How to Prune iris 'Gull's Wing'?
Cut down old flower stems after flowering, and remove any dying foliage in autumn

iris 'Gull's Wing' · Iris 'Gull's Wing'
Plant in any good garden soil that is moist but well-drained (not waterlogged); improve dry soils by digging in well-rotted organic matter and apply as a mulch each spring
Cut down old flower stems after flowering, and remove any dying foliage in autumn