Between the concern about GMO seeds and a difficult economy, gardeners are more and more interested in seed saving. The Seed Savers Exchange has been around for years and is now celebrating 35 years of helping people find and continue growing heirloom, open pollinated seed for hundreds of vegetables and flowers Kent and Diane Ott Whealy founded the SSE and you needed to be a member to get seeds (and they were free) from the owner of the…