Also today I planted the five potted Bur oaks which I've been dutifully watering all summer. They are not mulched or fenced yet. I'm basically following the instructions in Dave Jacke's Edible Forest Gardens, Volume 2. (Hole 2x the diameter of the pot, domed bottom hole, no amendments in the hole other than mycorhizal inoculant.) I'm going to omit the cardboard layer as there are not that many weeds growing out here to suppress.
I hope I didn't kill them to death. For container plants he says to spread out the roots and roughen up the outside of the root ball before planting, but when I did that huge chunks of the dirtball tended to fall off, which he says is a bad thing.
Made my own inoculant out of a couple of shovelfuls of forest soil mixed with wood-chip based mulch.