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Iris xiphium

Spanish iris

A vigorous, clump-forming, bulbous perennial with lance-shaped leaves. In late spring to early summer each bulb produces two flowers, usually pale to deep blue or violet, occasionally white or yellow, with an orange or yellow mark on each fall

Other common names
clouded iris
Dutch iris
see moresmall bulbous iris
Spanish flag
thunderbolt iris

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0–0.1 metre
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Yellow Green
Summer Blue Yellow Green
Autumn
Winter
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical details
Family
Iridaceae
Native to the UK
No
Foliage
Deciduous
Habit
Columnar upright
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling
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
W & C Mediterranean

How to grow

Cultivation

Grow in well-drained neutral or slightly alkaline soil

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
  • Coastal
  • City and courtyard gardens
  • Cottage and informal garden
  • Cut flowers
  • Flower borders and beds
Pruning

Remove the foliage once it has died down

Pests

May be susceptible to slugs, snails and thrips

Diseases

May be susceptible to aphid-borne viruses, bacterial soft rot and grey moulds; see Iris diseases

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