Denomination: 'Yoleamington'
Trade name: Leamington
Botanical Name: Chrysanthemum
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Wendy Bergman, Syngenta Flowers, Inc., Alva, United States of America
Agent in Canada: Keepsake Plants, Ltd.
P.O. Box 370
268 Seacliff Drive West
Leamington, Ontario
N8H 3W3
Tel: 519-326-6121; Ext.224
Application Date: 2004-04-02
Application Number: 04-4160
Date Withdrawn: 2008-11-24

Variety Description

Variety used for comparison: 'Yopresidio' (Presidio)

Summary: 'Yoleamington' has a shorter plant with shorter leaf blades than 'Yopresidio'. The flower head colour group of 'Yoleamington' is orange pink while it is pink for 'Yopresidio'. The secondary/over-colour on the upper side of the ray floret is light blue violet with light yellow brown in the centre for 'Yoleamington' while it is violet with darker violet on the inner ray florets of 'Yopresidio'.


PLANT: year round cultivation for pot production, spray flowering type, 8 week response group
STEM: green, no anthocyanin colouration

LEAF: dark green, 1.6:1 length/width ratio, truncate base, parallel to converging margins of sinus between lateral lobes

INFLORESCENCE: corymbiform
FLOWER HEAD: double decorative type, chromatic self colour type, light orange pink colour group, dense ray florets
RAY FLORET: incurved inner ray florets, ligulate outer ray florets, longitudinal axis of majority is straight, mostly concave in cross-section, convex apex on aged ray florets, emarginate to mamillate tip, upper side is light blue violet with darker blue violet and light yellow brown over-colour, very light mottled colour pattern on upper side, light blue violet on lower side

Origin & Breeding History: 'Yoleamington' is a product of a planned breeding program conducted by the breeder, Mrs. Wendy R. Bergman, an employee of Yoder Brothers, Inc. in Barberton, Ohio, USA. It originated from a cross between proprietary Chrysanthemum seedling selection designated 'YB-A0517' as the female parent and another proprietary Chrysanthemum seedling selection designated 'YB-5781' as the male parent. This cross was conducted by the breeder in February 2000, in Salinas, California, USA. 'Yoleamington' was discovered and selected in November 2000, as a single flowering plant among the progeny of the stated cross growing in a controlled environment in Alva, Florida, USA. The selection of this plant was based on its uniform plant growth habit, desirable inflorescence form and floret colours, fast response time and excellent post-production longevity. Asexual reproduction of 'Yoleamington' by vegetative tip cuttings was first conducted in Alva, Florida, USA in March 2001.

Tests & Trials: Trials for 'Yoleamington' were conducted in the fall of 2007 at Yoder Canada Ltd. in Leamington, Ontario. They were performed under greenhouse conditions similar to those used in commercial Chrysanthemum production. 40 unrooted cuttings per variety were directly stuck into 15 cm pots with 4 cuttings per pot and 10 pots per variety. The pots were spaced 30 cm apart. The plants were pinched once prior to short day treatment. All plants had the central bud removed. Observations and measurements were taken from 10 plants of each variety on October 29, 2007. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Yoleamington' with reference variety 'Yopresidio'

Plant height (cm)

  'Yoleamington' 'Yopresidio'
mean 26.7 33.9
std. deviation 0.74 2.03

Leaf length (cm)

  'Yoleamington' 'Yopresidio'
mean 6.8 8.7
std. deviation 0.31 0.52

Colour of upper side of ray floret (RHS)

  'Yoleamington' 'Yopresidio'
main colour 69D whiter than 69D
over-colour 69C with tones of 159A in centre 75D and 75C on inner florets

Colour of ray floret (RHS)

  'Yoleamington' 'Yopresidio'
lower side 69C-D whiter than 69D

Click on image for larger view
Chrysanthemum: 'Yoleamington' (left) with reference variety 'Yopresidio' (right)

Click on image for larger view
Chrysanthemum: 'Yoleamington' (left) with reference variety 'Yopresidio' (right)

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