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Trees

Acer wilsonii

Wilson's maple

A spreading tree up to 15m tall. The broad, three to five lobed leaves open with a hint of bronze in the spring and mature to a dark green, to then put on a cheerful autumn display of yellow. Hanging clusters of small, red and white flowers appear in April followed by green and pink, two-winged fruit in October

Synonyms

Acer campbellii subsp. wilsonii
Acer angustilobum

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Ultimate height

Higher than 12 metres

Time to ultimate height

20–50 years

Ultimate spread

4–8 metres

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or South–facing or West–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Sapindaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Bushy, Spreading branched
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
Plant range: SW China

How to grow

Cultivation

Grow in a sheltered location in fertile, moist but well-drained soil in sun or partial shade. See Acer cultivation for further advice

Propagation

Propagate by seed (trees and shrubs), layering in autumn, grafting in late winter or softwood cuttings in early summer

Suggested planting locations and garden types

Cottage and informal garden
Flower borders and beds

Pruning

Pruning group 1 if necessary, from late autumn to midwinter only

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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