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IRIS sibirica 'Ottawa'
Ottawa Siberian Iris, Siberian Iris
The rich, violet-blue flowers of Siberian iris ‘Ottawa’ are accented with darkly veined, white signals at the base of the falls. The vivid blossoms are especially beautiful when combined with other cool-toned perennials of late spring and early summer, such as peonies, large allium, and catmint.
The parent species of Siberian iris is native from Central Europe through to Russia where it grows in a wide range of conditions from wet water's edge to well drained rocky hillsides. This versatility makes these tough perennials adaptable to a wide range of conditions. Siberian iris produce spectacular flowers in late spring to early summer in varying shades and combinations of blue, white, purple and yellow. The linear, almost grass-like, green foliage of Siberian iris remains fresh and attractive throughout the growing season.
Siberian iris prefer sunny locations and fertile soil with average drainage. The cold-tolerant plants form dense, slowly spreading clumps which should be divided every three years or so. These vigorous perennials look especially impressive planted in masses or as upright accents at the edge of water gardens and pools.
9 - 1
3 - 8
A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23
Full Sun, Partial Sun
36"-48" / 91.4cm - 121.9cm
24"-28" / 61.0cm - 71.1cm
Early Summer, Summer
Eastern Europe, Russia/Siberia
Acidic, Neutral, Alkaline
Clay, Loam, Sand
Wet Site, Drought
White, Purple, Blue Violet
Green, Dark Green
Cutflower, Feature Plant, Foundation, Mixed Border
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