Acer palmatum 'Emperor I' (Emperor I Japanese Maple)


Botanical Information

FamilySapindaceae (Aceraceae)
GenusAcer
Speciespalmatum
Cultivar'Emperor I'
CategoryWoody
TypeShrub (deciduous)

Details

USDA Hardiness Zone5 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone6
Canada Hardiness Ref.
RHS Hardiness ZoneH4 - H7
RHS Hardiness Ref.
Temperature (°C)- 20 - (-5)
Temperature (°F)- 4 - 23
Height3 - 5 m
Spread3 - 5 m
GrowthMedium
Flowering PeriodApril

Description and Growing Information

ShapeRound to broad-rounded and low branching.
LandscapeSpecimen, accent planting and border.
PropagationGrafted.
CultivationFull sun and partial-shade. Moist, organically rich, slightly acidic and well-drained soil. Prefers sandy loam.
PestsStem canker, leaf spots, fusarium, verticillium, botrytis, anthracnose and root rots may be a problem. Aphids, scale, borers and root weevils may be troublesome.
Notable SpecimensWestonbirt, The National Arboretum, Tetbury, Gloucestershire, England.
HabitatHorticultural origin.
Leaf Description5 - 7 serrate, deeply-cut lobes. The lobes are broadest in the middle with long tapered tips.
Flower DescriptionSmall, flowers in umbels.
Fruit DescriptionSamaras that are 1 - 2 cm long and grow in paris. They ripen in September - October.
Colour DescriptionThe leaves are dark purple or red in spring and summer, turning a scarlet red in fall. Samaras are yellow, reddish-purple and bronze.

Photographs