Figure this is the best forum to ask, considering no light or moisture whats the "shelf life" of seeds? Im guessing years as I got started with seeds I found in my garage probably 2-3 years old.
HIGH All, start germing them and see whats happens. I've never had seeds that old, I'm guessing they'd probably not All germ...maybe a few. Just give it a go.
They start losing potency to grow every year. I guess that if you had 10 seeds 5 years old, at least one of them should grow, but don't expect them all to grow.