12 to 24 inches apart with the top of the rhizome at or slightly under the surface of the soil. Divide the clumps every three or four years to avoid crowding problems. Irises may take a season or two to rebloom after transplanting.

How long does it take for iris to bloom after transplanting?

Caring for New Iris

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.

How do I get my iris to bloom again?

Deadhead the iris frequently to encourage new flowering from buds growing further down on the stem. Let as much of the foliage remain on the plant as possible because it will continue to absorb the sun and feed the stems. Once flowering is over, cut the stalk down to the soil level but not into the rhizome or bulb.