I started a lot of Siberian Pines from seeds last year and a LOT more this year. I bought a lbs of seeds this past Winter and it seems like there must have been over a thousand seeds.
It was really cool, because it came the seeds came into a cotton bag.
I then soaked them for 12 hrs and stratified them in the fridge until a lot of them were showing signs of sprouting. I would rinse them every second day to avoid mold from growing on them.
I had seeds left over from last year that stratified in a bucket burried in the ground over the winter. They pretty much all came up. Hopefully the new seeds will be the same.
I think it is way easier to get them to stratify in a bucket. Ideally, it would be better to plant them directly where we want them, but squirrels and other rodents seem to be very fond of them, so protecting them until they sprout is very important.