Longtime organic gardener Jill Henderson explains how preserving open-pollinated and heirloom garden seeds from one season to the next will not only save gardeners money but will also increase their self-sufficiency, help them maintain a naturally diverse gene pool of food plants, and guarantee the purity of their seeds in the age of genetically modified organisms (GMOs). Armed with these simple tips and instructions, anyone with a green thumb will find seed saving easy and rewarding. Jill provides an overview of how pollination works and explains the differences between open-pollinated and hybrid plants. Plants are categorized into two groups: those that are easy to preserve and those that require much more time and attention. Expert guidance is provided on how to properly harvest, clean, dry, and store seeds to obtain the best germination rates.