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Acer palmatum (Dissectum Group) 'Seiryu' AGM

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© RHS 2000

Characteristics

Plant type

Shrub

Habit

Columnar/Upright

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Red in Spring

Foliage

Orange, Red and Yellow in Autumn
Pale Green in Spring and Summer

Size

Ultimate height

2.5-4 metres

Ultimate spread

2.5-4 metres

Time to ultimate height

10-20 years


Preferred common name

Japanese maple 'Seiryu'

Family

Sapindaceae


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

'Seiryū' is a medium-sized deciduous shrub of broadly columnar growth, with light green leaves, the lobes deeply incised; autumn colour orange, yellow and red. Flowers small, red

Synonym(s)

  • Acer palmatum 'Seiryû'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, West-facing or East-facing
  • Sheltered

Cultivation

Grow in a moist but well-drained soil. Water in summer if necessary. Leaf colour is best in partial shade, although full sun can be tolerated. Leaf scorch can be caused by lack of soil moisture or excessive exposure

Soil

  • Moist but well-drained
  • Acid or Neutral
  • Loam, Clay, Sand or Chalk

Propagation

Propagate by grafting or softwood cuttings

Suggested planting locations and garden types

Architectural, City/Courtyard Gardens, Cottage/Informal Garden, Low Maintenance, Patio/Container Plants or Rock Garden


How to care

Pruning

Pruning group 1

Pests

Aphids and horse chestnut scale may be a problem

Diseases

Verticillium wilt sometimes a problem