Dear Jim, The pbs wiki is a compilation of the work of many people. That is the nature of the wiki. People can change each other's text, making corrections and adding information. Since we started the wiki in 2003 and have changed to a different software since then, it is often impossible to track who added information and figure out what they meant. However in this case, I found an old email from Bill Dijk who supplied the information for me and who was an early contributor to the wiki. I don't know where he got his information. I suspect that more people may need to grow this genus to test how hardy it is. Perhaps people on this list who have grown it can share their experiences for how they grow it and how much cold it can tolerate. Mary Sue