The record for me was some surplus Ferraria corms that survived several years (more than two) in the garage. When I found them they looked unwithered, so I tried a few in a pot. I was very surprised when they grew just fine. Unfortunately, I have no idea which species they are, because they're very frost-sensitive and even our mild freezes here are enough to cut them down every year. But at least they're alive. Mike San Jose, CA