Speaking of tubers that grow in cold climates - I have a question about " Jerusalem artichoke". http://www.vegparadise.com/highestperch26.html ( in German : "topinambur" , Amadeus :-) They contain no starch , but an (indigestible ?) polysaccharide "inulin" ! What is the nutritional value ? (calories - indigestible inulin ?) Do they contain any antinutrients (raw) ? Theese tubers taste quite good (especially raw) - and are incredibly easy to grow . No storage is needed - the best is just to leave them in the ground (frost-resistant). Esben