I have a seed producing bed.
I started off with 44 roots in it, these were all wild roots from my area, for the most part larger roots from plants producing berries.
With the exception of a few roots that I purchased from Billy Taylor to help mix things up a bit and improve my gene pool some. I think I put 39 nice mature middle TN roots in the bed and got 5 from Billy - these were from south eastern KY.
Below is a post that includes lots of details.
www.wildgrown.com/index.php/Ginseng-Foru...3-seed-bed-dirt.html
One advantage to putting them all together like I did is you can put a fence around them, and keep the deer and turkeys from eating your tops and berries.
I have had this bed since 2010 best I remember, and I have never had a top eaten from it or turkeys in there scratching around. You can also put out poison for the seed eaters once your berries start filling out. If you don't they will sure get every one of them.
I have a 4\" diameter drain pipe around 3' long staked down to the side of my seed bed, and I fill it with decon rat poison pellets when my berries start filling out.
That does the trick. I am not real sure what eats them, but expect it is a combination of field mice and chip munks.
TNhunter