SMNHSDD
| Denomination: | 'SMNHSDD' |
|---|---|
| Trade name: | Tuff Stuff Ah-Ha |
| Botanical Name: | Hydrangea macrophylla subsp. serrata |
| Applicant/Holder: |
Spring Meadow Nursery, Inc. 12601 120th Avenue Grand Haven, Michigan 49417 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 Canada Tel: 519-317-7511 |
| Application Date: | 2018-05-01 |
| Provisional Protection:: | 2018-05-01 |
| Application Number: | 18-9445 |
| Grant of Rights Date: | 2022-02-03 |
| Certificate Number: | 6515 |
| Grant of Rights Termination Date: | 2042-02-03 |
Variety Description
Variety used for comparison: 'SMHMLDD' (Let's Dance Diva)
Summary: The upper side of the leaf blade of 'SMNHSDD' is dark green whereas the upper side of the leaf blade of 'SMHMLDD' is light to medium green. The inflorescence of 'SMNHSDD' is shorter than the inflorescence of 'SMHMLDD'. 'SMNHSDD' has a sterile flower that has a smaller diameter than that of 'SMHMLDD'. The sepal of 'SMNHSDD' is smaller than the sepal of 'SMHMLDD'. 'SMNHSDD' has a double type sterile flower with 9-16 sepals whereas 'SMHMLDD' has a single type sterile flower with 2-5 sepals.
Description:
PLANT: non-climbing type, upright to semi-upright growth habit
STEM: no fasciation, green with anthocyanin colouration at nodes, many black lenticels in autumn
LEAF BLADE: no lobing, long tip, rounded base, medium to deep margin incisions, no variegation, dark green upper side, absent or weak to intermediate glossiness of upper side, medium degree of blistering
FLOWERING: begins early
INFLORESCENCE: flattened shape, very conspicuous fertile flowers
STERILE FLOWER: arranged in one whorl, double type, very strong degree of overlapping of sepals
SEPAL OF STERILE FLOWER: 9-16 sepals, no margin incisions
SEPAL OF STERILE FLOWER (INNER SIDE): light blue pink (RHS 62B-C) with light yellow (RHS 4D) at base, lighter than blue pink (RHS 73B) when fully opened, white (RHS N155B) with purple (RHS 75C) at base when aged
PETAL OF FERTILE FLOWER: pink
Origin & Breeding History: 'SMNHSDD' was bred and developed by the breeder, Timothy D. Wood, an employee of Spring Meadow Nursery, Inc. in Grand Haven, Michigan, USA. 'SMNHSDD' originated from an open pollinated cross conducted in 2011 in Grand Haven, Michigan, between the variety 'MAK20', as the female parent, and the variety 'SMHMTAU', as the male parent. 'SMNHSDD' was selected in summer of 2013 for its double type flowers, lace-cap type inflorescence, flower colour, and reblooming. 'SMNHSDD' was first propagated asexually by softwood cuttings in summer of 2013 in Grand Haven, Michigan.
Tests & Trials: The comparative trial for 'SMNHSDD' was conducted in a polyhouse during the spring and summer of 2020, at BioFlora Inc., in St. Thomas, Ontario. The trial included 10 shrubs each of the candidate and reference variety. All shrubs were grown from bare root plants and transplanted into 14 litre containers on August 6, 2019. The observations and measurements were taken from 10 plants or parts of plants of each variety on June 15, 2020. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'SMNHSDD' with reference variety 'SMHMLDD'
Inflorescence height (cm)
| 'SMNHSDD' | 'SMHMLDD' | |
|---|---|---|
| mean | 6.4 | 8.9 |
| std. deviation | 0.91 | 0.88 |
Sterile flower diameter (cm)
| 'SMNHSDD' | 'SMHMLDD' | |
|---|---|---|
| mean | 5.6 | 7.1 |
| std. deviation | 0.48 | 0.47 |
Sepal length (cm)
| 'SMNHSDD' | 'SMHMLDD' | |
|---|---|---|
| mean | 3.0 | 3.7 |
| std. deviation | 0.33 | 0.29 |
Sepal width (cm)
| 'SMNHSDD' | 'SMHMLDD' | |
|---|---|---|
| mean | 2.2 | 3.4 |
| std. deviation | 0.22 | 0.40 |
Click on image for larger view
Hydrangea: 'SMNHSDD' (left) with reference variety 'SMHMLDD' (right)
Click on image for larger view
Hydrangea: 'SMNHSDD' (left) with reference variety 'SMHMLDD' (right)
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