Denomination: 'Robert'
Trade name: Let's Dance Moonlight
Botanical Name: Hydrangea macrophylla
Applicant/Holder: Spring Meadow Nursery, Inc.
12601 120th Avenue
Grand Haven, Michigan
United States of America
Breeder: Timothy D. Wood, Spring Lake, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2007-07-13
Application Number: 07-5971
Grant of Rights Date: 2011-05-31
Certificate Number: 4070
Grant of Rights Termination Date: 2029-05-31

Variety Description

Variety used for comparison: 'Bailmer' (Endless Summer)

Summary: The leaves of 'Robert' are smaller than the leaves of 'Bailmer'. The sterile sepal of 'Robert' is blue pink to light blue pink while the sterile sepal of 'Bailmer' is blue pink with violet along the margin.


PLANT: non-climbing, upright to semi-upright growth habit
STEM: no fasciation, green, absent or a few red lenticels in spring

LEAF: no lobing, elliptic, medium length tip, acute and obtuse base, shallow to medium depth margin incisions, no variegation, medium to dark green, moderate glossiness on upper side, weak blistering

INFLORESCENCE: early flowering, globular shape, fertile flowers inconspicuous or slightly inconspicuous
STERILE FLOWER: single, weak to medium overlapping of sepals
STERILE FLOWER SEPALS : incisions present on margin of some sepals, sepals blue pink (RHS 65A) to light blue pink (RHS 65B) with white (RHS 155B) at base.

Origin & Breeding History: The hydrangea variety 'Robert' originated from an open pollination made in Grand Haven, Michigan, USA in July 2003. The pollination was between the female parent 'Bailmer' and an unknown male parent. The new variety was selected from the progeny in May 2005, based on criteria for foliage colour, flowering on new growth without vernalization, inflorescence size and flower colour. Propagation by softwood cuttings was first conducted in June 2005 in Grand Haven, Michigan, USA.

Tests & Trials: Trials for 'Robert' were conducted in an outdoor container trial during the spring of 2010 in St. Thomas, Ontario. The trial included 10 plants of the candidate variety and reference variety. All plants were grown from rooted cuttings which were transplanted into 3 gallon containers in the spring of 2010. Observations and measurements were taken from 10 plants of each variety on May 31, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Robert' with reference variety 'Bailmer'

Leaf blade length (cm)

  'Robert' 'Bailmer'
mean 8.1 15.0
std. deviation 0.99 1.20

Leaf blade width (cm)

  'Robert' 'Bailmer'
mean 5.1 8.0
std. deviation 0.59 0.85

Colour of sepal (RHS)

  'Robert' 'Bailmer'
upper side 65A-B, 155B at base N74D with 75A-B along margin, NN155C at base

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

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

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