Alphabetical Plant Listing

Iris sibirica (Siberian Iris)

Siberian Iris, Siberian Flag (Iris Sibirica)


Siberian Irises (Iris sibirica) are terrific herbaceous perennials, rich with many qualities: fabulous looking, long display season, easy to grow, low maintenance and trouble free!

  • Their exquisite flowers come in an array of gorgeous blue, purple, red-violet or yellow with newer cultivars in brown and orange shades, and can have a variety of forms from upright to flat and round. After blooming, their grass-like foliage consisting of sturdy clumps of upright green, narrow and fairly rigid, blade-shaped leaves, is also one of their most attractive garden features as it remains fresh-looking all season.
  • They are most spectacular in large groupings where they develop a bouquet effect and grow to a height of 2 to 4 feet, although some dwarf varieties are also available.
  • They tend to bloom from late spring to early summer, earlier than the Japanese Irises (Iris ensata) and slightly later than the Tall Bearded Irises.
  • Easy to grow, they perform best in full sun or part shade, in average, medium to wet soils. Shade is tolerated, but the flowering performance may be altered. While Siberian Irises enjoy a wide range of soils, slightly acidic soil is where these perennial plants will thrive. They are drought tolerant, even though they prefer adequate moisture.
  • Deer and rabbit resistant

Guide Information

Hardiness 3 - 8
Heat Zones 1 - 9
Climate Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 1A, 1B, 2A, 2B, 3A, 3B
Plant Type Perennials
Plant Family Iris Sibirica - Siberian Irises
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' - 4' (60cm - 120cm)
Spread 1' - 2' (30cm - 60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Clay Soil, Deer, Drought, Rabbit, Wet Soil
Attracts Butterflies
Landscaping Ideas Beds and Borders, Ponds and Streams
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage

gerduess / 123RF Stock Photo

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.

Guide Information

Hardiness 3 - 8
Heat Zones 1 - 9
Climate Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 1A, 1B, 2A, 2B, 3A, 3B
Plant Type Perennials
Plant Family Iris Sibirica - Siberian Irises
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' - 4' (60cm - 120cm)
Spread 1' - 2' (30cm - 60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Clay Soil, Deer, Drought, Rabbit, Wet Soil
Attracts Butterflies
Landscaping Ideas Beds and Borders, Ponds and Streams
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage
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