Seeds that are four or five years old often just need help getting through a hardened shell. Lightly scuffing the coat with fine sandpaper, a short soak with a little hydrogen peroxide, and warmer than usual temperatures all improve the odds. Step by step notes for each of these tricks, and which ones to avoid combining, are posted at https://queenfeminizedseeds.com. Even with all that, expect a fair number of old seeds to stay dormant for good.