Lol, some 5-7 year old seeds popped for me today. Heres to hopin they grow into healthy seedlings. Great thread btw! Ill throw this link in here From hightimes http://www.hightimes.com/read/5-tips-germinating-old-seeds
update on 6 year old beans that i popped plant in the back on the left is the old bean, she's doin very nice. took a few clones of her as backups, grew out another sister bean, maybe i should fem them eh? maybe next go around