How to Fertilize iris 'Black Joker'?
Diluted iris bulb feed every three to four weeks spring blooming season

iris 'Black Joker' · Iris 'Black Joker'
Grow in reliably damp soil that is rich in organic matter in a sun or partial shade. Can be grown as a marginal plant in ponds and along streamsides.
Diluted iris bulb feed every three to four weeks spring blooming season