How to Fertilize Japanese water iris 'Ol' Man River'?
Balanced iris feed every three weeks in active spring and summer growth

Japanese water iris 'Ol' Man River' · Iris ensata 'Ol' Man River'
Grow in moist to wet, deep, humus-rich, acid soil; it thrives at the margins of ponds or streams
Balanced iris feed every three weeks in active spring and summer growth