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

tall bearded iris 'Cordoba' · Iris 'Cordoba'
Plant in full sun in well-drained soil, and 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