How to Propagate Crimean iris?
Propagate by seed in a cold frame in autumn or spring. Lift rhizomes and divide clumps from midsummer to early autumn

Crimean iris · Iris lutescens
Grow in well-drained, fertile, neutral to slightly acid soil in full sun
Propagate by seed in a cold frame in autumn or spring. Lift rhizomes and divide clumps from midsummer to early autumn