• 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 'Cocktail Tropical' (TB)

iris 'Cocktail Tropical'

© RHS
  • Other common names iris 'Cocktail Tropical'

  • 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

  • Horticultural Group Tall Bearded irises are herbaceous rhizomatous perennials to 70cm or more, with flowers 10-20cm across, bearded on the falls, in late spring and early summer

  • Details 'Cocktail Tropical' is a rhizomatous, clump-forming perennial to 90cm tall with sword-shaped, grey-green foliage. Eight to ten blooms per stem are borne in summer each with light apricot-coloured standards, an orange beard and purple-violet falls held nearly horizontal

Characteristics

  • Foliage Deciduous

  • Habit Tufted

  • 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)

    H7

Colour

Sunlight

  • Full Sun

  • Aspect South-facing

  • Exposure Exposed or Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Loam

  • pHAcid, 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, fertile, neutral to slightly acid soil in full sun; sun on the rhizomes will help to encourage flowering. See also bearded iris cultivation

Propagation Propagate by division of rhizomes from midsummer to early autumn; see dividing irises

Suggested planting locations and garden types Drought Resistant Cut Flowers Flower borders and beds Cottage & Informal Garden City & Courtyard Gardens

How to care

Pruning Remove any dying foliage in autumn, old flower stems can be cut down after flowering. Tall cultivars can have their leaf fans trimmed to one third of the total height to reduce wind rock while the plants are establishing

Pests May be affected by iris sawfly, aphids, leaf miners, slugs, snails, and wireworms

Diseases May be affected by iris rhizome rot, iris leaf spot, scorch, a rust, and virus diseases; for more advice see iris diseases

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