• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Styphnolobium japonicum

Japanese pagoda tree

  • Other common names Japanese pagoda tree

  • Synonyms Sophora japonica

  • Family Fabaceae

  • Genus Styphnolobium are deciduous trees with pinnate leaves and generally white, pea-like flowers born in panicles in summer and autumn

  • Details S. japonicum is a large deciduous tree to 25m tall with a rounded, low-branched habit, and rich green pinnate leaves to 30cm in length. Fragrant creamy-white, pea-shaped flowers 12mm in length, produced in terminal panicles in mature trees

  • Plant range China, Korea

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Fragrance Flower

  • Toxicity Highly toxic if ingested. Wear gloves and wash hands after handling

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or North-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Loam

    Loam

  • Sand

    Sand

  • MoistureWell-drained

  • SoilChalk, Loam, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread wider than 8 metres

  • Time to ultimate height 20-50 years

How to grow

Cultivation Grow in moderately fertile soil in full sun; tolerant of poor soils, drought and pollution. Needs long hot summers to flower well and does not flowers until mature at about 30 years

Propagation Propagate by seed when ripe or grafting in late winter

Suggested planting locations and garden types Low Maintenance Hedging & Screens Coastal

How to care

Pruning Pruning group 1

Pests Generally pest free

Diseases Generally disease free

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