Nervous System Minor Pain USDA Organic Herbal Supplement Calendula Liquid Extract Certified Organic by Organic Certifiers We prepare our Calendula Extract from the whole flower of Calendula officinalis plants which are Certified Organically Grown on our own farm. To assure optimal extraction of Calendula's bioactive compounds, the flowers are hand-harvested while in full bloom, are carefully shade-dried to retain their full color & aroma, and are then thoroughly extracted. Our Calendula is never fumigated or irradiated.