You need to control your shade to seventy percent. Ginseng likes to have exposure to the morning sun, but it needs to be in shade by 1:00 p.m., as ginseng likes cool afternoons. Southwest corners of woods should be highly shaded to help keep ginseng plants cool in the late afternoon.
You can tell where the light is right in your woods by studying the undergrowth. Too much vegetation means too much sun, and ginseng will not grow there. You might clear out this area and build some artificial shade. No undergrowth means not enough sun, and ginseng will not grow there. Ginseng needs 4 hours of direct oscillating sunlight
Ginseng likes potassium; bone meal is an excellent source and is available at your local farm or garden store.
Ginseng likes nitrogen. Decomposed leaf matter is a nice source of nitrogen. You should put small (thirty inch) survey rods in your beds, about twelve feet apart. During storms, static electricity is attracted to the rods. This releases nitrogen. Ginseng loves it.