Denomination: 'Renhy'
Trade name: Vanilla Strawberry
Botanical Name: Hydrangea paniculata
Applicant/Holder: Renault, Eric
Le Petit Cour Janvier
Ambrieres les Vallées

Renault, Jean
Le Brin D'Eau, FR-53120
Tel: 33-2-43-08-69-07

Renault, Thierry
Rue Ambroise Paré
Breeder: Eric Renault, Ambrieres les Vallées, France
Jean Renault, Gorron, France
Thierry Renault, Gorron, France
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2007-02-23
Application Number: 07-5749
Grant of Rights Date: 2010-10-18
Certificate Number: 3963
Grant of Rights Termination Date: 2028-10-18

Variety Description

Varieties used for comparison: 'Unique' and 'Pink Diamond'

Summary: 'Renhy' has a larger leaf than 'Unique'. The infloresecence of 'Renhy' is dense while in 'Unique' and 'Pink Diamond' the infloresecence has a sparse to medium density. 'Renhy' has serrate incisions on the margin of the sepal while in 'Pink Diamond' they are crenate. The large calyx of 'Renhy' has a smaller diameter than the reference varieties. The sepals of the large calyx of 'Renhy' are narrower compared to the reference varieties.


PLANT: upright growth habit, strong anthocyanin colouration on the stem

LEAF: medium green on upperside, no variegation, weak glossiness on upper side, strong anthocyanin colouration at the base of midrib, ovate shape, acuminate apex, cuneate to obtuse base, no lobing, fine incisions on the margin, strong anthocyanin colouration on the petiole

INFLORESCENCE: inconspicuous small calyx, conical (mophead) shape, dense, strong anthocyanin colouration on the peduncle
LARGE CALYX: absent to very weak intensity of colouration, light yellow green (RHS 1D) when newly opened, white (RHS 155A) with pink tones when fully opened at early maturity, purple red (RHS N57C-D) when aged, 4 sepals, weak to medium degree of overlapping of sepals present, serrate incisions on margins of sepals.

Origin & Breeding History: 'Renhy' was developed in Garron, France from a seedling descended from the Hydrangea variety 'Unique' discovered in 1987. 'Renhy' was selected in 2002 after multiple cycles of sibling crosses. The new variety was selected based on its long bloom period, and flower colour that transitions from white, to pink and then to red in the early summer.

Tests & Trials: Trials for 'Renhy' were conducted in an outdoor container trial during the summer of 2009 in St. Thomas, Ontario. The trial included 10 plants of the candidate variety and reference variety. All plants were grown from rooted cuttings transplanted into 7.6 litre containers in the spring of 2008. Trials were arranged with 1/2 meter spacing between plants. Observations and measurements were taken from 10 plants of each variety on June 1, 2009. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Renhy' with reference varieties 'Unique' and 'Pink Diamond'

Leaf length (cm)

  'Renhy' 'Unique' 'Pink Diamond'
mean 7.6 6.1 7.4
std. deviation 0.31 0.52 0.59

Leaf width (cm)

  'Renhy' 'Unique' 'Pink Diamond'
mean 4.2 2.4 3.7
std. deviation 0.36 0.23 0.37

Large calyx diameter (cm)

  'Renhy' 'Unique' 'Pink Diamond'
mean 3.6 3.9 4.4
std. deviation 0.26 0.29 0.32

Large calyx sepal width (cm)

  'Renhy' 'Unique' 'Pink Diamond'
mean 1.5 1.8 1.8
std. deviation 0.08 0.14 0.13

Click on image for larger view
Hydrangea: 'Renhy' (left) with reference varieties 'Unique' (centre) and 'Pink Diamond' (right)

Click on image for larger view
Hydrangea: 'Renhy' (left) with reference varieties 'Unique' (centre) and 'Pink Diamond' (right)

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