Last year I was given peaches from South Carolina, and for fun thought I'd see if I could get a seed to germinate. I threw it in a ziplock in a little soil and stuck it in the fridge, not thinking it would actually work. Well several months later it had sprouted and is now a large plant! It's currently inside, in a large pot.

My question is, when should I place the tree outside? Is it too small to transfer into the ground now to overwinter? Should I keep it outside in the pot, but insulated from frost? (We are in New Hampshire, zone 5B). Or keep it inside over the winter and then plant out in the spring?

I realize I have no idea what variety this tree is, and it may die or not even have fruit, but I'd like to give it a chance! Thanks for your help!