last fall i successfully rooted cuttings from my amur maple, a short under-story tree. i over-wintered them in large pots that i sunk in the ground. they all survived and have grown a couple feet. i dug one up to see what was going on down under -- a nice, but small root ball... because they are a LONG way from being root-bound, my instinct is to just leave them alone, however, i've called the chicago botanical gardens a couple of times, and each master gardener i've talked to says i have to get them in the ground asap.... my gut tells me no; what say you??? thanks in advance, phyl