• 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

Campsis grandiflora

Chinese trumpet creeper

  • Other common names Chinese trumpet creeper
    Chinese trumpet vine

  • Synonyms Bignonia chinensis
    Bignonia grandiflora

    Campsis chinensis

    see more
  • Family Bignoniaceae

  • Genus Campsis are fast-growing deciduous climbers clinging by aerial roots, pinnate leaves and clusters of tubular-funnel-shaped flowers in late summer or early autumn

  • Details

    C. grandiflora is a vigorous climber with mid- to dark green leaves comprising seven to nine leaflets. From late summer to autumn produces terminal clusters of dark orange to red, trumpet-shaped flowers

  • Plant range Japan, China

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)

    H4

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Clay

    Clay

  • Sand

    Sand

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 8-12 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation A climber that despite its exotic-looking flowers is reasonably hardy if grown against a warm, sunny wall. Produces relatively few aerial roots, so likely to need tying in regularly. See campsis cultivation

Propagation Propagate by seed sown in containers in a cold frame in autumn, or by layering, hardwood cuttings or root cuttings

Suggested planting locations and garden types Wall-side Borders Mediterranean Climate Plants Sub-tropical

How to care

Pruning Pruning group 12 in late winter or early spring

Pests May be affected by aphids or scale insects

Diseases May be affected by powdery mildews

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.