Iris flowers have captivated gardeners and painters for centuries. The showy perennial flowers add elegance to the garden and cut-flower displays. Dutch Gardens offers many types of iris bulbs for sale including German iris, Dutch iris, Japanese iris, Siberian iris and Louisiana iris. Because the different types have varying bloom times, gardeners can enjoy iris flowers from late spring to midsummer if they plant many different types. Iris are low-maintenance, easy-care plants that perform best when planted in full sun to partial shade. If planting iris near water features, choose Japanese, Siberian or Louisiana iris. If growing iris in drier conditions, consider German iris. Other considerations when buying iris bulbs for sale are hardiness zone, mature height and spread, bloom time and flower color.