How to Prune Lazistan iris?
Remove any dying foliage in autumn, old flower stems can be cut down after flowering

Lazistan iris · Iris lazica
Grow in sharply-drained, neutral to alkaline soil in full sun; ideal for the base of a sunny wall where ground is dry and stony but tolerant of some moisture and shade
Remove any dying foliage in autumn, old flower stems can be cut down after flowering