They are available in shades of blue, purple, wine-red, pink, white and yellow. Siberian irises bloom in late May or June. The foliage of Siberian irises is narrow, upright and grass-like in appearance. The green foliage often turns to an attractive yellow or orange-brown in the fall. Varieties range in height from 12 to 40 inches.
Siberian irises perform best in moist, well-drained, fertile soils.
They do well in partial shade to full sun. In comparison to bearded irises, Siberian irises have fewer insect and disease problems. Also, Siberian irises don't require frequent division. Plants should be divided when the centers of the clumps die. The flower consists of three very large, nearly horizontal falls and three short, spreading standards.