SG, The advice given was good but not necessary. You CAN pack them in a dry material such as sawdust, but as long as they are kept dry, they will be fine. If you have ever purchased Iris by rhizomes, they look completely dry and dead. The key is getting all the soil off the rhizome and dusting them with a fungicide to keep them from rotting in storage. I suggest digging them up, washing them off with plain water to remove ALL soil and letting them air dry. I would divide them into one , two or three rhizomes and then dust them with a dry fungicide (you can get this at some nurseries or ask them what they would recommend for your climate). Throw them in a brown paper bag and keep them someplace cold (simulating winter)and replant them in the
spring. Yeah, you may lose a few but so do commercial growers. Hope this helps. Becki