How to Fertilize tall bearded iris 'Cordoba'?
Low nitrogen feed in spring before and after bloom

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
Low nitrogen feed in spring before and after bloom