after looking at Prairie moon nursery page and seeing they do indeed sell bare root plants.
I think the answer lilahmorgan wanted to know is what size pot they can grow bare root plants in.
and like I said in my first post I recommend one or two plants per 5 gallon or larger pot
this is a 3 yr old picture of plants I planted in a pot 4 yrs ago and it has returned again this year too.
but it no where near as full or tall as the ones I planted in the ground at the same time.