A Way of Obtaining Bonsai

Today I found and collected a tree. Above ground it measures 2ft by 2ft.
You are right - now is not the time to replant. It will stress the tree unnecessarily.
But I didn't just repot the plant. I ripped it out of the ground and stuffed it in a plastic bag. Then I jammed it in my vehicle, and went to MacDonald's. After dinner, I knocked most of the soil off the root ball. Now I am going to leave it unpotted overnight, and do the dirty work tomorrow when it is light. Did I mention the tree has been mostly uprooted for almost three weeks prior, and was sitting in dry soil anyway? (I gave in and saved the poor sapling.)

I think the tree will be all right.
1) The tree is a boxwood. Boxwoods are quite hardy. Quite.
2) I am soaking the tree in water and B vitamins. The vitamin is supposed to increase water uptake, meaning the plant can rehydrate faster.
3) I will care for the plant. I will ensure it has proper food and watering. I will shelter it from the wind, yet give it sunlight. I will plant it in a soil which will nourish the roots.
4) I will not style it until it is healthy.
5) It is winter. In winter the tree is not very active. A dormant tree doesn't need much water, so the dry soil it was in wasn't a problem, nor is taking a long time to pot the plant.