I got up early and energized this morning, and finally divided up my Siberian Iris from my front yard. I have the leftovers sitting on a tarp in front of my house (931 Mellon). Feel free to come and get some. Leave the tarp please if you are the last to pick some up. These get to be about 2-3 feet tall with blue flowers in the Spring, around Mother's Day. They do spread and get dense, but dont spread too far. If you leave them in a confined space for 8 years without thinning them out, then they get pretty dense. I know that from experience. In my back yard, they have formed a small clump and are not invasive. There are a few big clumps at the end of the tarp closest to my neighbors house, and the smaller clumps and individual plants are closer to the front door. They are not real wet, so you dont need a plastic bag or tarp to move them in. There is also some sedum there, that blooms yellow. Bob 931 Mellon Street in Highland Park Between Jackson and Wellesley, with the closed-in front porch