Hydrangea aspera subsp. sargentiana (Big-Leaf Hydrangea, Sargent's Hydrangea)


Botanical Information

FamilyHydrangeaceae (Saxifragaceae)
GenusHydrangea
Speciesaspera
Subspeciessargentiana
SynonymsHydrangea sargentiana
CategoryWoody
TypeShrub (deciduous)
OriginNative to Hubei province in central China.

Details

USDA Hardiness Zone6 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone5a - 8a
Canada Hardiness Ref.
RHS Hardiness ZoneH3 - H7
RHS Hardiness Ref.
Temperature (°C)-23 - (-1)
Temperature (°F)-10 - 30
Height1 - 2 m
Spread1 - 2 m
GrowthMedium
Flowering PeriodJuly, August, September

Description and Growing Information

General DescriptionA large-leaved, upright deciduous shrub with attractive large and soft leaves.
ShapeRounded.
LandscapeAs a hedge or in informal group plantings.
CultivationGrow under partial shade in moist, well-drained rich soil. Highly acidic soil will produce a blue flower – alkaline soil produces a pink to purple colour.
PestsAphids, bacterial wilt, mildew, bud blight and leaf spot.
Notable SpecimensRHS Garden Rosemoor, North Devon, England.
HabitatDense forest valleys and slopes.
Leaf DescriptionOpposite, softly textured, finely serrate margins and reticulate venation.
Flower DescriptionVery attractive, smaller, fertile central purple-blue flowers surrounded by larger, white sterile ray flowers.
Texture DescriptionMedium.

Photographs