thanks guys for all the great information it looks like as with most things that have to do with ginseng it is site specific and I will have to try to figure it out myself over time. ginseng on my property grows very slowly I think it may be because the shade is to thick. I might try to cut a tree or two letting more Morning Sun in maybe that will help speed things up
Although the lack of enough sun could have something to do with the slow growth of your' Ginseng, quite often it is a lack of Magnesium and possibly other minerals. While Brad may be correct about the 10:1 ratio of Calcium to Magnesium being okay, I just feel at 69 pounds per acre, the Magnesium levels are a little too low. Magnesium spurs root, stem and leaf growth and is needed in the plants for the Photosynthesis to occur. Plants lacking in Magnesium usually have small roots, small and thin stems and smaller leaf structure that often tends to yellow towards the outer edges first then migrate towards the center. This is especially seen when there has been an over abundance of rain which can cause Magnesium and Calcium washout in the soil.
Adding supplements to the soil ever 3, 6 or 12 months can be very costly, so you may want to look into plants that can be grown around the Ginseng that will provide the minerals and nutrients needed once they die off or their' tops die off and decay.