We prepare our Stoneroot Extract from the fresh (undried) leaf flower & rhizome (no stem) of Collinsonia canadensis plants which are Certified Organically Grown on our own farm without the use of chemical fertilizers pesticides or herbicides.To assure optimal extraction of Stoneroot's bioactive compounds the plants are hand-harvested at their optimal potency and are then taken directly to our laboratory and promptly extracted while still fresh and succulent.Other products from HerbsPro