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 angustifolia similar to "A. karatto". The "A. vivipara" of Miller (1768) and Smith et al. (2008) seem different, of a much smaller habit and narrower leaves, from the "A. vivipara" of Trelease (1913) and García-Mendoza and Fernando Chiang (2003), of a much larger habit. Agave angustifolia Agave angustifolia (Caribbean agave) is a plant which is native to Mexico and Central America. It is used to make mezcal and also as an ornamental plant, particularly the cultivar 'Marginata'. The "World Checklist of Selected Plant Families" regards "Agave angustifolia" as an illegitimate synonym for "Agave vivipara" L. Other sources maintain them as distinct