Lenno,
First of all, congratulations on some nice ginseng. Your plants look very similar to my oldest patch and your seed pods look like they are on just about the same time schedule as mine. They look like they will mature in the middle of July. If they do, what will you do with them, and how will you replant? This looks like seed that originated in Minnesota as my early seed did and it can be hard to get it safely to reproduce without loosing a lot of it. I'm all ears about how to deal with early ripening seed. By the way, have you dug any to see how the roots are maturing? From the looks of the tops they could be ready just any time. Good luck with them.
Hugh