Siberian iris are usually dug in the fall in milder climates. One thing to remember if you are going to give the extras away is to keep the roots damp. If the roots dry out, the plant will die. The growers who mail them use the polymer crystals that absorb water to keep them wet while in the mail. If you are just giving them to friends you can wrap the roots in a wet paper towel and then put them in a plastic bag. Leave the leaves out of the bag. They can be put in the refrigerator for a week or two if you need the time to redig the bed. Don't trim the roots when you plant them.
