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Iris ensata var. spontanea (Japanese Water Iris)

Japanese Water Iris, Iris kaempferi var. spontanea

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Iris ensata var. spontanea (Japanese Water Iris) is a clump-forming perennial with large, bright purple flowers adorned with a delicate yellow stripe on the falls. Elegantly rising to 36 in. (90 cm), this Japanese Water Iris blooms in early to mid-summer. After blooming, the sword-like foliage, consisting of erect, narrow leaves is also one of its most attractive garden features. Great for bog gardens, pond margins, or moisture-retentive soil.

  • Easy to grow, this Japanese Water Iris performs best in full sun to part shade, in humus-rich, moist to wet, acidic soils. It loves moisture-retentive soils and thrives in standing water, up to 6 in. deep (15 cm), during the growing season.
  • A welcomed addition to water gardens, Japanese gardens, along pools or streams. Most spectacular when planted in large groupings where it develops a bouquet effect.
  • No serious insect or disease problems. Watch for slugs and snails.
  • Propagate by division of rhizomes from midsummer to early autumn. Remove any dying foliage in the fall. Old flower stems may be cut down after flowering.
  • All parts may cause discomfort if ingested. Wear gloves and other protective equipment when handling.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • Native to Japan.

Irises: How to Grow and Care with Success


Want to learn how to grow and care for irises like a pro? Follow these simple steps and enjoy the beauty of these striking plants

Requirements

Hardiness 6 - 9
Plant Type Perennials
Plant Family Iridaceae
Genus Iris ensata
Common names Japanese Flag, Japanese Iris, Iris
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early, Mid)
Height 2' - 3'
(60cm - 90cm)
Spread 1' - 3'
(30cm - 90cm)
Spacing 18" - 36"
(50cm - 90cm)
Depth 2" (5cm)
Maintenance Low
Water Needs High
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moisture Retentive, Poorly Drained
Characteristics Cut Flowers, Showy
Tolerance Wet Soil, Rabbit
Attracts Butterflies, Bees
Garden Uses Beds And Borders, Bog Gardens, Patio And Containers, Ponds And Streams, Rain Gardens, Wall-Side Borders, Water Gardens
Garden Styles Coastal Garden, Informal and Cottage, City and Courtyard
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Alternative Plants to Consider

Iris pseudata ‘Tsukiyono’
Iris pseudata ‘Yarai’
Iris pseudata ‘Shiryukyo’
Iris ensata ‘Flashing Koi’ (Japanese Iris)
Iris ensata ‘Lion King’ (Japanese Iris)
Iris ensata ‘Crystal Halo’ (Japanese Iris)

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Iris ensata (Japanese Iris)
Irises: How to Grow and Care with Success
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 6 - 9
Plant Type Perennials
Plant Family Iridaceae
Genus Iris ensata
Common names Japanese Flag, Japanese Iris, Iris
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early, Mid)
Height 2' - 3'
(60cm - 90cm)
Spread 1' - 3'
(30cm - 90cm)
Spacing 18" - 36"
(50cm - 90cm)
Depth 2" (5cm)
Maintenance Low
Water Needs High
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moisture Retentive, Poorly Drained
Characteristics Cut Flowers, Showy
Tolerance Wet Soil, Rabbit
Attracts Butterflies, Bees
Garden Uses Beds And Borders, Bog Gardens, Patio And Containers, Ponds And Streams, Rain Gardens, Wall-Side Borders, Water Gardens
Garden Styles Coastal Garden, Informal and Cottage, City and Courtyard
How Many Plants
Do I Need?
Not sure which Iris ensata (Japanese Iris) to pick?
Compare Now

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