I just received some apple tree cuttings which I placed in a bottle with water to see if they would sprout roots. If I am successful I can put them in a pot to grow, but where should I put them for the winter. I live in zone 6 and I don't think they would survive outside. What would be the best way to do this so they would survive till spring. This is my first attempt with a fruit tree and I thought it would be fun to try.