Sorbus discolor misapplied

RHS Plant Profile
Japanese rowan

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Japanese rowan RHS

Synonyms

Sorbus americana subsp. japonica, Sorbus aucuparia 'Cooixta', Sorbus commixta 'Nanakamado', Sorbus discolor misapplied, Sorbus matsumurana misapplied, Sorbus randaiensis misapplied, Sorbus reflexipetala misapplied, Sorbus wilfordii

Trees
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A compact, broadly conical tree with erect branches and dark green, ash-like leaves that go yellow then red or purple in autumn. Creamy-white spring flowers in heads up to 15cm across are followed by clusters of red or orange-red berries

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Max Height

8-12 metres

Max Spread

4-8 metres

Size

Time to Maturity
20–50 years
Max Spread
4-8 metres
Max Height
8-12 metres

Growing Conditions

Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Neutral

Position

Full sun Partial shade
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or 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
Rosaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Fruit are ornamental; not to be eaten. Wear gloves and other protective equipment when handling. Pets: Fruit are ornamental; not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Sorbus can be deciduous trees or shrubs with simple or pinnate leaves and clusters of small white or pink flowers, followed by white, yellow, pink, red or brown berries; some have fine autumn colour
Name Status
Synonym
Plant Range
E Asia

How to Grow

Cultivation

Prefers moist but well-drained acid or neutral soil in full sun or light dappled shade

Propagation

Propagate by seed sown in containers in a cold frame in autumn, taking semi-ripe cuttings in early summer, Chip budding in summer or grafting in winter

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildlife gardens
  • City and courtyard gardens

Pruning

pruning group 1

Pests

May be susceptible to aphids, scale insects, pear blister mite, red spider mite and sawfly larvae

Diseases

May be susceptible to fireblight, apple canker, silver leaf and honey fungus