Jerusalem Artichokes are a member of the Sunflower family that has edible tubers that grow similarly to potatoes. They are regrown, like potatoes, from sprouting tubers - or from tubers you missed from last year! Because of this, they can be a bit invasive and you can grow them in containers if you are concerned about missing any.
Like their family members of sunflowers, they can grow from 3 to 12 feet high with large leaves and flowers that are 1 1/2 to 3 inches in diameter. They grow well in almost all soil with the exception of very heavy clay soil, but do best in alkaline soil.
Sunchokes are easy to grow from tubers that weigh about 2 oz. and have 2 or 3 sprouts emerging. Plant them deep, about 3 to 4 inches underground. They do best when planted in little hills for better water retention and to make harvesting easier. Plant them in the spring through early summer, and harvest them fall through early winter.
Here is a good link for more information http://www.vegparadise.com/highestperch26.html
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