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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.
4. Water irises every week after planting and during the first spring and summer. Also water irises after flowering each spring. If your irises are rebloomers, continue to water through summer if rain is lacking, until they bloom again.Other than that, irises usually do not need water unless there is a drought.. Water irises every week after planting and during the first spring and summer. Also water irises after flowering each spring. If your irises are rebloomers, continue to water through summer if rain is lacking, until they bloom again.