About a month ago, I pulled this "tree" out of the roof - Its roots had grown into the insulation - I got a looong tap root, but not much else attached to it.

I had thought about planting it but forgot and it sat in a plastic bag for about a week before I saw it was sprouting leaves...

So it's about a month ahead of schedule, maybe two, comparing to the outdoor trees right now.

It obviously has a lot of growing left to do... do I just wait until it warms up and plant it in the ground?

Any idea what kind of tree it is?

I was debating pruning it back, but since it had so few roots when I pulled it out, I didn't want to mess with it...