Growing oaks from acorns is something kind of new to me, I've only been doing it for a couple years and with limited success thus far. So take what I share knowing that I'm still learning about this as I go. I still feel I've learned a lot and figured I'd share in case it helps even one person out.
I don't have a big south facing window or a greenhouse to start the acorns early so I have been waiting until mid April to pull mine out of the fridge and put them in rootmakers. That gives them a few days to sprout in the shop and then I'll move them outside in a week or so and bring them in if we get any colder nights. This year I planted a few different varieties of oaks (Bur-gambel, gobbler sawtooth, chinkapin, dwarf chinkapin, northern red, and swamp white) and also 6 Chinease Chesnuts.
I built a little shelter for the acorns planted in the 18cell rootmaker trays. Squirrels, rabbits, and mice can be hard on the seedlings so I wanted a way to protect them and also wanted to have it on wheels incase I ever need to move it around. We'll see how it holds up over the summer!
And I have 51 1gallon rootmaker pots with half northern red oak and half swamp white oak. I'm curious to see the growth rate differences, if any, between trees growth in these larger pots vs the 18cell trays. :think:
If you don't have rootmakers that is completely fine. Direct seeding acorns is another option. I seeded some white oaks, reds, and swamp white oaks last fall and have been seeding many more red oaks this spring. This bag of red oaks showed excellent signs of life with many of the acorns just cracking and beginning root development. I'll keep posting over the summer as these fall and spring planted acorns grow, assuming they'll grow anyway!
I stored a LOT of acorns over the winter in the bottom of the fridge, something I hadn't done before. I learned that dward chinkapin oaks are tough to store over winter and are probably best direct seeded in the fall soon after gathering them. I also had some acorns rot and get moldy on me so I'll be watching that problem more closely next year (but for just this reason I gathered plenty of extra acorns... I assumed I'd have some acorns, or entire bags of them, go bad)