When preparing to plant iris, dig a shallow hole large enough to accommodate the rhizome or rhizomes that are available. Leave a cone or ridge of soil in the center of the hole. Don't allow the roots to clump together. The rhizome should be parallel with or just slightly below the soil surface level. Fill the hole with soil and firm around the roots and rhizome.
Water rhizomes thoroughly immediately after planting.
After initial watering, water plantings sparingly until growth begins. Start of vigorous top growth will indicate good root establishment. Since the flower stem will emerge from this fan, this will allow adequate spacing for blooms. For a larger display of an individual color plant three or more rhizomes of a single variety in a group. Plant these rhizomes closer together and have fans to the outer portion of the clump with the cut rhizome end pointed to the center.