• 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

Allium aflatunense B. Fedtsch.

© RHS

  • Family Alliaceae

  • Genus Allium are bulbous herbaceous perennials with a strong onion or garlic scent, linear, strap-shaped or cylindrical basal leaves and star-shaped or bell-shaped flowers in an umbel on a leafless stem

  • Details A. aflatunense, as described by B. Fedtsch, is a bulbous perennial with slightly ribbed stems and linear, mid-green basal leaves, 30-60cm long. Dense umbels, 10cm across, of star-shaped purplish-pink flowers appear in summer to 1m high

  • Plant range C Asia

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

  • 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 Exposed or Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0-0.1 metre

  • Time to ultimate height 1-2 years

How to grow

Cultivation Grow in fertile, well-drained soil in full sun

Propagation Propagate by seed in containers in a cold frame, when ripe or in spring; propagate by removing offsets in autumn

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

How to care

Pruning Tidy as leaves fade, remove seedheads if self-seeding not needed

Pests May be affected by allium leaf mining flies

Diseases Susceptible to onion white rot and downy mildews

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