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Acer palmatum 'Ornatum' (D)
  • RHS AGM

Japanese maple 'Ornatum'

'Ornatum' has a rounded habit with long, thin, lobed leaves that are bronze-red when young, becoming greenish then crimson red in autumn. May eventually reach a height of 3m

Synonyms
Acer palmatum 'Ornatum'
Acer palmatum 'Dissectum Ornatum'

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Size
Ultimate height
2.5–4 metres
Time to ultimate height
5–10 years
Ultimate spread
1–1.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Purple Bronze Red
Summer Bronze Red Green Red
Autumn Red
Winter
Position
  • Full sun
  • Partial shade
Aspect

North–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H6
Botanical details
Family
Sapindaceae
Native to the UK
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

Accepted

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. Suits container cultivation but attention to watering is needed in dry spells during the growing season

Propagation

Propagate by grafting in late winter or softwood cuttings

Suggested planting locations and garden types
  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
Pruning

Pruning group 1 from late autumn to midwinter only

Pests

Aphids and horse chestnut scale may be a problem

Diseases

May be affected by verticillium wilt, acer leaf scorch and honey fungus

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