cool and dark...i store mine in the fridge mostly to keep track of em but have stored in pill bottles in desk drawers and the like and they last for years. currently growing a crop of original c99 seeds that are over 5 years old and had 9/10 germ with 7 females...! that is unusual so don't count of extra f's from stored seeds...just saying if kept dry, cool and dark they should last many years...another example of good storage is gypsy's sk#1 freebies he used to send with every order. they're years old yet still have good germ rates.

but i can NOT recommend freezing them...