American ginseng is considered a very difficult crop to grow, being extremely prone to disease, probably fungal in nature.
At one time there was an attempt to cultivate ginseng in
using shade cloth over the beds, in the belief that the low humidity of the area would keep the fungi at bay. I haven't heard anything about this effort in many years, however, so presume it failed. However, failure for business reasons rather than fungal ones seems likely.
Ginseng is very much a plant of deep deciduous forest and being found in moderately mountainous areas such as
, probably insists on good drainage.