I love love love this iris garden idea! And we have the perfect place for it! Can't wait to add this beauty's to Casa Johnson's landscaping! Tops the list...after transplanting a bunch of other stuff first of course!
Plant rhizomes 12 to 24 inches apart. Close planting results in immediate effect, faster clump formation, and more color but makes dividing clumps a necessity in two to three years. Plant each of the rhizome "toes" facing inward towards each other.