Many of hybrid origin, species native to northern temperate regions; the name is for the Greek goddess Iris who supposedly walked between heaven and earth on a rainbow, and wherever she stepped on earth there arose flowers with as many colors as the rainbow (refering to the many colors available in this genus); irises can be found in most styles of gardens in most countries.
The bearded hybrids can be grown in almost any average to rich, sandy loam but must have full sun, excellent drainage, and good air circulation to perform best and prevent rhizome rot and leaf spot diseases. The bearded hybrids are also prone to iris borers. Cut down any diseased foliage and dig up and destroy infested rhizomes. If needed, divide and transplant rhizomes in summer after flowering is complete. Do not wait too late in the year to plant iris as they may not become established enough to bloom the next spring.