Resources for Bearded Iris Greenhouse Propagation

Recommended References for Iris Cultivation

For detailed greenhouse propagation of bearded irises (Iris germanica hybrids), consult these authoritative texts:

• Iris by Fritz Köhlein – comprehensive botany and cultivation.
• Iris: The Classic Bearded Varieties by Claire Austin – focused on cultivars and breeding.
• The Iris by Brian Mathew (often in libraries) – scientific treatment of the genus.
• American Iris Society publications (irises.org) – bulletins on tissue culture, division, and disease management.

Key Propagation Points

• Division of rhizomes in summer after bloom is standard.
• Seed propagation requires 12-week cold stratification; seedlings bloom in 2–3 years.
• Greenhouse forcing for cut flowers uses controlled temperature and photoperiod.

University extension guides (e.g., NC State, Purdue) also offer free PDFs on iris production.