for me, dan's peat pot method worked. out of 10 that i used peat pot on, 5 are now in 8" pot, and two are in 4" pot to be given away. i already gave away one, and i threw away 1 due to mold. one is not showing any root. so that's about 80% moving into larger pot from peat pot. i'll see if they turn into tree by next summer.
pete