• AGM plants

    AGM plants have been through a rigourous 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 unguicularis

Algerian iris

Algerian iris

© � RHS 2003

  • Other common names Algerian iris
    Algerian winter iris

    Winter iris

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  • Synonyms Iris stylosa

  • Genus Iris may be rhizomatous or bulbous perennials, with narrowly 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

  • Family Iridaceae / Iridaceae

  • Species I. unguicularis is a vigorous evergreen rhizomatous perennial to 30cm in height, with copious dark green leaves and very fragrant, deep violet flowers 5-8cm in width, the falls marked with white and deep yellow at the base, in late winter

  • Plant range N Africa to SW Asia

Characteristics

  • Foliage Evergreen

  • Habit Clump-forming

  • Fragrance Flower

  • Toxicity Ingestion may cause severe discomfort

Colour

Sunlight

  • Full Sun

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Clay

  • Chalk

    Loam

  • Chalk

    Sand

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilClay, Loam, Sand, Chalk

  • pHAlkaline, Neutral

Size

  • Ultimate height

    0.1-0.5 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grow in well-drained or sharply drained neutral or slightly alkaline soil. Ideal at the base of a sunny wall

Propagation Propagate by division from midsummer to early autumn, plant immediately in flowering positions

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

How to care

Pruning Cut back after flowering

Pests Slugs and snails may be a problem

Diseases May be subject to bacterial soft rot, grey moulds and a virus

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