• 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

Pileostegia viburnoides

climbing hydrangea

climbing hydrangea

© RHS 2002

  • Other common names climbing hydrangea

  • Family Hydrangeaceae

  • Genus Pileostegia are evergreen shrubs, climbing by aerial roots, with paired leaves and panicles of small white flowers

  • Details P. viburnoides is a large, self-clinging, slow-growing climber with leathery, narrowly elliptic leaves to 15cm in length. Dense terminal panicles of small, creamy-white flowers

  • Plant range India China Taiwan


  • Foliage Evergreen

  • 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)




  • Full Sun

  • Partial Shade

  • Full Shade

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

  • Exposure Sheltered or Exposed


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained, Well-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral


  • Ultimate height 4-8 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Will grow on a wall facing any aspect so long as it is not very cold and the soil is fertile and well-drained

Propagation Propagate by layering or semi-hardwood cuttings

Suggested planting locations and garden types Wall-side Borders

How to care

Pruning Pruning group 11 in early spring

Pests Generally pest free

Diseases Generally disease free

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