Acer rubrum (Red Maple)


Michael's Opinion

A good tree for autumn colour if given the right growing conditions of sufficient moisture and low soil pH. Many cultivars are available that offer a wide range of forms and habits. It is one of the slower growing maples that has a slightly diminutive form when compared to the better known A. saccharum.

Botanical Information

FamilySapindaceae (Aceraceae)
GenusAcer
Speciesrubrum
CategoryWoody
TypeTree (deciduous)
OriginEastern and Central North America.
Ethnobotanical Uses
Disclaimer
Widely used for its timber.
Pronunciation

Details

USDA Hardiness Zone3 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone1a
Canada Hardiness Ref.
RHS Hardiness ZoneH3 - H7
RHS Hardiness Ref.
Temperature (°C)(-40) - (-4)
Temperature (°F)(-40) - 30
Height12 - 18 m
Spread9 - 15 m
GrowthMedium
Flowering PeriodApril

Description and Growing Information

General DescriptionA native tree that is slow growing, and often with a very good autumn colour. This species has been placed on the IUCN Red List as least concern.
ID CharacteristicThree lobed leaves with a silvery underside, a pronounced red in the autumn.
ShapeSomewhat pyramidal in shape.
PropagationSeeds can be germinated from the tree in early summer.
CultivationEasy to cultivate if given adequate moisture although intolerant of soils with a high pH.
PestsNone of note except soil pH can be a problem especially in urban conditions which often result in interveinal chlorosis.
Notable SpecimensThe University of Western Ontario, London, Ontario, Canada. The Cuddy Gardens, Strathroy, Ontario, Canada.
HabitatIn Ontario, Canada it is often found in the near north and around lakes and wet areas.
Bark/Stem DescriptionSmooth, soft grey, very similar to young A. saccharinum.
Flower/Leaf Bud DescriptionBuds are imbricate, 4 mm in length and blunt.
Leaf DescriptionA 3-5 lobed leaf to about 3-10 cm across, with a silver underside.
Fruit DescriptionA 6 cm long samara.
Colour DescriptionExcellent autumn colour, orange-yellow to intense red.
Texture DescriptionMedium textured tree.

Photographs