Answer: You can store iris rhizomes for about 6 months without harming them too much, although they will shrivel up somewhat and will take some time to recover. I think it would be better to simply plant them temporarily and then replant them next year when you have more time. You can prepare a planting bed, set the rhizomes just below the soil surface, cover them, water them in well and then spread 2-3 inches of compost over the top. They will begin to sprout next spring and at that time you can dig and replant them without interrupting the flowering to any great degree. Best wishes with your irises.
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