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 shrevei slowly compared to larger agaves. Some of the indigenous peoples of the region consume the plant as a food source. The immature flowering stalks are sweet and juicy and easy to harvest. People either eat them raw or brew them into alcoholic beverages. The leaf bases are also edible, but require roasting to destroy unpleasant chemical compounds Agave shrevei Agave shrevei is a member of the family Asparagaceae, indigenous to the Sierra Madre Occidental in Mexico, along the boundary between the states of Chihuahua and Sonora. Two subspecies are currently recognized, although a third has been proposed ("A. shrevei" subsp.