I ordered from the Missourri state nursery. Per tree their prices are about the same as the other state nurseries, but they sell in quantities of 25 trees. I can get a better variety of species in the same # of trees in an order. Most of the state nurseries seem to have minimum bundle sizes of 100 or 500. I'm planting by hand with an OST dibble bar, so on a good day I can't plant more than a few hundred.
