How to Fertilize iris 'Superstition'?
Diluted iris bulb feed every three to four weeks spring blooming season

iris 'Superstition' · Iris 'Superstition'
Grow in well-drained, fertile, neutral to slightly acidic soil in full sun. Do not cover the rhizomes with mulch or allow other plants to shade them as sun on the rhizomes encourages flowering. For further information see bearded iris cultivation
Diluted iris bulb feed every three to four weeks spring blooming season