Iris are classic perennials with elegant and colorful flowers. Choose from a wide selection of iris bulbs including the gorgeous German Iris, or Bearded Iris, that start off iris season when they burst into bloom in late spring. German Iris are grown from rhizomes that are often planted in the fall. Dutch Iris, grown from bulbs, bloom after German Iris. Some of the best iris to plant near water features are Japanese, Siberian and Louisiana Iris. All iris are excellent as cut flowers. While all iris types are sun lovers, their grow zones vary. Before buying iris bulbs, make sure they are suitable for your grow zone. Other factors to consider are their soil requirements, mature height and spread, bloom time and flower color.