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Herbaceous Perennial

Iris graminea
  • RHS AGM

grass-leaved iris

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

Synonyms
Iris graminea 'Plum Tart'

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Purple White Green
Summer Purple White Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

West–facing or South–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Iridaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
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

Name status

Correct

Plant range
C & S Europe

How to grow

Cultivation

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

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 and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Flower borders and beds
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

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