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ACER macrophyllum
Commonly known as Big leaf maple, Oregon maple
Large dark green deeply lobed leaves which turn a bright orange in autumn. Fragrant yellow flowers in clusters followed by bristly fruit
Further Reading....
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DeciduousBroadly ovate, deeply 5-lobed, glossy leaves 20-30cm (8-12in) long
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YellowYellow-green -
Height20m (65ft) -
Spread20m (65ft)
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TreeVigorous. Produces large, bristly, winged fruit
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Very hardyHardy in the severest continental climates including exposed upland locations in the UK. Plant can withstand temperatures < -20 (-4°F) -
Full sun -
Partial shade
ACER macrophyllum
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Additional Features
Good to knowThe largest leaves of any maple
Pests & DiseasesAphids, mites (causing galls), caterpillars, Verticillium wilt, leaf scorch, honey fungus
Place of originWestern North America -
Flower ShapeRacemesPendent racemes 10-15cm (4-6in) long
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Garden Location/ConditionsWoodland garden
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HardinessFully hardy
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Leaf margin
Lobed(see photos above) -
Leaf shape
Ovate
(see photos above) -
Pruning group
Pruning group 1Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.
RHS group 1 -
Seasonal InterestAutumnSpring
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Soil ConditionsFertile moist well-drained soil
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Tree ShapeRounded to broadly spreading
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Acers - Care Guide
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20m (65ft)
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20m (65ft) |
Useful extras...
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00
Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50
Vermin & Pest Control
Tree Guards
Essential small tree protection from vermin and strimming. This pack includes 5 x 90cm canes and 5 x 90cm spiral guards. Includes instructions.
Only £5.00
Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.20
Garden Goodies
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots.
Comes with chalk pen. Pack of 5
Only £10.20
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