• 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

Crinum × powellii

swamp lily

  • Other common names swamp lily

  • Synonyms Crinum × powellii pink
    Crinum × powellii 'Roseum'

  • Family Amaryllidaceae

  • Genus Crinum are bulbous perennials, sometimes evergreen, with umbels of showy, fragrant, funnel-shaped flowers held well above the strap-shaped leaves

  • Details C. × powellii is a bulbous perennial forming a tuft of strap-shaped, bright green leaves, with umbels of fragrant, trumpet-shaped light pink flowers to 12cm in width, on stems to 1.5m, from late summer

Characteristics

  • Foliage Deciduous

  • Habit Tufted

  • Fragrance Flower

  • Toxicity Ingestion may cause mild stomach upset

  • 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)

    H5

Colour

Sunlight

  • Full Sun

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

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Sand

    Sand

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilChalk, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in moist but well-drained, deep, humus-rich, fertile soil. Intolerant of waterlogging and may need some protection from frosts in colder areas. Keep neck of the bulb just proud of the soil

Propagation Propagate by seed sown in containers with bottom heat when ripe or by offsets in spring

Suggested planting locations and garden types Flower borders and beds Wall-side Borders Cottage & Informal Garden Patio & Container Plants Architectural City & Courtyard Gardens Coastal Gravel Garden Mediterranean Climate Plants Sub-tropical

How to care

Pruning No pruning required

Pests Generally pest free but slugs and snails may attack young growth

Diseases Generally disease free

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