Bearded Iris prefer to be planted in well-drained soil. To improve drainage, they can be planted on a slope or in a raised bed.
The tops of the rhizomes should be visible and you should be sure to spread the roots out as you bury them below the soil. Bearded Iris are propagated and planted as rhizomes, sideways-growing stems that shoot out laterally, just beneath the surface of the soil.
Your transplanted iris will likely show new growth within two or three weeks. The first sign is usually a single new-growth leaf appearing in the center of the rhizome. Water regularly until this happens, but, once new growth begins, reduce watering to no more than weekly.