Agave maintenance once established. "Agave azul" (blue agave) is used in the production of tequila. In 2001, the Mexican Government and European Union agreed upon the classification of tequila and its categories. All 100% blue agave tequila must be made from the "Agave tequilana" 'Weber's Blue' agave plant, to rigorous specifications and only in certain Mexican states. The hybridized genus ×"Mangave" is created by cross-breeding species of "Manfreda" and "Agave". The ethnobotany of the agave was described by William H. Prescott in 1843: But the miracle of nature was the great Mexican aloe, or maguey, whose clustering pyramids of flowers, towering
Agave titanota Merit. Agave titanota Agave titanota, the chalk agave, is a species of flowering plant in the family Asparagaceae. It is a medium-sized evergreen succulent perennial native to Oaxaca, Mexico. The plant forms a solitary rosette of broad whitish green leaves with variable spines, occasionally producing offsets. Mature plants may produce a flower head from 3m to 6m tall with yellow flowers. As it is monocarpic, this signals the death of the plant. It can tolerate temperatures of , but in practice is best grown in a sheltered spot without severe frosts. It has gained the Royal Horticultural Society’s Award of