Varieties of Jerusalem artichoke
The most likely problem with growing Jerusalem artichokes could well be finding some tubers to plant in the first place. Often the easiest way is to plant tubers bought from your greengrocer; as Jerusalem artichokes are virtually disease-free, you do not run the risk of planting diseased tubers, as you would do if you plantedobtained in the same way. Avoid the old purple varieties, however, as these are usually of poor flavour, and after the first year save your own tubers for replanting.
If you do buy tubers from a seedsman you are very unlikely to be offered any choice. There are only two varieties in general cultivation.