How Coffee Cherries Become Green Beans: Processing, Drying & Sorting

Ever wondered how the coffee you brew starts life? Before it’s roasted, ground, or brewed, every coffee bean begins as a fruit—specifically, a coffee cherry, bright red and clustered on tree branches. But getting from that sweet, ripe fruit to the green beans in your bag involves a carefully managed sequence of harvests, removals, and drying stages. Here’s how it really works.

Coffee cherries turn bright red when ripe and are usually picked once a year, either by stripping all fruits from branches or selectively choosing only ripe ones—a more labor-intensive method reserved mostly for high-quality Arabica. After picking, the real transformation begins with one of two main processing methods: natural (sun-dried) or washed (wet).

What Is a Coffee Bean, Really?

That ‘bean’ you grind is actually the seed of a coffee cherry—a fruit with layers. The outer skin (exocarp) is thick and bitter. Beneath it lies the sweet, grape-like pulp (mesocarp). Next is a sticky, honey-like layer called the parenchyma. The coffee seeds are encased in a parchment-like inner skin (endocarp), and finally, each green bean is coated with a thin silvery film called the silver skin. Most cherries hold two beans, though some have just one—called a peaberry.

When and How Are Coffee Cherries Picked?

Coffee is typically harvested once a year. In the Northern Hemisphere, that’s between September and March; in the Southern Hemisphere, it’s April to May. Most cherries are picked by hand—either all at once (strip picking) or selectively (picking only fully ripe fruit), with the latter preferred for premium Arabica.

How Coffee Cherries Are Processed: Natural vs. Washed Methods

Once picked, the coffee cherries must be processed to remove everything but the bean. There are two main ways to do this:

Natural (Sun-Dried) Process

The simplest and most economical method: whole ripe cherries are spread out in the sun on patios or raised beds. Workers rake them regularly to ensure even drying over seven to ten days. The goal is to reduce moisture content to around 11%. As they dry, the skins turn yellowish, and you can hear the beans rattle inside.

Washed (Wet) Process

In contrast, the washed method removes the fruit pulp and mucilage from the beans within 24 hours of harvest. This is done using a depulper, then the beans are fermented in tanks for 12 to 48 hours to break down the sticky layer. After fermentation, the beans are either sun-dried or machine-dried.

Drying, Sorting, and Exporting Green Coffee

After drying, all remaining layers—the husk, parchment, and silver skin—are removed in a step called hulling. Some producers also use specialized machines to remove any leftover silver skin. The beans are then sorted by size and density using vibrating screens or air blowers that separate lighter (often defective) beans from heavier, higher-quality ones.

What leaves the farm isn’t roasted coffee—it’s green coffee. These unroasted beans are packed into jute or hessian sacks, or large plastic shipping containers. Globally, around 7 million metric tons of green coffee are shipped every year.

Frequently Asked Questions

What does a coffee bean look like inside the cherry?

Inside each bright red coffee cherry are usually two green coffee beans, covered by a sweet pulp, a sticky mucilage layer, a parchment-like husk, and a thin silvery skin. Some cherries contain just one round bean called a peaberry.

How are coffee cherries harvested?

Coffee cherries are typically picked once a year, either by hand-stripping all fruits from branches (strip picking) or selectively choosing only ripe, red cherries (selective picking)—the latter is more common for high-grade Arabica.

What is the difference between natural and washed coffee processing?

Natural processing dries whole coffee cherries in the sun for 7–10 days until moisture drops to 11%. Washed processing removes the cherry pulp within 24 hours, then ferments the beans before drying them.

How long does coffee drying take?

Sun-drying coffee cherries (natural process) takes about 7 to 10 days. Machine or sun-drying washed beans may take longer depending on climate and equipment, often up to several weeks under controlled conditions.

Why are coffee beans dried after processing?

Coffee beans are dried to lower their moisture content to around 11%, preventing mold and spoilage during storage and transport. Proper drying is essential for quality preservation before roasting.

What happens after coffee is dried?

After drying, beans are hulled to remove all outer layers, sorted by size and weight, and packed as green coffee in jute sacks or containers for global export. They are not roasted until reaching the roastery.

Recommended FrontStreet Beans for Natural Process Lovers

Explore the bold fruitiness of natural-processed coffees with FrontStreet’s Ethiopia Yirgacheffe Red Cherry, a bright, juicy cup with tropical fruit and fermentation notes, roasted light to highlight its floral acidity and sweetness. For something richer, try the Ethiopia Humbera, a high-altitude Ethiopian with layered citrus, mango, and honey sweetness thanks to its traditional sun-dried method. Or go for Brazil Queen Manor, a nutty, chocolatey bean dried on raised beds to bring out smooth body and candied sugar tones. All showcase the unique depth that natural processing adds. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.