While making acorn meal this fall, I held three good-looking acorns back with the intention of sprouting them in the spring. I looked up the best way to do it: place them in the fridge over winter (to simulate winter conditions), and plant them in the spring. But just for the heck of it, I decided to plant one right away and see what happened. Kept it wet and placed it in a south-facing window.
Well, guess what? It sprouted! YAY! In a couple of years, when it’s established, we’ll make it a bonsai.