How to Fertilize Iris 'Black Knight'?
Iris bulb nutrient feed biweekly pre-bloom and post flowering fading

Iris 'Black Knight' · Iris 'Black Knight'
Plant rhizomes just above soil level. Thrives in a sunny position, in ideally neutral soil with good drainage. See bearded iris cultivation
Iris bulb nutrient feed biweekly pre-bloom and post flowering fading