From Seed to Drink: How Yerba Mate Is Made

May 30, 2026

Time to Read: 7 minutes

Quick Overview

The mate in your gourd took years to get there. From planting and harvest through drying, aging, and blending, producing yerba mate is a slow, careful process that takes at least five years from seed to drink. Here is the whole journey, step by step.

In this article, you'll learn:

How long it takes to produce yerba mate
Where and how it grows
When and how it is harvested
How it is dried, aged, and blended

Yerba mate has been part of life in South America for hundreds, if not thousands, of years, as we covered in our article on the history of yerba mate. Along the way, communities developed their own ways to grow, harvest, and process it.

Technology has made the whole process more efficient, but historian Javier Ricca argues that mate's taste, aroma, and quality have not necessarily improved. In his view, the mate we drink today is about as flavorful as what Indigenous communities enjoyed in the 16th century and earlier.

How is yerba mate planted?

Young yerba mate plants growing in a field. — Yerba mate plants spend their first year in a nursery before being planted out.

In Spanish, “yerba” sounds a lot like “hierba,” meaning herb, but yerba is really the dried, toasted, shredded leaf of a tree that can reach 10 meters tall. Ilex paraguariensis grows naturally in Brazil, Argentina, and Paraguay, between roughly 10 and 30 degrees latitude, across an area of about 540,000 square kilometers. It needs steady high humidity, warm and constant temperatures, and rich, well-drained soil.

Early growers noticed the seeds would not germinate if simply planted. They sprouted more easily after passing through the digestive systems of birds, so at first growers encouraged this by keeping certain birds. Over time they recreated the effect by repeatedly washing the seeds and soaking them in warm water before planting in fertile, very humid soil.

Today, young plants spend their first 9 to 12 months in nursery gardens, then are transferred to the soil. They cannot be harvested until their fourth year, and it is not until the seventh or eighth year that they produce enough leaves to be commercially worthwhile. If you want to try it yourself, see our guide on how to grow a yerba mate tree.

When is yerba mate harvested?

Close-up of a yerba mate plant's leaves. — Harvest timing depends on humidity, altitude, and temperature.

Humidity, altitude, and temperature all shape the best time to harvest. According to Gustavo Peckolz, that window runs from March to September in Paraguay and Mato Grosso, from January to September in Paraná and Santa Catarina, from April to June in Argentina's Misiones region, and from March to July across the rest of Argentina and Rio Grande do Sul.

Harvesting is usually done by hand, with handsaws, machetes, or scissors (electric scissors make it faster and less tiring). The leaves are collected onto tarps and sorted by size and quality, then quickly moved to the next stage.

How is yerba mate dried? (sapecado and fogueado)

Sapecado and fogueado are the two drying-and-toasting stages. Sapecado is crucial and must happen within 24 hours of harvest, because the moment leaves are picked they start to oxidize and lose color, aroma, and taste. To stop that, the leaves get a very quick blast of high heat. The fire has to be carefully controlled, since too much heat burns the leaves and smoke can taint their flavor.

A poorly done sapecado produces a brown-and-yellow yerba, historically sold cheaply and used for mate cocido. The best, strongest yerba has a deep, uniform green color and a distinctive aroma. After sapecado comes fogueado, where the leaves are spread on belts or racks and exposed to hot air of 80 to 100 degrees Celsius (176 to 212 Fahrenheit) for 2 to 12 hours. After this double drying, now usually done with gas or electricity, the yerba has lost about 80% of its moisture. We go deeper on this in smoked vs unsmoked yerba mate.

Canchado: the first grinding

Canchado refers to both the process and the result of a first, coarse grind. The dried leaves are cut into rough squares of about one square centimeter, which makes them easier to bag and transport.

Aging and maturation

The bagged yerba is then stored in chambers where temperature, humidity, and light are controlled. Much like wine, yerba mate needs a controlled environment to age properly and develop a rounder, richer character, and this maturation helps it hold its quality until it is bought and brewed. Sources differ on the minimum time, from 9 months to 2 years, but they agree that longer is generally better.

The final grind and the blend

In the last stage, the yerba is ground again, this time much finer, from near dust to a couple of millimeters. It is then sorted by type, age, and size and mixed with dried stems, and sometimes herbs, to create each brand's blend. In the early 20th century, shopkeepers used as many as 18 categories based on dryness and leaf size. Today, every brand blends and labels its own mixes based on the proportion of leaf, stem, dust, and any additives, which together define the taste, aroma, and color.

The most basic classification is the presence or absence of stems. With stems, it is at least 65% leaf and no more than 35% stems, which drinks milder. Without stems (despalada) it is at least 90% leaf, which drinks stronger. If you are choosing, our guide to choosing your first yerba mate can help.

Testing and tasting

Throughout the process, yerba mate is checked in the lab, and each country has its own rules for controlling production and export. Companies also employ tasters, whose job is to make sure each blend is well balanced and has aged enough to keep its quality over time.

All told, yerba mate production takes at least five years from seed to drink. It is tested, controlled, and takes real skill. If you would like to see it in action, here is a look at the process (in Spanish).

Good to Know

That long aging step is why freshly packed yerba can taste harsher than a well-matured one. If a yerba tastes overly sharp, it may simply be young.

Frequently Asked Questions

How long does it take to produce yerba mate?

At least about five years from seed to drink. Plants are not harvested until their fourth year and do not yield well commercially until the seventh or eighth.

Where does yerba mate grow?

Naturally in Brazil, Argentina, and Paraguay, in warm, humid subtropical regions with rich, well-drained soil.

What are sapecado and fogueado?

The two drying and toasting stages. Sapecado is a quick blast of high heat within 24 hours of harvest to stop oxidation; fogueado is a longer, gentler drying.