While it’s often mistaken for a desert-dwelling cactus, the Blue Weber agave is a botanical marvel that shares more DNA with a garden lily than it does with a prickly pear.
This singular, spiky succulent is the heartbeat of the tequila industry, requiring many years of patience and extreme environmental resilience before it can be transformed into the world’s most complex spirit. Understanding this extraordinary plant is a key step toward truly appreciating the liquid in your glass.
Here are nine remarkable truths about agave, many with commentary from some of the greatest agave growers and tequila makers in the business.
1. Agave plants are succulents, not cacti
Despite their rugged, thorny appearance and ability to thrive in harsh, arid landscapes, agaves belong to the Asparagaceae family, making them close relatives of lilies and asparagus. While cacti are characterized by their ability to store water in their stems and the presence of areoles, agaves store their moisture in their fleshy, fibrous leaves (called pencas) a biological distinction that dictates how they survive and how they are eventually processed.
2. There are hundreds of agave types, but just one makes tequila
While there are over 200 recognized species of agave in Mexico, the production regulations for tequila mandate that only Agave tequilana Weber azul can be used for its production. This biological exclusivity is what separates tequila from its cousins, mezcal, raicilla, and bacanora which can be legally crafted from many different wild and cultivated agave varieties.
3. Blue “Weber” agave is named for a European botanist
The "Weber" in Blue Weber agave honors Frédéric Albert Constantin Weber, a French-German botanist and military physician who officially classified the plant in the late 19th century. His scientific work was pivotal in distinguishing Agave tequilana from hundreds of other agave species, identifying it as the ideal candidate for spirit production due to its high sugar concentration.
4. Commercial Blue Weber agave is grown from clones, not seeds
Nearly all commercial Blue Weber agave fields are populated by hijuelos, which are genetically identical clones that sprout from the base of a mother plant.
image from Envato
Legendary master-distiller Sergio Cruz is the maker of Alma del Jaguar, Tierra de Ensueño and many other tequila brands, and says (his answers in this article are translated from Spanish): “ The fastest and most economical method for propagating agave is the selection of shoots (hijuelos). What we look for when selecting baby hijuelos to harvest:
Vigorous shoots
Deep, intense blue color
Visibly free of pests and diseases, and genetic disorders
One of the challenges with hijuelo propagation is that each agave is a genetic copy of its mother, creating a monoculture. Says Cruz: “Since each offspring is identical to the mother plant, agave become more and more susceptible and vulnerable to pests, diseases, and climatic factors.”
Blue Weber agave CAN be grown from seeds, but it’s difficult to achieve, at scale.
“The seed method is slower and more costly, with low survival of new plants. However, it increases genetic diversity and improves resistance to pests and diseases,” Cruz explains.
5. Agave grows on the ground, not in the ground
Unlike root vegetables such as potatoes or carrots, the agave piña (the heart used for tequila) sits entirely above the soil’s surface. This allows the plant to directly absorb sunlight and air through its leaves, while a relatively shallow, fibrous root system anchors it to the soil.
Luis Villalobos Obregón, founder of El Ateo Tequila explains how Blue Weber agave “breathes”:
“Agave is a Crassulacean Acid Metabolism (CAM) plant, allowing it to adapt to arid environments. This adaptation allows it to open its stomata at night to absorb CO₂ with minimal water loss, storing it as malic acid, and perform photosynthesis during the day. It is highly efficient in its water use.”
“The taproot at the lower part of the piña acts as an anchor and penetrates more deeply to take up moisture and nutrients from deeper soil layers. And then the fibrous roots, which extend to roughly the same diameter as the leaves and are shallow. This allows these roots to establish themselves in almost any type of soil. Care must be taken that the soil does not retain excessive moisture, because this can lead to problems with root rot.”
6. Agave plants are never watered
In the world of tequila, agave is dry-farmed, meaning it relies entirely on natural rainfall rather than artificial irrigation. This lack of intervention forces the plant to "struggle" through the dry season, a process that concentrates its natural sugars and creates the complex, terroir-driven flavors that fans adore.
Cruz explains: “Agave needs stress in order to grow. The plant stores energy as inulin or fructans. It is not necessary to irrigate because during the day (when there is sunlight) it closes its stomata to prevent evaporation of its internal water reserves, and at night it opens those stomata to release oxygen. Also, its leaves are waxy and capture nighttime dew and funnel it to the shallow roots.”
7. For agave, size doesn’t matter (but age does)
In the agave fields, a massive 150-pound piña may be less desirable than a smaller plant that has reached full physiological maturity.
“The size of the piña does not influence the flavor of the tequila. What provides flavors, aromas, and alcoholic richness is the agave’s sugar content. A good agave should have at least 24° brix (sugar level), and it can reach up to around 40° brix,”
Fany Camarena, commercial director for Tequila Ocho concurs: “The size of the piña does not determine flavor on its own. What truly matters is that the piña — regardless of its size — shows clear signs of full maturity. That maturity is what provides the sugars needed for tequila production. It makes little difference whether those sugars come from one very large piña or, for example, from several smaller but fully mature ones.”
It’s the young plants that should be avoided, not the small ones, according to Camarena: “Harvesting younger agaves, typically around three to four years of age, can significantly affect the flavor profile. These plants tend to produce more green and neutral notes, lacking the depth and complexity that come from fully mature agaves.”
8. Agaves give visual clues when they are ripe
Unlike many crops that follow a strict calendar, agaves signal their maturity through specific physical transformations known to experienced harvesters - the jimadores.
Several cues are read by these workers, according to Camarena:
“There are several indicators of agave maturity that a jimador looks for in the field. One key sign is when, in addition to having a big piña, the central leaves begin to shorten rather than being the tallest — this indicates the plant has reached full maturity.
Another indicator is the appearance of reddish spots on the piña, similar to how a banana develops brown speckles as it ripens. These signs of maturity often translate into greater complexity in the resulting tequila.
Leaf color is also important. An agave that is not yet fully mature tends to show a more intense blue-green color, whereas a fully mature plant shifts toward a more yellow-green tone in its pencas.”
Real also mentions that an in-the-field test for sugar level is often used as the definitive sign that agaves are ready for harvest. But sometimes, the field matures unevenly.
Says Cruz: “In a given plot, some agaves may be observed to have higher sugar content or clearer signs of maturity, you can harvest only the plants that show these characteristics; this selective harvest is called “entresacado.”
9. The “shave” of the agave affects the flavor of the tequila
Every agave is trimmed and harvested BY HAND. It’s a lot of work, using a supremely sharp tool - the coa.
The level of the "shave" - how closely a jimador trims the green leaves (pencas) from the heart - is a critical flavor lever for the distiller.
Image from Flickr user Omarsan - Creative Commons
Katrina Rojo, maker of El Viejito, El Bandido Yankee, and other brands, explains: “When more green penca (leaf base) is left attached to the piña, higher concentrations of vegetal compounds, chlorophyll residues, and certain bitter polyphenols can remain. These elements may translate into more herbaceous, earthy, and sometimes slightly bitter notes in the finished tequila.
A cleaner cut — particularly a precise or “double jima” — removes most of the green material and focuses primarily on the heart of the agave, where fermentable sugars are concentrated. This generally results in a cleaner, sweeter, and more refined profile, allowing cooked agave, caramelized sugars, and floral notes to shine through.”
Cruz says there are three standard heights of jima (shave), measured by how much leaf is left when trimming:
“When the jima height is zero inches (totally shaved), the sensory profile is more neutral. At a height of one inch (very common in the industry), you get smooth, sweet, citrus, and fruity profiles. At two inches, we get fuller-bodied profiles with more raw agave aftertaste and herbal and floral notes.”
The Blue Weber agave is far more than just a raw ingredient; it is a biological marvel that demands years of patience, environmental stress, and expert human intervention to reach its peak. By understanding the unique lifecycle and characteristics of this resilient succulent, we can better appreciate the depth, terroir, and tradition poured into every glass of tequila.
El Ateo, Tequila Ocho, Alma del Jaguar, Tierra de Ensueño, Tequila Arriesgado are all Tequila Report partners
About the Author
Jay Baer has spent 30+ years studying tequila and agave spirits. He is the co-founder and editor of The Tequila Report. Jay is also the New York Times bestselling author of seven books, a Hall of Fame keynote speaker, and has spent three decades building and advising brands.
In addition to The Tequila Report, Jay and his business partner, Maddie Jager, are co-founders of Slingshot, an invitation-only community of emerging tequila brands. Jay lives in Bloomington, Indiana and Puerto Vallarta, Mexico. You can find him on Instagram.
