Acer japonicum 'Green Cascade'

RHS Plant Profile

downy Japanese maple 'Green Cascade'

Synonyms

Acer palmatum 'Green Cascade'

Trees

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A deciduous large shrub or small tree, with a cascading, weeping habit and rounded, deeply cut, 9-11 lobed rich green leaves to 10cm long, brilliantly coloured red, orange and yellow in autumn. Bears long stalked clusters of red-purple flowers in spring as the leaves open, followed by brownish-red winged fruits

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand, Chalk

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity: 10–20 years
Max Spread: 2.5-4 metres
Max Height: 2.5-4 metres

Growing Conditions

Clay Loam Sand Chalk

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or North–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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Sapindaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Pendulous weeping
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: Accepted

How to Grow

Cultivation

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

Propagation

Propagate by layering in autumn, grafting in late winter or softwood cuttings in early summer

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden

Pruning

Pruning group 1, if necessary, from late autumn to midwinter only. Train leading shoot vertically when young to obtain a weeping habit

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