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Acer macrophyllum

Oregon maple

A large, round-headed tree with deeply-lobed, dark green leaves up to 30cm across that turn shades of orange and yellow in autumn. Small, fragrant, yellowish-green flowers are borne in drooping clusters 10-20cm long in spring and followed by bristly, winged fruit

Other common names
big leaf maple
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Size
Ultimate height
Higher than 12 metres
Time to ultimate height
20–50 years
Ultimate spread
Wider than 8 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Yellow Green Green
Summer Green
Autumn Yellow Orange
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or North–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Sapindaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus

Acer can be deciduous trees or large shrubs with paired, often palmately-lobed leaves and small flowers followed by characteristic winged fruits. Many have fine autumn colour, and some have ornamental stems

Name status

Correct

How to grow

Cultivation

Grows best in a moist but well-drained soil in full sun or partial shade but will tolerate a wide range of conditions

Propagation

Propagate by seed

Suggested planting locations and garden types
  • Low Maintenance
Pruning

Pruning group 1

Pests

May be susceptible to Acer gall mite, aphids, caterpillars and horse chestnut scale

Diseases

May be susceptible to Verticillium wilt, Acer leaf scorch and honey fungus

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