The way I understand it is they will keep growing in same patch year after year. I would think if they were dug up every year they would thin out. Who know.
Ourself. We are doing a strip loin(?) this one will age for 45 day. Also there are 2 venison roast that will age for only 7 days since there is no fat.
It a Steak ager unit that goes in fridge.