How to Fertilize iris 'Carnaby'?
Diluted iris feed every three to four weeks during spring bloom

iris 'Carnaby' · Iris 'Carnaby'
Plant in full sun in well-drained soil, and with the top surfaces of the rhizomes exposed so that they bake in summer sun, which encourages flowering. See also bearded iris cultivation
Diluted iris feed every three to four weeks during spring bloom