Valeriana Officinalis Nervous System Calming & Relaxing USDA Organic Herbal Supplement Gluten-Free Certified Organic by Organic Certifiers Dry Herb/Menstruum Ratio: 1:4 We prepare our Valerian glycerite from the rhizome and root of Valeriana officinalis plants. The rhizome & roots are harvested in both autumn and spring. Valerian tastes bitter, sharp and aromatic, complemented by the sweet taste of glycerin.