Betula grossa (Japanese Cherry Birch)


Botanical Information

FamilyBetulaceae
GenusBetula
Speciesgrossa
CategoryWoody
TypeTree (deciduous)
ReferencesMichael A. Dirr, M.A.D..(2009). Manual of Woody Landscape Plants. Athens, Georgia: Stipes Publishing L.L.C
OriginJapan (Honshu, Kyushu and Shikoku) and introduced to the west in 1896.

Details

USDA Hardiness Zone4 - 6
USDA Hardiness Ref.
Canadian Hardiness Zone5 - 7
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-26
Temperature (°F)-15
Height6-7 m
Spread6-9 m
GrowthMedium
Flowering PeriodMay, June

Description and Growing Information

General DescriptionThis birch is a deciduous tree with year-round interest from its light, curly exfoliating bark, deep green leaves in the summer, warm yellow leaves in autumn and the tree's remarkable winter silhouette.
ID CharacteristicLong catkins that are dark yellow in colour. Short petiole (1.25 - 2.5 cm long) and thin, curly paper bark.
ShapeSpreading open crown upon maturity.
LandscapeUrban landscape.
CultivationWell-drained, moist soil. Types of soils are sand, clay and loam. Needs partial to full sun and slightly acidic soils (pH 5.0 - 6.5).
PestsBronze birch borer.
Notable SpecimensThe Arnold Arboretum, Harvard University, Jamaica Plains, Massachusetts, United States of America.
HabitatMountain valleys of Japan.
Bark/Stem DescriptionRedish-brown exterior and soft cherry pink underlay. Light curly paper texture that coarsens with age.
Flower/Leaf Bud DescriptionMedium sized buds featuring about 5 silky scales on each. Pigment ranges from green to brown.
Leaf Description8 cm long and about 4 cm wide. Ovate blade form with short double toothed edges. About 10 to 15 veins in pairs. The simple leaf arrangement is alternate.
Flower DescriptionMale and female catkins that are long and yellow-brown in colour.
Colour DescriptionMedium brown bark with a light cherry pink underlay. Wintergreen stems that hold onto yellowish-brown catkins and dark green leaves that turn yellow in autumn.

Photographs