How to Prune sword lily 'Atom'?
Remove spent flower stems and allow foliage to die down naturally

sword lily 'Atom' · Gladiolus 'Atom'
Grow in fertile, well-drained soil in full sun. Plant corms 10-16cm deep in spring. If the soil is not perfectly-drained, plant the corms on a bed of sand. Provide a winter mulch in cold areas
Remove spent flower stems and allow foliage to die down naturally