How to Prune Iris 'Apollo'?
Remove spent flower stems in summer, and any dying foliage in autumn

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
Remove spent flower stems in summer, and any dying foliage in autumn