Heirloom seeds are more than the promise of next summer's crookneck squash or jewel-colored zinnias. They're living antiques handed down from one generation to the next, a rich inheritance of flavor and beauty from long ago and, often, far away. They are sometimes better adapted to pests and harsh conditions than many modern varieties and often simply smell or taste better. Gardening with Heirloom Seeds serves as a resource for gardeners, cooks, and plant lovers of all levels of expertise who want to know more about finding, sharing, and propagating the seeds of heirloom flowers,...