How to Propagate Siberian flag?
Propagate by seed or by division of rhizomes from midsummer to early autumn
Siberian flag · Iris sibirica
Also known as: Siberian iris
Grow in any good garden soil that is preferably moist but not waterlogged. In drier soils, dig in well-rotted organic matter before planting then apply as a mulch each spring
Propagate by seed or by division of rhizomes from midsummer to early autumn