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Iris latifolia

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© RHS

Characteristics

Plant type

Bulb

Habit

Bushy

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

Blue and White in Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0-0.1 metre

Time to ultimate height

2-5 years


Preferred common name

English iris

Family

Iridaceae


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

<p>I. latifolia is a bulbous perennial to 60cm tall, with erect, narrowly lance-shaped leaves and violet, violet-blue or white flowers 8-10cm wide, each fall whitish at the base</p>

Other common names

  • English iris
  • great bulbous iris
  • Pyrenean flag

Synonym(s)

  • Iris xiphioides

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Exposed or Sheltered

Cultivation

Grow in well-drained neutral or slightly alkaline soil. May be naturalised in grass

Soil

  • Moist but well-drained
  • Alkaline or Neutral
  • Sand, Loam or Chalk

Propagation

Lift and propagate by division in early autumn. Propagate by seed; sow seeds in cold frame in spring or autumn

Suggested planting locations and garden types

City/Courtyard Gardens, Coastal, Cottage/Informal Garden or Flower borders and beds


How to care

Pruning

Remove the foliage once it has died down

Pests

May be attacked by slugs and snails

Diseases

May be subject to grey moulds and iink disease (iris diseases)