I live in Zone 5 and have successfully grown them and harvested big 'chokes the first year by setting them out in the "iffy" weeks prior to danger of frost passing (50-70 degree days and 30-40 degree nights). If it freezes, I bring them in, if it gets too warm, I put in shade. More work, yes, but worth it, because this is the best variety of artichoke of the five that I have grown. I only grow artichokes as an annual and this one outproduces Imperial Star for me when grown as described above. (I think the process is called vernalization).
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