• 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

Lonicera hildebrandiana

giant Burmese honeysuckle

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
giant Burmese honeysuckle

© RHS

  • Other common names giant Burmese honeysuckle
    giant honeysuckle

  • Family Caprifoliaceae

  • Genus Lonicera can be deciduous and evergreen shrubs, or climbers with twining stems. The tubular or two-lipped flowers, often very fragrant, are followed by red or black berries

  • Details L. hildebrandiana is the largest honeysuckle. It is an evergreen climber capable of reaching 10m or more, with flowers and leaves both up to 15cm long. The leaves are dark green and glossy. The highly fragrant, tubular flowers appear in pairs in the leaf axils all summer, opening pale cream and maturing to pale orange. Red berries up to 3cm long follow

  • Plant range SE Asia, China

Characteristics

  • Foliage Evergreen

  • Habit Climbing

  • Fragrance Flower

  • Toxicity The berries may cause mild stomach upset if eaten

  • 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)

    H2

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilLoam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 8-12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation May survive against a warm wall in very mild areas, otherwise grow in a cool greenhouse or conservatory in loam-based compost with bright, filtered light

Propagation Propagate by layering, or take semi-ripe cuttings in summer

Suggested planting locations and garden types Wall-side Borders City & Courtyard Gardens

How to care

Pruning Pruning group 11

Pests Aphids may be a problem

Diseases Generally trouble free

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