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

Iris 'Sunset Sky' · Iris 'Sunset Sky'
Thrives in a sunny position, in neutral to slightly acid soil with good drainage. Plant rhizomes just above soil level, as sun on the rhizomes encourages flowering. See bearded iris cultivation
Remove spent flower stems in summer, and any dying foliage in autumn