Plant your bearded Iris rhizomes in a sunny spot where the soil is well-draining and has a pH level of a little less than 7. If necessary, do a soil test and amend the soil accordingly.

Allow for plenty of space between rhizomes so they don't get too crowded as they will spread with each passing year. Prepare garden bed by loosening soil to a depth of about 12 inches. Mix in a 2 to 4 inch layer of compost and dig a shallow hole that is large enough to accommodate the rhizome or clump of rhizomes. The hole should be about 10 inches in diameter and about 4 inches deep. Form a mound of soil in the center of the hole for the planting base. The rhizome should be placed on this mound—high enough so the top of the rhizome is slightly above soil level. Spread the roots down the sides of the mound. Fill the hole with soil, firm it gently and then water well. Each grouping of irises should be spaced about 2 feet apart.

Caring for Your Plants

When your bearded irises are done blooming for the season, cut back the green foliage to about 4 to 6 inches high so the plant won't waste energy trying to maintain the leaves throughout the winter. Divide your rhizomes every 3 to 4 years. Keep in mind that bearded irises not always guaranteed to bloom and will highly depend on soil, climate, and location. While they can vary from one year to the next, the flowers are always exquisite.