven week response group. 'Power Yellow' has a larger flower head diameter than 'Yellow Cherie'. The attitude of the ray floret relative to the floral axis is at right angles for 'Power Yellow' while it is ascending for 'Yellow Cherie'. 'Power Yellow' has shorter ray florets than 'Yellow Cherie'. The outer side of the ray floret is brown red and yellow for 'Power Yellow' while it is yellow green for 'Yellow Cherie'.


PLANT: year round cultivation for pot production, spray flowering type, 8 week response group, very short to short height, medium to many primary lateral shoots
STEM: short to medium internode length, medium thickness, no anthocyanin colouration, medium to strong strength

LEAF: ascending to horizontal attitude, medium to long, medium width, small length to width ratio, dark green on upper side, broad wedge base shape, short lower lobe, diverging margins of sinus between lateral lobes, terminal lobe with teeth present, no secondary lobes on terminal lobe

INFLORESCENCE: cylindrical form, no secondary lateral flower heads, medium number of flower heads showing colour when terminal head is fully expanded
FLOWER HEAD: single, daisy type, self coloured, yellow colour group, medium to deep intensity of colour, medium diameter, peduncle medium in thickness
RAY FLORETS: at right angles relative to floral axis, medium to large number, bracts present among florets, outer florets medium to long in length and medium in width, small length to width ratio, straight along longitudinal axis, no pubescence on outer side, tip rounded with notch, outer side brown red when floret is expanding, outer side brown red and yellow when fully expanded, inner side yellow when fully expanded
DISC: medium diameter, yellow green before anther dehiscence, yellow after dehiscence, tubular, type 4 distribution, short disc florets.

Origin & Breeding History: 'Power Yellow' was discovered as a naturally occurring chance mutation of the variety 'Apricot Cherie'. It was selected for its improved flower colour in March of 2005 at Niagara on the Lake, Ontario. Asexual reproduction by stem cuttings was first conducted in March 2005.

Tests & Trials: Trials for 'Power Yellow' were conducted at Niagara on the Lake, Ontario in the Fall of 2008. The trial consisted of 15 plants of each variety, grown in 12.5 cm pots in the greenhouse. The plants were spaced 15 cm apart. Observations and measurements were taken on 10 plants of each variety. Colours were determined using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison table for 'Power Yellow' with reference variety 'Yellow Cherie'

Colour of ray floret (RHS)

  'Power Yellow' 'Yellow Cherie'
outer side - newly opened 180C-D 3C
outer side - mature floret 180D and 7D 3C
inner side - mature floret 7C-D 7C-D

Click on image for larger view
Power Yellow
Chrysanthemum: 'Power Yellow' (left) with reference variety 'Yellow Cherie' (right)

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