• 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

Iris foetidissima

stinking iris

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
stinking iris

© RHS 2002

  • Other common names stinking iris
    blue seggin

    gladden
    gladdon
    gladwin
    gladwyn
    roast beef plant
    scarlet-seeded iris
    stinking gladwin
    stinking gladwyn

    see more
  • Family Iridaceae

  • Genus Iris may be rhizomatous or bulbous perennials, with narrow leaves and erect stems bearing flowers with 3 large spreading or pendent fall petals, alternating with 3 erect, often smaller, standard petals, in late winter, spring or early summer

  • Details I. foetidissima is an evergreen perennial to 80cm, with glossy rich green leaves and small, yellow-tinged, dull purple flowers followed by large pods opening to show bright orange-red seeds, which persist into winter

  • Plant range Europe, N Africa

Characteristics

  • Foliage Evergreen

  • Habit Clump-forming

  • Toxicity Ingestion may cause severe discomfort

  • 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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Full Shade

  • Aspect South-facing or East-facing or West-facing or North-facing

  • Exposure Exposed or Sheltered

Soil

  • Clay

    Clay

  • Loam

    Loam

  • Chalk

    Chalk

  • Sand

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilClay, Loam, Chalk, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in well-drained, neutral to slightly acid loam but will tolerate most soils in full sun, partial shade or shade

Propagation Propagate by seed sown in pots in a cold frame in autumn or spring. Propagate by division of rhizomes from midsummer to early autumn

Suggested planting locations and garden types Flower borders and beds Underplanting of Roses and Shrubs Low Maintenance Cottage & Informal Garden Wildlife Gardens

How to care

Pruning Remove any dying foliage in autumn

Pests Prone to slugs, snails and thrips

Diseases May be affected by grey moulds

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