How to Prune tall bearded iris 'Benton Susan'?
No pruning required. Cut back faded flower stems after flowering, and remove withered leaves in late winter or early spring

tall bearded iris 'Benton Susan' · Iris 'Benton Susan'
Grow in well-drained, fertile, neutral to slightly acid soil in full sun. Plant rhizomes just above soil level. See bearded iris cultivation
No pruning required. Cut back faded flower stems after flowering, and remove withered leaves in late winter or early spring