I know we're getting just a tad off topic here, veering off onto poppies, but I do believe that the Shirley poppies, along with California poppies, don't like cold winters. I've never had volunteers from the ones I've planted here in the frozen northland. But the somniferums seem to prefer a nice cold winter.
And that will be quite enough about poppies, except to hope that Stefan will let us know how his Hen and Chicks do!