How to Propagate iris 'Blue Luster'?
Propagate by division of rhizomes from midsummer to early autumn, see dividing irises

iris 'Blue Luster' · Iris 'Blue Luster'
Grow in well-drained, fertile, neutral to slightly acid loam in full sun. See bearded iris cultivation
Propagate by division of rhizomes from midsummer to early autumn, see dividing irises