Agave Sierra Negra is a sub varietal of the Agave Americana family.  It takes up to 25 years to mature.  Sierra Negra is quite rare.  It was widely cultivated many years ago but due to it’s producing very little seed or hijuelos  and long times to mature it has been mostly abandoned in favor of Agave Espadín. Agave Tepeztate is part of the Agave Marmorata family and has a very distinct, erratic leaf structure.  It produces beautiful quiotes at the end of it’s life cycle that flower a rich yellow before turning to seed. Tepeztate also takes as many as 25 years to mature. The Sierra Negra was cultivated and the Tepeztate was wild harvested for this batch.