i've found, farmer harrypotter, that seeds that have been stored at a constant, cool temp, in darkness is a great way to keep seeds over time.
you'll hear a lot of people place them in film canisters, or pill bottles with a lil pack of silica gel and toss em in the fridge.....for longer term storage.
if found, that if a seed is subject to temperature fluctuations and light and dark hoopla, germ rates diminish, quickly, as time goes on.
so the key is CONSTANT cool temps in darkness.
only one way to find out if theyre still viable.
chuck em in some waddah or a wet paper towel and wait.
-cap