How to Propagate tall bearded iris 'Benton Primrose'?
Propagate by division of rhizomes after flowering, from midsummer to late summer; for more advice, see dividing irises

tall bearded iris 'Benton Primrose' · Iris 'Benton Primrose'
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
Propagate by division of rhizomes after flowering, from midsummer to late summer; for more advice, see dividing irises