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Trees

Acer palmatum Cascade Emerald ('Sonkoot8')

Japanese maple [Cascade Emerald]

A hardy, vigorous tree to around 3m in height, with a narrowly weeping habit and stems emerging yellow-orange in the spring. Deeply lobed foliage emerges copper-red in spring, changing to bright lime green then darker green in the summer and finally bronze in autumn

Synonyms

Acer palmatum 'Sonkoot8'

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Ultimate height

2.5–4 metres

Time to ultimate height

5–10 years

Ultimate spread

1.5–2.5 metres

Chalk

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 West–facing or North–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, 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: Trade

How to grow

Cultivation

Grow in any moisture-retentive, well-drained soil in a sheltered position. Leaf colour is best in partial shade, although full sun can be tolerated if soil is reliably moist. Leaf scorch can be caused by lack of soil moisture or excessive exposure. See Japanese maples cultivation

Propagation

Propagate by softwood cuttings, layering or by grafting. Plants grown from seed are unlikely to come true, but may still be garden worthy

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Patio and container plants
Architectural

Pruning

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

Pests

May be susceptible to gall mites, aphids, caterpillars and scale insects, including horse chestnut scale

Diseases

May be susceptible to verticillium wilt, leaf scorch and honey fungus

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