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

iris 'Before the Storm' · Iris 'Before the Storm'
Grow in well-drained, fertile, neutral to slightly acid loam in full sun; sun on the rhizome encourages flowering. See also bearded iris cultivation
Remove any dying foliage in autumn, old flower stems can be cut down after flowering