How to Prune Japanese water iris 'Magic Opal'?
Remove any dying foliage in autumn, old flower stems can be cut down after flowering

Japanese water iris 'Magic Opal' · Iris ensata 'Magic Opal'
Grow in moist to wet, deep, humus-rich, acid soil; it thrives at the margins of ponds or streams
Remove any dying foliage in autumn, old flower stems can be cut down after flowering