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Iris graminea AGM

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© RHS 1999

Characteristics

Plant type

Herbaceous Perennial

Habit

Bushy

Fragrance

Flower

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Purple and White in Spring and Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

grass-leaved 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. graminea is a rhizomatous iris 30-40cm tall, with narrow, bright green leaves and plum-scented, reddish-purple flowers 8cm wide, the falls white, strongly veined with violet</p>

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

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

Cultivation

Grow in well-drained neutral to slightly acid loam in full sun or part shade

Soil

  • Moist but well-drained
  • Acid or Neutral
  • Sand, Clay or Loam

Propagation

Divide in spring or late summer. Propagate by seed as soon as it is ripe and overwinter in a coldframe

Suggested planting locations and garden types

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


How to care

Pruning

Remove any dying foliage in autumn, old flower stems can be cut down after flowering

Pests

May be attacked by slugs, snails and thrips

Diseases

May be subject to grey moulds