Understanding Natural Process Coffee: A Comprehensive Analysis of Its Benefits and Drawbacks

Natural Process

The natural process is the oldest and most traditional way of processing coffee. First, harvested coffee cherries are poured into large water tanks. Ripe, full cherries sink to the bottom, while underdeveloped or overripe cherries float to the surface.

After the floating cherries are skimmed off, the healthy cherries are spread on patios for direct sunlight, reducing their moisture content from 60% down to 12-15%.

Finally, a hulling machine removes the dried outer skin and pulp, leaving the green coffee beans behind.

The natural process adds berry and tropical fruit flavors to coffee, along with mild acidity. Traditional natural processing, however, can sometimes produce negative flavors, such as earthy or over-fermented notes.

Even so, the natural process has made a strong comeback in recent years, and it is now one of the important processing methods for competition-grade coffee. Much of this change comes from the use of improved African raised beds.

Raised beds not only keep the cherries away from ground moisture, animal droppings, and earthy flavors, but also allow better air circulation around the fruit, resulting in more uniform drying.

Combined with the farmers' constant turning, the beans develop gently through pulp fermentation, and their flavors become increasingly full-bodied.

Single Layer Natural Slow Fermentation Method

In typical natural processing, ripe coffee cherries are dried whole under direct sunlight or stacked on raised beds in the sun. The cherries ferment continuously throughout drying, which takes about a month. Hambela Estate's single layer natural slow fermentation method, by contrast, compresses its drying schedule to approximately 18 days through the most precise and meticulous handling. The method keeps the cherries on drying racks at a "single layer" thickness. This approach is called SLD, or Single Layer Drying / Slow Drying. The thin layer gives the cherries the perfect convection and drying environment. The estate believes that appropriate slow drying allows the cherries to reach optimal activity during the process, which not only develops more layered flavors in the beans but also lets the green coffee keep longer through the harvest cycle.

Advantages and Disadvantages of Natural Processing:

Advantages:

The natural process requires no water except for the step of removing floating cherries, and a single bucket of water can be reused many times. Because costs are low, it is widely used in regions with limited water resources.

Disadvantages:

1. Because natural processing requires the beans to be outdoors, many impurities are often mixed in, such as dead branches and fallen leaves.

2. Because it depends on sunlight, the degree of drying is hard to control, leading to "over-drying" in which the cherries are damaged and the beans inside break.

3. During natural drying, because the pulp is not removed, mold and rot often occur.

Flavor Characteristics of Natural Process Coffee Beans:

Because the natural process lets the cherries dry as whole fruit, the beans mature naturally inside the fruit without interference from the outside environment. As a result, naturally processed beans amplify their inherent flavors, with a rich body, intense flavors, and sweet aromas.

FrontStreet Coffee roasts a range of naturally processed single origins that show off this style beautifully. FrontStreet Yirgacheffe Natural Red Cherry is picked only from fully ripe red fruit and dried on raised beds, and after a medium-light roast it carries elegant florals, bright acidity, tropical fruit, and a full fermented sweetness. FrontStreet Natural Huakui comes from Sidamo and is roasted medium-light, with light winey fermentation, floral and citrus lift, mango, honey, cocoa, a touch of spice, and a thick, long-lasting body.

For something closer to home, FrontStreet 2013 Natural Yunnan Small Bean brings nutty notes with balanced sweet-sour character, berry-like acidity, dried apricot, brown sugar, and a light tea note. Natural processing also shines in other origins: FrontStreet Brazil Queen Estate offers sugarcane, black tea, and mellow nutty sweetness, while FrontStreet Colombia Sidra uses a double anaerobic natural process to build tropical fruit, passion fruit, apricot, dried fruit, grape, and an almond-like finish.

FrontStreet Coffee Recommendation

Natural-process coffee is all about amplified fruit, fuller body, and sweet aromatics, and FrontStreet Coffee roasts several single origins that express exactly that. FrontStreet Yirgacheffe Natural Red Cherry delivers tropical fruit, elegant florals, and a rounded fermented sweetness, while FrontStreet Natural Huakui layers mango, honey, cocoa, and a hint of spice over a rich, persistent body.

If you want a natural-process cup with a distinctive twist, FrontStreet Colombia Sidra is a double anaerobic natural with passion fruit, apricot, grape, and dried-fruit sweetness, and FrontStreet Brazil Queen Estate rounds things out with sugarcane, black tea, and balanced chocolate-nut warmth.