Hydrangea macrophylla 'Horwack' (Next Generation™ Pistachio Hydrangea)


Botanical Information

FamilyHydrangeaceae
GenusHydrangea
Speciesmacrophylla
Cultivar'Horwack'
Tradmarked NameNext Generation™
Patent NumberPPAF
CategoryWoody
TypeShrub (deciduous)

Details

USDA Hardiness Zone6 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone5a - 8a
Canada Hardiness Ref.
RHS Hardiness ZoneH7 - H3
RHS Hardiness Ref.
Temperature (°C)-23 - (-4)
Temperature (°F)-10 - 25
Height1 m
Spread1.5 m
GrowthMedium
Flowering PeriodJune, July, August, September, October

Description and Growing Information

ShapeForms a rounded mound.
CultivationGrow in partial shade in a moist, well-drained soil. Tends to be more winter hardy than many other H. macrophylla cultivars.
PestsAphids may be an occasional nuisance.
HabitatHorticultural origin.
Flower/Leaf Bud DescriptionFlower buds tend to form on old wood.
Leaf DescriptionLeaves to 15 cm in length, and are glossy green.
Flower DescriptionFlowers appear in dense clusters often starting green tinged chartreuse then developing a scarlet red to violet colouring with a chartreuse-green tinge and a small blue eye.

Photographs