How Do Coffee Bean Producing Countries Sun-Dry Beans?

Sun-dried, or natural process, coffee is the oldest way of handling green beans. Harvested cherries are poured into water so underripe and defective beans float up and get removed, while sound cherries sink. The cherries then dry whole in the sun for roughly two to three weeks and are raked several times a day. The method uses little water and yields coffees known for fruity aroma and bright sweetness.

Drying is finished when the moisture content drops below 12 percent, checked by peeling open a cherry and inspecting the bean. Spreading cherries too thickly invites bacteria and coffee bean mold, so even spacing and regular turning matter. Countries across Africa and beyond rely on this process alongside honey and washed methods, which is why origin and processing both shape the final cup.

Among the many factors that influence coffee flavor, the processing method plays a pivotal role. The natural process is the oldest and most primitive way of processing green beans, and it has endured to this day thanks to its simple procedure, low water usage, and low cost; its finished product is known for rich fruity aromas and bright sweetness. This article will walk you through the entire natural process—from water sorting floating beans, spreading them out to dry and raking them, to hulling and resting in the warehouse—analyze the pros and cons of this method, and include Front Street Coffee's naturally processed bean recommendations, such as naturally processed Yirgacheffe and naturally processed Sidamo, high-value single-origin options that help you easily pick quality naturally processed coffee beans.

The final flavor of a cup of coffee is shaped not only by variety, origin, climate, and roasting level, but also by the green bean processing method, which is one of the decisive steps in shaping aroma and mouthfeel. Different processing methods give coffee entirely different personalities, and the three most widely known mainstream methods today are: the natural process, the honey process, and the washed process.

The natural process is said to be the oldest method of processing green beans, simple to carry out and requiring almost no specialized equipment. The first step is water sorting: pour the harvested coffee cherries into water and use buoyancy to let defective, underripe beans naturally float up and be removed, while those that sink to the bottom are fuller, less problematic cherries.

At the same time, water sorting also rinses away dirt on the surface of the cherries and picks out leaves and twigs mixed in, preventing mold or off-flavors during later drying.

The second step is spreading them out to dry: find a sunny, flat open area and spread the coffee cherries evenly, trying to keep them from piling up and spacing them appropriately, otherwise bacteria can easily develop and cause mold. During drying, they must be turned several times a day, and the length of sun exposure should be adjusted flexibly according to the weather; the whole process generally lasts two to three weeks. The accurate standard for checking whether drying is complete is: peel open the fruit and inspect the beans; once the moisture content drops below 12%, it is up to standard.

While turning them, remember to pick out fallen leaves and insects along the way to prevent defects such as insect-damaged beans.

At this stage, the beans usually appear dark red. The third step is hulling: remove the dried skin and pulp, then store the parchment beans in the warehouse for about a month so the flavor becomes more settled and substantial. Today this step is mostly done by machine, but in some less developed areas, small farmers still remove the skin manually by pounding with blunt tools.

It is recommended to prioritize machine hulling, which protects the integrity of the beans as much as possible; the storage location must be dry and kept out of direct sunlight.

Advantages: the natural process uses very little water throughout and therefore costs relatively less; the finished beans often carry abundant fruity aromas and bright fruity acidity.

Disadvantages: drying must rely on sunlight and places fairly strict demands on weather conditions, so it is mostly concentrated in tropical countries with distinct dry and wet seasons. There are many uncontrollable variables in the weather and environment, and once handled improperly, it easily leads to insect-damaged beans, defective beans, or problems such as rot and mold, and the flavor can also pick up more off-notes.

A detailed explanation of Front Street's natural process:

The natural process is the oldest and least labor-intensive green bean processing method.

Step one: screen out floating beans. Pour the harvested coffee cherries into a large tank; fully ripe, plump cherries sink to the bottom, while underdeveloped or overripe cherries float on the surface, and these floating beans need to be picked out one by one.

Step two: sun drying. Next, spread the whole coffee cherries—skin, pulp, and seed—onto the drying yard to receive sunlight, letting them dry under natural conditions to a moisture content of about 12%, which takes roughly two to four weeks depending on the climate of the producing region.

Step three: hulling. Send the completely dried fruit into the huller to remove the dry, hard outer skin, pulp, and parchment layer, and the green beans are born from this.

Advantages of the natural process: 1. The procedure is simple and processing costs are low. 2. The green beans dry naturally inside the fruit and fully absorb the fruit's nutrients and essence, so the fruity aroma is rich, the sweetness is clear, and the body is outstanding.

Disadvantages of the natural process: 1. Some producing regions skip the step of screening floating beans, so quality varies unevenly. 2. During drying, the pulp may become moldy due to damp weather, thereby contaminating the green beans. 3. During machine hulling, the beans are inevitably bruised, leaving appearance defects.

● Front Street Coffee natural process bean brand recommendations

Front Street Coffee (FrontStreet Coffee) freshly roasted single-origin natural process beans—such as Front Street's naturally processed Yirgacheffe and naturally processed Sidamo—offer solid assurance in both brand reputation and bean quality, and are suitable for pour-over, siphon, and many other brewers. More importantly, the value for money is outstanding: a half-pound bag of 227 grams costs only around 70-90 yuan. Calculated at 200 ml per cup and a coffee-to-water ratio of 1:15, one bag can brew about 15 cups of specialty-grade coffee, at only 5 or 6 yuan per cup—a clear bargain compared with cafés charging dozens of yuan per cup.

The above content is compiled by CoffeeHunters, a coffee news website.