Woodsgrown...
You should consider buying and reading thru the book shown in the amazon link below.
www.amazon.com/Growing-Marketing-Goldens...cinals/dp/0914875426
Scott Persons book on Ginseng, Goldenseal and other Woodland Medicinals (Growing and Marketing).
I think most everyone here, that is growing, has that book and found it to be a very good source of info on all things ginseng and more.
On Pg 60 he gives a extensive list of plants that would indicate that your location would be a good place to try growing ginseng.
Trilliums are on that list. He did not give any details on which specific types of trilliums - just said \"Trilliums\".
I know where I am growing ginseng now, and it is doing well, there are some trilliums present - not high quantity, but just a few here and there.
Where my wild simulated plantings are doing best I do have Maidenhairfern present, and over the past couple of years I have focused my wild simulated plantings in areas where maidenhair fern is present. I had always noticed the MHF as being one of the best indicator plants of wild ginseng, along with bainberry and a few othes.
Anyway... after Scott gives a rather extensive list of plants that can indicate that a location is worth trying (whic includes trilliums)... He goes on to say this.
Some of these companion plants are \"Calcicoles\" (normally growing in calcereous soils) and need conditions nearly identical to ginseng and he then listed Maidenhair Fern, yellow ladies slipper, bainberry, and blue cohosh.
Ginseng thrives --- in soils that are high in calcium and the list of Calcicoles he provided are the same way and indicate locations that have good levels of calcium in the soil.
If you have healthy reproducing wild ginseng growing in the location you are considering planting - that is the absolute best indicator.
If you don't --- but have some of the Calcicoles growing there - good sign that you will have success there.
If you do or don't have Calcicoles growing at your proposed location - I would recommend a soil test. Just rake off the top inch of soil, and collect samples from the next 4\" or so of soil. Collect several samples from the area you are thinking of planting, and mix them together and then send in a soil test sample from that mix.
What you want is a faily low PH - around 5.5 would be Ideal and Calcium levels in the 2000 ppa or higher (up in the 4000-6000 would be sweet).
Below is a picture of MHF and there is some Mayapple in there too.
TNhunter