• 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 rostrata

beaked yucca

  • Other common names beaked yucca

  • 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. rostrata is a tree yucca up to around 3.5m high, with one or more woody stems, and a sphere of narrow, smooth, spine-tipped, blue-green leaves; they are 60-90cm long but only 1.3-2.5cm wide, and are rigid near the stem but flexible after the widest point, so that they move in even a slight breeze. The flowering stalk is up to 1.5m long with white flowers in summer or autumn

  • Plant range N Mex., S USA

Characteristics

  • Foliage Evergreen

  • Habit Columnar/Upright

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHNeutral, Acid, Alkaline

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in full sun with shelter from cold drying winds and in well-drained soil - it will grow well in open, rich loamy soil but tolerates poorer, sandier soil, and may withstand cold better when grown in poorer soil

Propagation Propagate by seed, sown at 15-18ºC, which may take eight weeks or more to germinate, or propagate by root cuttings in winter

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

How to care

Pruning No pruning required

Pests May be affected by blackfly (black aphids) and snails

Diseases May be affected by yucca leaf spot

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