• 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

Styrax japonicus

Japanese snowbell

Japanese snowbell

© RHS 1998

  • Other common names Japanese snowbell
    snowflake flower

  • Family Styracaceae

  • Genus Styrax can be deciduous or evergreen trees or shrubs with simple, alternate leaves and nodding bell-shaped, fragrant white flowers in spring or summer

  • Details S. japonicus is an elegant medium-sized deciduous tree with spreading branches with finely-pointed ovate leaves turning yellow and orange in autumn. Bell-shaped white flowers 15mm in width, with yellow stamens, borne in profusion beneath the branches

  • Plant range Japan & Korea

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Fragrance Flower

  • 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

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Clay

    Clay

  • Sand

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Clay, Sand

  • pHAcid, Neutral

Size

  • Ultimate height 8-12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 20-50 years

How to grow

Cultivation Easy to grow in moist, humus-rich, fertile soils but shelter from cold drying winds

Propagation Propagate from softwood cuttings in summer or propagate by seed sown fresh at 15°C reducing the temperature to 0 to 5°C after 3 months

Suggested planting locations and garden types Low Maintenance

How to care

Pruning Pruning group 1

Pests Generally pest free

Diseases Generally disease free

Advertise here

Did you find the information you were looking for?

RHS members can get exclusive individual advice from the RHS Gardening Advice team.

Join the RHS now

Get involved

We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.