From Coffee Fruit to Green Bean: The Full Process

Ever wondered how your coffee beans started life? Before that espresso shot or pour-over, each green bean began as a fruit on a tree—going through harvest, removal of pulp, and careful drying or washing. The journey from cherry to cup begins long before roasting.

A single coffee tree yields just 3–5 kilograms of fruit, and only about 20% of that—roughly 0.6–1 kg per tree—becomes usable green coffee beans. That’s a lot of work for a small harvest.

The Three Main Coffee Species

Most of the world’s coffee comes from just three species, each with distinct traits:

• Arabica: Makes up around two-thirds of global production. Grown best in mild climates—not too hot, cold, wet, or dry. Its oval, flat beans produce complex, high-quality flavors with rich aromas.
• Robusta: Has a harsh, bitter taste with little acidity or aroma. Often used in blends for instant, frozen, and canned coffees. Easier to grow in lowlands, resistant to disease, and grows faster—but lacks refinement.
• Liberica: Rare variety with both low yield and quality. Mainly exported to Europe.

Flat vs. Peaberry Beans

Inside each red coffee cherry are layers protecting the seeds—or beans. Most cherries hold two beans facing each other, creating the common flat bean. But about 5% of the time, a cherry produces a single round bean: the peaberry (or caracolillo). These beans often roast and brew differently, sometimes offering more intense or unique flavors.

From Harvest to Green Bean: Two Processing Methods

After picking, every coffee cherry must be processed to remove everything but the bean inside. This includes the skin, pulp, parchment , and silver skin. There are two main ways to do this: natural (dry) processing and washed (wet) processing.

Natural (Dry) Process

This traditional method is simple but weather-dependent:

• Cherries are spread out on large drying surfaces under the sun.
• They’re turned regularly for 1–2 weeks until fully dry—you can hear the beans rattle when shaken.
• Finally, a hulling machine removes all outer layers to reveal the green bean.

The result? A cup with softer acidity and mellow bitterness. Countries like Brazil, Ethiopia, and Yemen commonly use this method. However, it’s vulnerable to contamination and defects due to reliance on good weather, so careful sorting before export is essential.

Washed (Wet) Process

A more controlled, cleaner method used in over 70% of global production:

• Cherries are first sorted in water tanks—the unripe or damaged ones float and are removed.
• The ripe ones go to a pulper that strips off the skin and pulp.
• The beans (still coated in sticky mucilage) are soaked in water tanks, then moved to fermentation tanks for half a day to a full day. Fermentation breaks down the mucilage.
• After washing off the fermented layer, beans are either sun-dried or machine-dried.
• Finally, a huller removes the parchment to produce the clean, green coffee bean ready for export.

This method results in brighter acidity, fewer defects, and a cleaner cup. Popular in Colombia, Mexico, and Guatemala. However, poor fermentation control can create off-flavors like sourness or fermentation taints—but when done right, it highlights unique flavor profiles.

Shipping the Green Beans

Once processed, the green beans are packed into sacks or special containers. At this stage, they’re stable enough for global transport to roasters everywhere.

Frequently Asked Questions

How many coffee beans come from one coffee tree?

A single healthy coffee tree typically produces 3–5 kilograms of coffee cherries per harvest, but only about 20% of that weight becomes green coffee beans—roughly 0.6 to 1 kilogram per tree.

What’s the difference between arabica, robusta, and liberica?

Arabica makes up two-thirds of global coffee production and is known for its complex flavors and aromas, but is sensitive to growing conditions. Robusta is bitter, low in acid, and often used in commercial blends like instant coffee; it’s hardier and grows at lower altitudes. Liberica is rare, with low yield and quality, and is mostly exported to Europe.

What are flat beans and peaberry beans?

Most coffee cherries contain two flat beans lying side by side. Occasionally, a cherry produces a single round bean called a peaberry. Peaberries often have distinct flavor profiles and are prized by some roasters and drinkers.

What’s the difference between washed and natural coffee processing?

Washed (wet) processing removes the cherry’s pulp and mucilage before drying, resulting in a cleaner, brighter cup with higher acidity. Natural (dry) processing dries the whole cherry in the sun before hulling, often producing a sweeter, fruitier, but softer cup. Washed accounts for about 70% of global production.

How are green coffee beans shipped?

After processing, green beans are dried and hulled, then packed into sacks or containers for transport to roasters and markets around the world.

Recommended FrontStreet Beans for Process Study

Explore the impact of processing with FrontStreet Coffee’s Yirgacheffe (natural) for fruity, winey notes from dry processing, and Guatemala Antigua (washed) for bright acidity from traditional washed methods. For something different, try the peaberry-focused Kenya AA, known for intense sweetness and complexity. All highlight how processing shapes flavor. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.