How to Fertilize iris 'Benton Berenice'?
Feed low-nitrogen bloom fertilizer biweekly pre and post flowering

iris 'Benton Berenice' · Iris 'Benton Berenice'
Grow in well-drained, fertile, neutral to slightly alkaline loam in full sun, with upper part of rhizomes exposed at soil level and not overshadowed, rotate every 5-6 years. See bearded iris cultivation
Feed low-nitrogen bloom fertilizer biweekly pre and post flowering