I'm in NE Iowa, and we are one zone or more northerly than you. I have everything in the ground mostly, except for a few. Might as well stick those in the ground too,and put a brick on them as someone suggested, rather than just abandon them. It will be a test! And I have a few dug clumps that I planned to get rid of that are still hanging out at the edge of some bushes. Think they will be a test of hardiness too!
