How to Propagate iris 'Berlin Tiger'?
Propagate by dividing irises from mid-summer to early autumn. See dividing irises

iris 'Berlin Tiger' · Iris 'Berlin Tiger'
Grow in moist to wet, deep, humus-rich, acid soil; thrives at the margins of ponds or streams
Propagate by dividing irises from mid-summer to early autumn. See dividing irises