• 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

Celastrus orbiculatus

oriental bittersweet

oriental bittersweet

© RHS

  • Other common names oriental bittersweet
    staff vine

  • Synonyms Celastrus articulatus

  • Family Celastraceae

  • Genus Celastrus are fast-growing deciduous, rarely evergreen, climbers with scandent or twining stems bearing alternate leaves and inconspicuous greenish flowers followed by attractive fruits. Male and female flowers are often borne on separate plants

  • Details C.orbiculatus is a strong-growing deciduous climber with rounded leaves, colouring butter-yellow in autumn, and inconspicuous greenish flowers followed by yellow fruits which may split to show scarlet seeds. A hermaphrodite form is available, so fruit can appear from a single plant. This is a large species, growing as a twining vine, sometimes to more than 12m

  • Plant range NE Asia

Characteristics

  • Foliage Deciduous

  • Habit Climbing

  • 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

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 8-12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grows best in well-drained soil in full sun, but will tolerate partial shade. To ensure fruit production, plant a male and a female together. Can be grown up large trees of at least 10m in height. Strong supports are needed for this vigorous species

Propagation Propagate by seed in containers in an open frame as soon as ripe, or in spring as soon as ripe, or in spring. Root cuttings in winter or semi-ripe cuttings in summer

Suggested planting locations and garden types Wall-side Borders

How to care

Pruning Pruning group 11 in spring or winter

Pests Generally trouble free

Diseases Generally trouble free

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