How to Propagate iris 'Captive Sun'?
Propagate by division of rhizomes after flowering, from midsummer to late summer; for more advice, see dividing irises

iris 'Captive Sun' · Iris 'Captive Sun'
Plant in full sun in well-drained soil, with the top surfaces of the rhizomes exposed so that they get baked in summer sun, which encourages flowering. See also bearded iris cultivation
Propagate by division of rhizomes after flowering, from midsummer to late summer; for more advice, see dividing irises