Shelf life for seeds?

Recently, a food and wine pairing prompted me think that I need more spice in my life. Tasting a leek or chive stalk, remaining in the garden after I was going to mulch it over, made me reconsider vegetable gardening,…

Will old seeds germinate?

I have several packets in a tin of seeds, some of which were quite expensive.  I hate to throw them away.  Some are three to four years old. Any guidelines?…