Mixing a small batch of green onion seed, half fresh from this year, half from years ago and no longer viable. Why? The mix of dead and alive seed makes it easy to spread quickly, getting good coverage and not having to thin out a bunch of seedlings that pop up too close together. Works when seeding by hand, as I’m going to do with these, or with seeders that tend to drop a lot of seed, like the Planet Jr. and the Earthway!