How to Prune iris 'Captive Sun'?
Cut down old flower stems after flowering, and remove any dying foliage in autumn

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
Cut down old flower stems after flowering, and remove any dying foliage in autumn