About two months after pollination, the seed pod will turn brown and split open. Harvest the golden brown seeds in a small paper cup, and allow them to dry out for a couple more months. Keep the cup in a cool, dry place. Be sure to keep the record of the parents with the seed.
In late October plant the seed about 3/4 inch deep and 1 inch apart in well drained soil. Again, label your plantings clearly so that you can identify the sprouts next spring. The planted seed should spend the winter outdoors, planted in full sun.
The following spring little Iris will grow from the seed you planted. Replant and space out the "baby" iris when they become crowded. Label each new planting clearly.
Grow your newly developed Iris to maturity and enjoy the blooms. If you develop an exceptional beauty, with strong growth habit, you might consider registering it with the American Iris Society. (You will need the information on the parentage in order to register the new Iris.) The AIS is open to all who grow and love Iris, both professionals and amateurs alike.