• 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

Yucca filamentosa

Adam's needle and thread

  • Other common names Adam's needle and thread
    Carolina silk grass

    needle palm
    Our Lord's candle
    spoonleaf yucca
    thready Adam's needle

    see more
  • Family Asparagaceae

  • Genus Yucca can be evergreen perennials, shrubs or trees, with dense or loose rosettes of stiff, sword-shaped leaves and tall panicles of bell-shaped flowers

  • Details Y. filamentosa is a small stemless evergreen shrub forming clumps of sword-shaped, deep green leaves to 75cm in length, edged with curly filaments. Nodding creamy-white flowers 6cm in length are borne in panicles to 2m in height in late summer

  • Plant range USA

Characteristics

  • Foliage Evergreen

  • Habit Clump-forming

  • 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 East-facing

  • Exposure Sheltered or Exposed

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow outdoors in any well-drained soil in full sun. Flowers may require hand-pollination to set seed. Remove spent flowering stems

Propagation Propagate by seed or remove rooted suckers

Suggested planting locations and garden types Flower borders and beds Architectural City & Courtyard Gardens Coastal Cottage & Informal Garden Mediterranean Climate Plants

How to care

Pruning No pruning required

Pests May be attacked by aphids on flower spikes

Diseases May be subject to a leaf spot

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