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 handharvested at their optimal potency and are thentaken directly to our laboratory and promptly extracted while still fresh and succulent.Our Stoneroot is never fumigated or irradiated.