Hardy artichokes- Lulu?

February 19, 2017
Hi, I'm wondering what artichoke growers have found to be the most cold hardy. We've tried Imperial (pretty good luck with that one), Green Globe, and Violetta. We're wondering if anyone has tried the Burpee's "Lulu"? Burpee's claims it's hardy to zone 3, which I find hard to believe. We're in zone 4 and have had some luck with just marginal protection. Had two Imperials come through this winter and they were frozen absolutely solid when they started growing.

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