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Iris ensata

Japanese water iris

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Key information

Plant type

Hardy perennial

Flower colour






Skill level


photo by FhF Greenmedia, copyright GAP Photos (35275)

Plant details

The huge flat flowers of this beautiful iris are among the biggest of all. But you need to select named varieties, which often have Japanese names. Raised from seed plants have smaller, more elegant flowers. Crowns must not be submerged in winter.

Family: Iridaceae

Genus: Iris

Species: ensata

Plant type: Hardy perennial

Flower colour: Mixed

Foliage colour: Mid-green

Feature: Flowers

Sun exposure: Full sun, Partial shade

Soil: Moist, Boggy, Sandy

Hardiness: Hardy

Skill level: Beginner

Height: 90cm

Spread: 30cm

Time to plant seeds: October to March

Time to divide plants: October to March

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