Denomination: 'Bombshell'
Botanical Name: Hydrangea paniculata
Applicant/Holder: Schoemaker, Alex Frederik
Rijneveld 37
NL 2771 XX
Breeder: Alex Frederik Schoemaker, Boskoop, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2009-05-22
Application Number: 09-6648
Grant of Rights Date: 2012-12-14
Certificate Number: 4451
Grant of Rights Termination Date: 2030-12-14

Variety Description

Variety used for comparison: 'Jane' (Little Lime)

Summary: The plants of 'Bombshell' are shorter in height than the plants of 'Jane'. The leaf blade of 'Bombshell' is shorter and narrower than the leaf blade of 'Jane'. The sepal on the sterile flower of 'Bombshell' is white when fully opened while the sepal on the sterile flower of 'Jane' is light green when fully opened. The time of flowering for 'Bombshell' is mid summer while the time of flowering for 'Jane' is late summer.


PLANT: non-climbing, semi-upright growth habit
STEM: no fasciation, brownish

LEAF BLADE: no lobing, ovate, short tip, rounded base, medium depth of incisions, no variegation, medium green, absent or very weak glossiness, weak blistering

INFLORESCENCE: conical, inconspicuous or slightly inconspicuous fertile flowers, flowers mid summer
STERILE FLOWER: single, absent or very weak overlapping of sepals, no incisions of margin, sepal light green (more yellow than RHS N144D) when newly opened, white (RHS 155C) when fully opened, aged flower develops red pink (RHS 50C) overlay

Origin & Breeding History: The variety 'Bombshell' was discovered by the breeder in Boskoop, Netherlands in May of 2003. 'Bombshell' originated from a naturally occurring branch mutation on a plant of Hydrangea paniculata 'Grandiflora'. The new variety was selected in 2003 based on the abundance of sterile flowers, sepal colour and form, panicle shape, long bloom period and compact growth habit. Asexual reproduction of the new variety was first conducted by softwood stem cuttings in July 2003 in Boskoop, Netherlands.

Tests & Trials: Trials for 'Bombshell' were conducted during the summer of 2011, in St. Thomas, Ontario. The trial included a total of 10 plants of the candidate variety and 7 plants of the reference variety. All plants were grown from rooted cuttings transplanted into 2 gallon containers in the spring of 2010 and transplanted to the field in the fall of 2010. Observations and measurements were taken from 10 plants of the candidate variety and 7 plants of the reference variety on July 26, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Bombshell' with reference variety 'Jane'

Plant height (cm)

  'Bombshell' 'Jane'
mean 54.1 93.4
std. deviation 5.37 7.06

Leaf blade length (cm)

  'Bombshell' 'Jane'
mean 6.0 9.5
std. deviation 0.35 1.42

Leaf blade width (cm)

  'Bombshell' 'Jane'
mean 3.7 5.4
std. deviation 0.53 0.78

Colour of sterile flower (RHS)

  'Bombshell' 'Jane'
sepal - fully opened 155C 145B-C

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

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

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