Unlock the Power of Herbs. Adapted from Rosemary Gladstar's Medicinal Herbs: A Beginner's Guide, this calendar will help you stay healthy all year long. The best-selling author and beloved herbalist provides tips and recipes for boosting immunity with echinacea, reducing fever with elder, and soothing a sore throat with sage. Learn about supporting heart health with hawthorn, nourishing the nervous system with green oats, calming a cough with thyme, and so much more. Have a healthy year! New plastic-free packaging!