What it means
An agave is the spiky rosette in half the front yards of Scottsdale: thick, fibrous leaves edged with teeth and tipped with a needle, arranged like an artichoke the size of an armchair. The word covers a whole genus, but in conversation it usually means one of three things: the giant gray-blue century plant, Agave americana; one of the compact native species landscapers love; or, in a bar, the plant behind tequila and mescal.
The phrase you will hear most is “the agave is blooming,” said with the tone people use for a comet. An agave spends years doing nothing visible, then, usually in summer, pushes up a stalk like a telephone pole with branches, sometimes adding inches a day, and covers it in yellow flowers. Then the rosette dies. Neighbors photograph it, birds work it, and the owner learns what monocarpic means.
The site’s Sonoran Desert plants field guide covers agaves alongside saguaros, palo verdes and the rest. This page is about the word and the plant’s local story.
Where you’ll meet it
In xeriscaped yards and medians, at the Scottsdale Xeriscape Garden, in the Desert Botanical Garden’s collections, on rocky slopes in the mountains north and east of the Valley, and on cocktail menus all over Old Town.
Where the word came from
“Century plant” is an English exaggeration of the wait: Agave americana typically flowers after about 10 to 30 years, not 100. “Maguey” and “mescal” are the Spanish and Mexican names, the second also the name of the distilled spirit.
The plant’s local history is much older than any of those words. For the Hohokam and other pre-contact farmers of central and southern Arizona, agave was a staple crop, a source of carbohydrate and fiber grown on rock-piled terraces and slopes that needed no canal water. Farmers harvested the rosette just before it bolted, when the heart held the most sugar, and roasted it in pits. The field systems ranged from a few rock-pile clusters to many hectares; the largest documented spread across the bajadas near Marana, north of Tucson.
In 2023 a team led by Wendy Hodgson of the Desert Botanical Garden published a review of six agave species that exist only as remnants of that farming, among them Agave murpheyi, the Hohokam agave, found north of Phoenix and in the Tonto Basin. Because these agaves reproduce mostly by cloning, some plants growing in ancient fields today are, in effect, the same individuals the farmers tended centuries ago. The canal builders profile covers the rest of that world.
What it is not
An agave is not a cactus, though it lives beside them, and it is not an aloe, which looks similar but is an African plant with soft, gel-filled leaves. And the century plant in your yard is not a native: it is Mexican. Arizona’s natives include Parry’s agave and the golden-flowered agave.
The fine print
The bloom is the plant’s entire reproductive budget. A rosette stores water and sugars in its heart for years, then spends them on one stalk, flowers, sets seed and dies. Most garden agaves also make offsets, or pups, around the base, which is why a dead century plant usually leaves a ring of replacements.
The flowers feed a crowd. Bees and hummingbirds work them by day. In southern Arizona and Mexico, migrating lesser long-nosed bats feed on agave and cactus nectar at night and carry pollen between plants. When the bat was listed as endangered in 1988 there were an estimated 1,000 at 14 known roosts; by its removal from the list in April 2018, the first bat delisted because of recovery, there were about 200,000 at 75 roosts. Part of the credit went to a program certifying tequila makers as bat-friendly if they let some agaves flower.
The drinks have their own rules. Mescal is distilled from roasted, fermented agave hearts, and tequila is a mescal made from blue agave in designated regions of Mexico. Arizona’s native agaves are not the source. Some of them are protected under the state’s native plant rules, so buy nursery-grown plants rather than digging any from the desert. See the desert wildlife field guide for the animals that visit the flowers.