Siberian Irises

Siberian irises are among the easiest to grow in much of North America. They are superb landscape plants, with vertical foliage that makes a nice contrast to other plants in a garden. The foliage is less troubled by bacterial and viral diseases than that of bearded irises. The more widely grown 28-chromosome Siberians grow well in USDA zones 3-7, providing that there is some winter protection (snow or mulch) in the colder areas. The 40-chromosome Siberians often do best in areas with even moisture and without extremes of hot or cold. All Siberians thrive in a medium garden soil, which can be somewhat acid. In a soil that is not extremely dry, they can generally grow well with unsupplemented rainfall after their initial establishment period. Full sun is beneficial to bloom.