I am a long way from Minnesota but I am growing Minnesota plants here in East Tn. They are ripening here right now so I would think that they would be getting close to blooming in your state. I would not think that they would be ripening there for another month to a month and a half. We had a cold winter here this year and they survived temperatures down to 28 degrees after they had already grown several inches high above the ground. They are hardy so I believe you'll see some berries in the Fall. Good luck.
I have a good population of wild Ginseng on my property. I've been covering a few dozen of the really nice big seed producing plants for the past couple years to protect the berries and keep expanding the wild population on my land. I can't protect every plant but this one is a five prong with over twenty five berries, I really want those strong genes in my population.
Its nothing more than plastic garden fence from the local big home improvement store. I cut off a piece connect the ends with zip ties and pin it to the ground with small sticks being careful to stay clear of the root. I use a small piece for a lid and it seems to deter deer and has gotten a lot of nice seeds to planting stage. I have a few larger ones for plants that are growing in a group. When the berries get red I plant them roll up the cage and put it in the shed till next year.
I know they're easy for a poacher to spot but so far I've been lucky and I don't have a big security problem here.