Sometime ago I purchased 25 lbs. of organic alfalfa seeds from a co-op with the intention of growing sprouts. Then I found that the seeds only last two years before loosing their capacity for germination. What I went on to do was put one or two cinnamon sticks in each gallon jar of seeds that I had in the cupboard. After seven years, I was still growing sprouts from the same batch of seeds. Cinnamon has an anti-biotic property to it, and I had figured that it could stem the tide of bacteria and mold in the containers. I think it played it a major part in preserving the seeds. So try this when you are creating your seed stocks. Its also important to keep the seeds dry and in a cool place.
Offered by Charles.
Here's an add-on to Charles' idea: Spray or wash any seeds for storage with Colloidal Silver and allow to air dry (not in the sun). The mold and bacteria inhibiting ability of Colloidal Silver is simply incredible.
Offered by Ed