Acer palmatum 'Atropurpureum' (Purple-Leaf or Red Japanese Maple)


Michael's Opinion

A popular and beautiful tree for a garden. Even though it is medium growing, this tree makes a great view in a garden and is unique in colour all year around. The foliage changes from green to bronze and red in the fall.

Botanical Information

FamilySapindaceae (Aceraceae)
GenusAcer
Speciespalmatum
Cultivar'Atropurpureum'
CategoryWoody
TypeTree (deciduous)
OriginC. Wattez Nursery, Woudenberg, The Netherlands (prior to 1910).

Details

USDA Hardiness Zone5
USDA Hardiness Ref.
Canadian Hardiness Zone6
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)20
Temperature (°F)68
Height25 m
Spread12 m
GrowthMedium
Flowering PeriodApril, May

Description and Growing Information

General DescriptionWhat makes the atropurpureum significant is the difference in reddish colour to a more purple colour from other Japanese maples. It thrives with the same amount of sunlight as other Japanese maples but the leaves tend to be greener when in more shade. Makes a great plant for a garden but needs extra watering during drought conditions. Lack of moisture can lead to leaf scorch.
ID CharacteristicPalmate leaves, red to purple colour and has a double terminal bud. The colour of the foliage changes year round from green, red, and brown/bronze shades.
ShapeRound and very dense.
LandscapeThe atropurpureum is used in gardens as a focal point.
PropagationGrafting is used to propagate Acer palmatums. A scion is taken from the plant and grafted to an understock.
CultivationIt usually grows better in moist soils but has to be well drained. Needs partial shade but can grow in full sun. Leaf Scorch may occur when the soil is dry and has lost its moisture.
PestsThis tree may be disease resistant but can get aphids, mites and Borers as well as cottony maple scales.
HabitatHorticultural origin.
Bark/Stem DescriptionSmooth and brittle bark that is easily damaged.
Flower/Leaf Bud DescriptionDouble terminal bud.
Leaf DescriptionPalmate leaves growing oppositely.
Flower DescriptionSmall red clusters of flowers from April to May.
Fruit DescriptionSamara are red in colour, may be 2-3 cm long in length.
Colour DescriptionPurple and red, but foliage becomes greener in shady conditions.
Texture DescriptionMedium texture.

Photographs