I've grown Jerusalem Artichokes the past few years, or should I say they've grown themselves. I live in Southesastern Indiana and they do grow wild around here. If they start to wilt, I give them extra water. You can dig them any time after the first hard freeze. What you don't dig will come back the next year or you can plant what you don't eat. I usually mulch them and forget about them unless they wilt(too busy with other things.) I haven't had any problem with them running wild. They taste like sunflower seed and are good for dips. You can use them like potatoes.(posted 9010 days ago)