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Iris ensata 'Rose Queen' AGM

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© RHS 1999

Characteristics

Plant type

Bog or Herbaceous Perennial

Habit

Clump-forming

Toxicity

Ingestion may cause severe discomfort

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Pale Pink and Dark Purple in Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

Japanese water iris 'Rose Queen'

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

'Rose Queen' is a clump-forming herbaceous perennial to 1m with narrow, green, drooping foliage and small, pale lilac-pink flowers, the falls deep mauve towards the base

Synonym(s)

  • Iris laevigata 'Rose Queen'
  • Iris 'Rose Queen'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

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

Cultivation

Grow in moist, deep, acid, humus-rich soil in full sun or partial shade

Soil

  • Poorly-drained
  • Acid
  • Loam

Propagation

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

Suggested planting locations and garden types

Cottage/Informal Garden or Flower borders and beds


How to care

Pruning

Cut back after flowering

Pests

Slugs and snails may be a problem, sawflies can damage the leaves

Diseases

May be affected by aphid borne virus diseases, iris rhizome rot and grey moulds