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The best time to move iris is six to eight weeks after they bloom. Division and transplanting can be done at the same time. I would try to flag them now with some type of marking system while in bloom so that you know what you are moving later.
Prune back the entire iris plant to within 6 inches of the ground after the foliage begins to yellow in fall. Remove the old foliage from the bed and dispose of or compost it. Spread 2-inches of mulch over the iris bed after trimming, if these are first year plants or if your area experience winter freezing.