At ECHO this usually occurs in late November. Yams do well in sun or partial shade and prosper with ample rainfall. They require good drainage, and therefore, are often planted on mounds or ridges. They are most commonly staked but can be planted on a trellis or at the base of a sufficiently strong tree. At ECHO it has worked well to stake them with bamboo, not more than 1 inch in diameter as the vines have some difficulty twining up the large bamboo's slick exterior.
Growth is lush and very vigorous once the rains begin.
Remember the vines die back in the fall. When harvesting, be careful as the tuber skin is thin and easily damaged. The tubers are often large, several lbs. Peel away any discolored areas. They reportedly make a good French fry and chip.