• 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

Hedychium gardnerianum

Kahili ginger

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
  • Other common names Kahili ginger
    Kahli ginger lily

  • Family Zingiberaceae

  • Genus Hedychium are rhizomatous perennials with erect, unbranched stems bearing two ranks of lance-shaped leaves, and dense terminal racemes of showy, often fragrant, trumpet-shaped flowers

  • Details H. gardnerianum is an erect rhizomatous perennial to 2m, with grey-green lance-shaped leaves and cylindrical racemes of fragrant, lemon-yellow flowers with prominent red stamens in late summer and early autumn

  • Plant range Himalaya

Characteristics

  • Foliage Deciduous

  • Habit Suckering

  • 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)

    H2

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1.5-2.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Outdoors, grow in humus-rich, moist but well-drained soil in sun or partial shade. Shelter from cold winds and consider applying a deep mulch of garden compost or leafmould to protect the rhizomes in frost prone areas. In containers or under glass, use a loam-based compost such as John Innes No 3 and grow on in bright indirect light

Propagation Propagate by seed at 21-24°C (70-75°C) as soon as ripe. Divide rhizomes in spring

Suggested planting locations and garden types Flower borders and beds Wall-side Borders City & Courtyard Gardens Coastal Cottage & Informal Garden

How to care

Pruning No pruning required other than cutting back the foliage and old flower spikes at the end of the season

Pests Prone to glasshouse red spider mite and aphids under glass

Diseases Usually trouble free

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