How to Propagate Japanese water iris 'Ruby King'?
Propagate by division of rhizomes after flowering from midsummer to early autumn every three years

Japanese water iris 'Ruby King' · Iris ensata 'Ruby King'
Grow in moist to wet, deep, humus-rich, acid soil, plant rhizomes 7.5cm deep; it thrives at the margins of ponds or streams, but avoid winter waterlogging
Propagate by division of rhizomes after flowering from midsummer to early autumn every three years