COMFREY, RUSSIAN Symphytum x uplandicum Perennial Bocking No.14 - best strain for home, garden & medicinal use highest allantoin content medicinal culinary labour birthing sow: early spring late summer, early fall anytime The preferred type - highest concentration of protein and allantoin - more rust resitant Birthing: Heals tears and injuries caused during birthing. Also strengthens muscles and tissue, and provides nutrients to rebuild the body.