Denomination: 'Rensun'
Trade name: Sundae Fraise
Botanical Name: Hydrangea paniculata
Applicant/Holder: Renault, Jean
Le Brin D'Eau, FR-53120
Breeder: Jean 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: 2011-07-14
Application Number: 11-7320
Grant of Rights Date: 2013-08-19
Certificate Number: 4609
Grant of Rights Termination Date: 2031-08-19

Variety Description

Varieties used for comparison: 'DVP Pinky' (Pinky Winky) and 'Little Lamb'

Summary: The leaf blade of 'Rensun' is shorter and narrower than the leaf blade of 'DVPPinky' and 'Little Lamb'. The inflorescence of 'Rensun' is longer than the inflorescence of 'Little Lamb'. The inflorescence of 'Rensun' has less conspicuous fertile flowers than 'DVPPinky'. The sterile flower of 'Rensun' is smaller in diameter than the sterile flower of 'DVPPinky'.


PLANT: non-climbing, semi-upright
STEM: no stem fasciation, brownish with red on new stems, white lenticels

LEAF: no lobing, ovate and elliptic, short tip, obtuse base, very shallow incisions, no variegation, upper side medium green with absent or weak glossiness, weak blistering

FERTILE FLOWER: inconspicuous or slightly inconspicuous, white
STERILE FLOWER: single, medium overlapping of sepals, incisions absent on all sepals, light yellow (RHS 4D) when newly opened, white (RHS 155A) with overlay of light green (RHS 145D) when fully open, aging to white (RHS 155A) with light blue pink (RHS 62B-D) towards margin.

Origin & Breeding History: The variety 'Rensun' originated as seedling from an unknown Hydrangea paniculata plant, discovered in Gorron, France. Seed of the unknown parent were sown and the resultant seed from selected plants were subsequently sown. 'Rensun' was selected in 2005 after multiple cycles of sibling crosses. The variety was selected for its compact and uniform growth habit and interesting flower colour that transitions from white to pink in the summer.

Tests & Trials: Trials for 'Rensun' were conducted in an outdoor container trial during the summer of 2012 in St. Thomas, Ontario. The trial included a total of 10 plants of the candidate variety and 8 plants of the reference variety. The candidate variety was grown from bare-rooted plants planted into 2.2 litre containers in April 2011 and transplanted into 13.2 litre containers on July 20, 2011. The reference plants were grown from 11 cm liners and planted into 13.2 litre containers on July 20, 2011. Observations and measurements were taken from 10 plants of each variety on June 26, 2012. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Rensun' with reference varieties 'DVP Pinky' and 'Little Lamb'

Leaf blade length (cm)

  'Rensun' 'DVP Pinky' 'Little Lamb'
mean 6.7 12.5 8.1
std. deviation 0.56 1.37 0.82

Leaf blade width (cm)

  'Rensun' 'DVP Pinky' 'Little Lamb'
mean 3.7 6.3 4.8
std. deviation 0.39 0.43 0.58

Inflorescence height (cm)

  'Rensun' 'DVP Pinky' 'Little Lamb'
mean 18.5 20.0 14.0
std. deviation 1.61 1.31 1.32

Sterile flower diameter (cm)

  'Rensun' 'DVP Pinky' 'Little Lamb'
mean 2.5 3.3 2.7
std. deviation 0.16 0.20 0.36

Click on image for larger view
Hydrangea: 'Rensun' (left) with reference variety 'DVPPinky' (centre) and 'Little Lamb' (right)

Click on image for larger view
Hydrangea: 'Rensun' (left) with reference variety 'DVPPinky' (centre) and 'Little Lamb' (right)

Click on image for larger view
Hydrangea: 'Rensun' (left) with reference variety 'DVPPinky' (centre) and 'Little Lamb' (right)

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