Acer x freemanii 'Morgan ' (Morgan Maple)


Michael's Opinion

Acer x freemanii ‘Morgan’ also known as Indian Summer is a hybrid cross between two native North American trees; Acer saccharinum and Acer rubrum. Acer saccharinum gives 'Morgan' the ability to grow fast and adapt to different climate and soil conditions. The Acer rubrum parentage allows it to grow in dry to wet areas and tolerate some standing water, this parentage also provides the intense autumnal foliage that it is well known for. Its upright oval shape and height makes this the perfect shade tree.

Botanical Information

FamilySapindaceae (Aceraceae)
GenusAcer
Speciesx freemanii
Cultivar'Morgan '
SynonymsAcer x freemanii 'Indian Summer'
CategoryWoody
TypeTree (deciduous)
OriginA hybrid cross of A. saccharinum and A. rubrum from the Morgan Arboreteum, MacDonald College, Quebec, Canada.

Details

USDA Hardiness Zone4a - 8a
USDA Hardiness Ref.
Canadian Hardiness Zone4 - 8
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-34 - (-12)
Temperature (°F)-20 - 20
Height18 - 24 m
Spread10 - 15 m
GrowthFast
Flowering PeriodMay

Description and Growing Information

General DescriptionAn extremely dynamic cultivar that is fast growing, adaptable and with very bright, intense red autumn colour.
ShapePyramidal when young to upright-oval when mature.
LandscapeIt may be used as a shade tree either singularly or in groups but must be given room to grow since it is a large specimen. Since it is quite adaptable it will find use in urban situations such as shopping malls and parking lots. Brilliant autumn colour can be realized to full affect if planted in loosely spaced avenues or rows.
PropagationSoftwood cuttings under mist root well and avoid the potential incompatibility issues with grafting.
CultivationPlant in full sun to most soil types, it is tolerant to urban pollution but is intolerant to high pH. Graft incompatibility may occur where it is not grown on its own roots (softwood cuttings). It has a shallow root system and thus many surface roots lead to some instability in drought and possible understory cultivation issues.
PestsLeaf hoppers can become an issue.
Notable SpecimensThe Royal Botanical Gardens, Burlington, Ontario, Canada.
HabitatHorticultural origin.
Bark/Stem DescriptionWrinkly grey bark with brick red colour young branchlets.
Flower/Leaf Bud DescriptionSmall rounded buds, 3 mm - 1 cm in size.
Leaf Description3 - 5 lobed leaf blades, 10 cm across, green abaxil and grey adaxil during the summer. Orange-red to red during autumn.
Flower DescriptionPistillate, red flowers bloom before the leaves develop in early spring.
Fruit DescriptionThe fruit is a samara, 2-5 cm, red, not ornamentally significant, maturing from May to June.
Colour DescriptionGreen foliage during the summer which will later become intense, uniform red in the autumn creating a spectacular show. The grey bark becomes slightly wrinkled with age while the branchlets are a brick red colour.
Texture DescriptionA medium textured plant in all seasons.

Photographs