With Luis giving us an update, I thought I would do the same.
I have 7 one-year-old seedlings that I've just brought out of winter storage in a friend's basement. They range from 9 inches tall to 20 inches. Seeds were from wild fruit. They are pretty thin - not even pencil thickness except maybe at the base of the tallest plant.
Not sure what i'm going to do with these. I may plant some in the ground soon or I may keep them in pots another year until they get grafting size.
My primary focus now is nurturing 72 seeds I planted at the end of January. I have 72 Treepots (14 inch deep) each planted with one seed.
Seeds are a mix of wild seed and seeds from named varieties like Susquehanna, Sweet Alice, Wabash, Sunflower, and the new KSU release Benson. I have some seeds that are just about to send up shoots. In the deep pots I think they take a bit longer while the taproot gets to the bottom. I plan to plant these in the spring of 2018 on my property. Trying to finally get my own mini-orchard! I am more excited by the roulette of seedlings than by buying or grafting named varieties.
I had some issues with the potting mix drying out and have lost some seeds. I definitely would make some changes to my setup if I did this again.