Agave tequilana planting these shoots; this has led to a considerable loss of genetic diversity in cultivated blue agave. It is rarely kept as a houseplant, but a 50-year-old blue agave in Boston grew a stalk requiring a hole in the greenhouse roof and flowered in the summer of 2006. Tequila is made only from a specific cultivar of "Agave tequilana" called 'Weber Azul'. This cultivar is larger and blue-gray in color compared to the smaller and green normal "A. tequilana". It is a rapid grower and prolific offsetter in keeping with its agricultural advantages. Tequila is produced by removing the heart
Agave polianthiflora species of "Agave". It prefers a shallow, well-drained soil and regular fertilization during vegetation time. As a container plant grown in cold climates, during the winter it may be kept in a completely dark place. Agave polianthiflora Agave polianthiflora is a relatively small member of the genus Agave, in the subfamily Agavoideae, endemic to northern Mexico. The succulent is native to the States of Sinaloa, Chihuahua and Sonora. "Agave polianthiflora" produces a small basal leaf rosette of about in diameter. Leaves are narrow and lanceolate, with multiple white filaments protruding from their edges. Flowers are red and tubular, in length