I plan on sprouting some apple seedsjust for the fun of it. If I can get them to grow I'll probably just use them as root stock and to practice grafting. Anyway, my plan is to use the refridgerated wet towel method to get the seeds to sprout. If I do that now then maybe Ill be about to pot them up by mid to late September. This where I get a bit confused, non of the videos I've watched tell what to do after that. I live in zone 6. Do I just treat them like a houseplants and leave the pots inside all winter in a sunny window and keep transplanting them to larger pots until they are large enough to plant in the ground?

What do I do?