Jerusalem artichokes grow like weeds (here in SE Texas at least) and can be left in the ground to overwinter just about anywhere, I would guess. I harvested mine when the tops died down. One thing I would like to mention that I haven't seen mentioned before--those things make most people bloat up like a dirigible with gas. It's the inulin, I believe. It was well documented on the Lewis and Clark expedtion that the natives shared these with the expedition and they nearly asphyxiated themselves. Hoo--wee. Gross but true.(posted 9003 days ago)