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.
Why Irises Won’t Bloom: What To Do For Iris Plants Not Flowering - Irises are one of the easiest flowers to grow. When you notice iris plants not flowering, the cause can stem from a variety of issues. To learn more about what causes this and what you can do, click this article.