• 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 titanota

chalk 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
chalk agave

© RHS

  • Other common names chalk agave

  • 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. titanota is a medium-sized, evergreen, succulent plant, which forms a solitary rosette when young, but may produce offsets when mature. Leaves have ferocious-looking, curved and twisting light-brown, marginal spines, the bases of which often fuse along the leaf margins. There is also a long twisting spine at the leaf-tip. The plant is monocarpic and dies after flowering and setting seed. The flowers are yellow and are produced on a spike 3-6m in height

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

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Under glass grow in a sharply-draining loam-based compost (JI No2) with extra perlite or sharp sand, or a proprietary cactus compost in full sunlight. Water freely during the growing season from spring to autumn but allowing the compost to dry out before watering again. Water more sparingly in winter when the plant is dormant

Propagation Propagate by seed in spring at 21°C or from offsets in summer

Suggested planting locations and garden types Patio & Container Plants Sub-tropical

How to care

Pruning None required

Pests scale insect and mealybugs can be a problem under glass

Diseases Generally trouble free except in wet or poorly drained soil when it could be susceptible to root rot

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