How to Fertilize Iris 'Apollo'?
Diluted iris feed every three to four weeks during spring bloom

Iris 'Apollo' · Iris 'Apollo'
Thrives in a sunny position, in most soils with good drainage. In drier soils, dig in well-rotted organic matter before planting, and mulch in spring. Feed after flowering to encourage bulb growth. See bulb iris cultivation
Diluted iris feed every three to four weeks during spring bloom