Although many online stores market "Wild American Ginseng" or "Wild Wisconsin Ginseng", it's hard for the average consumer to determine its authenticity.
When you decide to invest or purchase a Wild American ginseng, the Rule of Thumb is " Do not buy it if you do not see the full rhizome or root-neck with less than 5 scars (no less than five years old)!" Cultivated ginseng usually has less than 5 scars (five years old). Wild ginseng has to be at least five years old before harvest. Some wild-simulated roots (grown like wild with planted seeds and under no human care) may have more than five scars due to longer growth.
Here is how you count the scars of the root-neck