Hey, just to add to the exploration of artichokes outside of their zone - mine are all still alive and I've started the vernalization process using the refrigerator method as well as a little outdoor time when it's 40+ (just started yesterday with an hour of them outside in the sun). I think I've done about 50 hours of cold treatment so far but wanted to note that mine have struggled with a fungus I just diagnosed yesterday -- it is ramularia and manifests as small patches on the leaves, which ultimately whither and die. I started spraying with milk/water mixture and they are much happier. But I did have a hard time figuring out what it was so if anyone comes across it -- well, it's a fungus called ramularia.
