• 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

Agave macroacantha

large-thorned agave

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
large-thorned agave

© RHS

  • Other common names large-thorned agave

  • Synonyms Agave macroacantha var. latifolia

  • Family Asparagaceae

  • Genus Agave can be perennial or monocarpic succulents, forming rosettes of usually rigid, fleshy, spiny-edged leaves, with funnel-shaped flowers in racemes or panicles often much taller than the rosettes

  • Details A. macroacantha is a clump-forming, evergreen succulent, to 60cm tall and wide, comprising rosettes of narrow, pale blue-green leaves, up to 25cm long, with small brown teeth and a terminal black spine. After at least 15 years, purple-tinged green flowers may be borne on a branched stem up to 2m tall

  • Plant range Mexico

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • 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)

    H1C

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • MoistureWell-drained

  • SoilSand

  • pHAcid, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow under glass in cactus compost in full light. Water freely in summer, giving a low-nitrogen feed three or four times. Water less in autumn and keep dry in winter. Can move outdoors for summer. See cacti and succulent cultivation for further information

Propagation Propagate by seed, or remove offsets

Suggested planting locations and garden types Drought Resistant Low Maintenance Architectural Patio & Container Plants Gravel Garden

How to care

Pruning None required

Pests Prone to scale insects

Diseases Generally trouble free

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