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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.
Step 1. Plant iris bulbs in the fall into rich well drained soil that receives a full sun to a half day of sun exposure year round. Half days of sun are tolerated in warmer climates, but iris bloom most profusely when they receive day long sun.Bury the bulb 5 inches deep leaving the top of the rhizome exposed above the soil.eed your iris with a good quality granular bulb fertilizer in the spring to boost bloom. Follow dosing directions on the package. Water in the fertilizer well after application to drive the nutrients down to the bulb and roots.