Denomination: 'Youmeone'
Trade name: Forever
Botanical Name: Hydrangea macrophylla
Applicant/Holder: Irie, Ryoji
3-7 Narutaki Honmachi Ukyoku
Ukyo Ku, Kyoto
Breeder: Ryoji Irie, Ukyo Ku, Kyoto, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2005-06-02
Application Number: 05-4933
Date abandoned: 2012-05-04

Variety Description

Variety used for comparison: 'Youmethree' (Emotion)

Summary: The plants of 'Youmeone' produce a lower number of branches than the plants of 'Youmethree'. The leaf blade of 'Youmeone' is medium green while the leaf blade of 'Youmethree' is dark green.


PLANT: non-climbing, broad upright growth habit
STEM: no fasciation, green, few reddish brown lenticels in spring

LEAF: no lobing, medium length tip, weakly cordate base, medium depth margin incisions, no variegation, medium green, weak glossiness on upper side, weak blistering

INFLORESCENCE: early flowering, globular shape, fertile flowers slightly inconspicuous
STERILE FLOWER: double, medium overlapping of sepals
STERILE FLOWER SEPALS : incisions present on margin of some sepals, outer sepals light blue pink to light blue violet (RHS 69B-C), inner sepals light blue pink (RHS 69A-B), central sepals light yellow (RHS 4D).

Origin & Breeding History: The hydrangea variety 'Youmeone' originated from a pollination made in Kyoto, Japan in May 1993. The female parent was an unnamed plant from the breeder's collection and the male parent was the variety 'Sumidanohanabi'. The variety was selected from the cross in June 1994, based on criteria for flower colour, flower appearance and inflorescence development traits. Propagation of the variety by vegetative cuttings was first conducted in the spring of 1995 in Kyoto, Japan.

Tests & Trials: Trials for 'Youmeone' were conducted in polyhouse during the winter and spring of 2010 in St. Thomas, Ontario. The trial included 10 plants of the candidate variety and reference variety. All plants were grown from unrooted cuttings that were rooted in the early spring of 2009 and grown in St. Catharines, Ontario. All plants were finished in St. Thomas, Ontario in the spring of 2010. Observations and measurements were taken from 10 plant parts of each variety on May 6, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison table for 'Youmeone' with reference variety 'Youmethree'

Number of branches

  'Youmeone' 'Youmethree'
mean 4.3 6.6
std. deviation 0.50 1.81

Click on image for larger view
Hydrangea: 'Youmeone' (left) with reference variety 'Youmethree' (right)

Click on image for larger view
Hydrangea: 'Youmeone' (left) with reference variety 'Youmethree' (right)

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