Hmongs grow a lot of ginseng in central Wisconsin...Marathon County.
Marathon County has the largest concentration of ginseng farms in the U.S. Many of them have gone out of business due to a glut in the market. One Canadian Company is sitting on 1/4 million pounds of dry roots and can't get rid of them. The Asians are looking for wild or wild-simulated ginseng that does not contain chemicals like WI grown roots.
The best in the world comes from New York State.