Denomination: 'SMNHPRZEP'
Trade name: Zinfin Doll
Botanical Name: Hydrangea paniculata
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: 2014-07-18
Application Number: 14-8395

Variety Description

Varieties used for comparison: 'Limelight' and 'SMNHPPINKA'

Summary: The plants of 'SMNHPRZEP' are shorter than the plants of 'Limelight'. The leaf blade of 'SMNHPRZEP' is broader than the leaf blade of 'Limelight' and 'SMNHPPINKA'. The sterile flower of 'SMNHPRZEP' is larger in diameter and has larger sepals than the sterile flower of 'Limelight'. The overlapping of the sterile flower sepals is absent or very weak for 'SMNHPRZEP', whereas the overlapping of the sepals of 'SMNHPPINKA' is weak to medium. When fully open, the inner side of the sepal of the sterile flower of 'SMNHPRZEP' is light yellow with light green tones changing to white, whereas the sepal of the sterile flower of 'SMNHPPINKA' is white. When aged, the inner side of the sepal of the sterile flower of 'SMNHPRZEP' is blue-pink with white tones changing to purple to purple red on the lower flowers of the inflorescence, and white on the upper flowers, whereas the sepal of the sterile flower of 'Limelight' is white and grey throughout the inflorescence.


PLANT: non-climbing type, semi-upright growth habit
STEM: no fasciation, brown (greyish), black lenticels

LEAF BLADE: no lobing, elliptic shape, medium length of tip, obtuse base, shallow to medium depth of incisions of margin, no variegation, medium green on upper side, no secondary colour, moderate degree of glossiness of upper side, weak blistering

FLOWERING: begins mid-season
INFLORESCENCE: conical shape, inconspicuous or slightly conspicuous fertile flowers
STERILE FLOWER: single type, absent or very weak degree of overlapping of sepals, incisions of margin absent on all sepals
SEPAL OF STERILE FLOWER (INNER SIDE): yellow green (RHS 4C) when newly open, light yellow (RHS 4D) with light green tones (RHS 155B) changing to white (RHS 155C) when fully open, blue pink (RHS 63B-C) with white tones (RHS 155C) changing to purple to purple red (RHS 59C-D) on aged lower flowers of inflorescence, white (RHS 155C) on aged upper flowers of inflorescence

Origin & Breeding History: 'SMNHPRZEP' was bred and developed by the breeder, Timothy D. Wood, an employee of Spring Meadow Nursery, Inc., in Grand Haven, Michigan, USA. It originated from an open pollinated cross that occurred in July 2004, in Grand Haven, Michigan, between the Hydrangea paniculata variety 'Little Lamb', as the female parent, and pollen from an unknown male parent. 'SMNHPRZEP' was selected in July 2009, for its strong stems, prolific blooming, and flower colour. Asexual reproduction of 'SMNHPRZEP' was first conducted using softwood to semi-hardwood cuttings, in June 2010, in Grand Haven, Michigan, USA.

Tests & Trials: The comparative trial for 'SMNHPRZEP' was conducted in an outdoor irrigated container trial during the spring and summer of 2016, at Bioflora Inc., in St. Thomas, Ontario. The trial included a total of 10 plants of the candidate variety and 8 plants of the reference variety. All plants were grown from rooted cuttings and transplanted into 13.2 litre containers on July 13, 2015. The observations and measurements were taken from 10 plants or parts of plants, of each variety, on July 30, 2016. The late (aged) flower color was recorded on August 15, 2016. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'SMNHPRZEP' with reference varieties 'Limelight' and 'SMNHPPINKA'

Plant height including florescence (cm)

mean 76.3 94.7 75.7
std. deviation 6.60 9.05 8.0

Leaf blade width (cm)

mean 7.2 6.7 6.2
std. deviation 0.25 0.43 0.73

Diameter of calyx of sterile flower (cm)

mean 4.0 2.9 3.2
std. deviation 0.53 0.3 0.22

Sterile flower sepal length (cm)

mean 2.0 1.4 1.6
std. deviation 0.3 0.18 0.11

Sterile flower sepal width (cm)

mean 1.2 1.0 1.2
std. deviation 0.16 0.10 0.12

Colour of inner side of sepal of sterile flower (RHS)

newly open 4C 4C 4C
fully open 4D with 145B-D tones changing to 155C 4D with 145B-D tones 155C, NN155C
aged lower sterile flowers of inflorescence are 63B-C with 155C tones changing to 59C-D; upper sterile flowers of inflorescence are 155C 155C,157C 62B-C with 155C tones, changing to 59D with 157A tones

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

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

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

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