Really? It's already an established plant, not a cutting that needs to develop roots. I had assumed that it'd be able to process water even before the leaves unfurl; am I wrong about that?
Anyway, I am really excited that it survived and interested to see how fast it grows and what it looks like as it does. I'm planting the other tree in the ground tonight and I'll get some extra soil/perlite and repot this one in its large pot with new, better-draining soil.