How to Propagate dwarf crested iris?
Propagate by division of rhizomes from midsummer to early autumn

dwarf crested iris · Iris cristata
Also known as: lady's calamus
Grow in moist, humus-rich soil in full sun or partial shade. Or grow in a container under glass, keep just moist during dormancy
Propagate by division of rhizomes from midsummer to early autumn