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 schottii direct sunlight. Individuals of this species are flowering shrubs. The "Agave schottii", like other "Agave" species, are succulents with a rosette of thick, blue-green, finger-like leaves with sharp spines on their tips. The "Agave schottii" is different from other "Agave" in that the leaves do not have spines on its edges, which makes it a member of the "Agave" subgenus Littaea. Its leaves typically grow to a length of about 0.3 meters (0.98 feet). Because its height is about that of a human's shin, and because it has sharp, spiny leaves, this species has been given the common name "Shindagger."