Answer: Iris can be dug and divided anytime after blooming. Dig the clumps and divide by cutting the ends from the rhizome and discarding the old center portion. Prune the roots and tops back to about 6-inches and then replant, putting the tops of the rhizomes just below the surface of the soil. Water them in well and then mulch over the top of the bed. Your iris will be all settled in and ready to grow next spring.
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