Tammi Hartung is the author of "Cattail Whiskey and Milkweed Medicine", "Homegrown Herbs, " and "The Wildlife-Friendly Vegetable Gardener". She has been growing and working with herbs for more than 30 years and is a frequent teacher and lecturer. She and her husband cultivate more than 500 varieties of herbs, heirloom food plants, and perennial seed crops on their organic farm in Colorado.