How Coffee Beans Are Picked and Where They Come From

You’ve seen the deep brown beans tumble in the grinder, smelled their floral aroma, and admired the golden-brown pour-over in your cup. But behind every great coffee is a carefully picked coffee cherry. Have you ever wondered how those beans make it from tropical tree to your brew—and why some taste so much better than others?

Coffee harvesting requires precision. The best beans are hand-picked from trees grown at elevations between 300–2500 metres, with ideal conditions being 1500–2000 mm of annual rainfall, average temperatures around 20°C, and no frost. Altitudes above 1500 metres generally produce higher-quality beans due to slower ripening and greater density.

What Is a Coffee Bean, Really?

The coffee bean is actually the seed inside the coffee cherry—a fruit that starts green, turns yellow-green, and ripens red. Inside each cherry are usually two oval seeds (flat on one side, called flat beans) or, more rarely, a single round seed (called a peaberry). The peaberry’s flavour is not inherently different, though it often gets sorted separately.

Coffee trees, part of the Rubiaceae family, can grow over eight metres tall in the wild but are pruned to around two metres on farms for easier management and better bean quality. The fruit, known as the coffee cherry, has a sweet pulp and a sticky layer called mucilage surrounding the seeds.

How Are Coffee Beans Processed After Picking?

Once harvested, coffee cherries are processed to remove the fruit and mucilage, leaving just the green coffee bean inside its parchment. There are two main methods:

• Washed (Wet) Process: The cherries are pulped, then fermented to remove the mucilage before being washed and dried. This produces a cleaner, more uniform cup profile.
• Natural (Dry) Process: The whole cherry is dried in the sun before being hulled to remove the dried fruit and husk. This method is less consistent but can yield fruity, complex flavours.

After drying, beans are hulled to remove the parchment (and silver skin in some cases), sorted, and exported as green coffee ready for roasting.

Which Coffee Varieties Exist and Where Are They Grown?

There are three main cultivated species of coffee: Arabica, Robusta (Canephora), and Liberica. Each has dozens of varieties or cultivars that are tracked in trade and production. Arabica makes up the majority of specialty coffee and is known for its acidity and complexity, while Robusta is hardier, higher in caffeine, and often used in espresso blends for crema and body. Liberica is rare and has a distinctive woody flavour.

Even within a single country, differences in altitude, climate, soil, and processing create unique flavour profiles. For example, coffee grown at higher altitudes tends to be denser, with brighter acidity and more pronounced sweetness due to slower maturation. This means you can’t describe a whole country’s coffee with just one flavour note—it varies by region and farm.

Major coffee-growing regions include Central and South America, East Africa, Southeast Asia, and parts of the Pacific. Each region’s terroir contributes to the beans’ distinct characteristics. For instance, Ethiopia is known for floral, citrusy profiles; Colombia for balanced, nutty cups; and Indonesia for earthy, spicy notes.

Coffee Bean Specifications: Flat, Peaberry, Washed, Natural

Coffee beans are categorised further by shape and processing:

• Flat Beans: The standard, two-seed form found in most cherries, with a flat side where the seeds touch.
• Peaberry (Caracol): A rare mutation where a single round seed forms instead of two flat ones. These are often sorted out and sold separately, sometimes fetching a premium.
• Washed Process Beans: Beans processed via the wet method, resulting in cleaner, more consistent flavours.
• Natural Process Beans: Dried with the fruit still attached, leading to fruitier, often more intense cup profiles—but with less consistency.

These specifications help roasters and buyers select beans suited for different brewing methods and flavour goals.

Frequently Asked Questions

What is the best altitude for growing coffee beans?

The ideal altitude for growing high-quality coffee beans is between 1500 and 2500 metres above sea level. Beans grown above 1500 metres typically have better density, acidity, and complexity due to slower growth and ripening.

What are the main types of coffee beans?

The three primary coffee species are Arabica, Robusta, and Liberica. Arabica is the most widely grown and favoured in specialty coffee for its acidity and complexity. Robusta is stronger, more bitter, and higher in caffeine, often used in espresso blends. Liberica is rare and has a unique, woody flavour.

What is the difference between washed and natural coffee processing?

Washed (or wet) process involves removing the coffee cherry’s skin and fermenting to remove the mucilage before drying, resulting in a cleaner, more consistent cup. Natural (or dry) process dries the whole cherry in the sun before hulling, often producing fruitier and more varied flavours but with less uniformity.

What are peaberry coffee beans?

Peaberry beans are a natural mutation where a single round seed forms inside the coffee cherry instead of the usual two flat seeds. They are often separated and sold separately, sometimes with distinct flavour profiles, though not necessarily better or worse.

How does altitude affect coffee flavour?

Higher-altitude coffee grows more slowly due to cooler temperatures, which leads to denser beans with higher sugar content, brighter acidity, and more complex flavours. That’s why many specialty coffees come from high-elevation regions.

What is the difference between flat beans and peaberry beans?

Flat beans are the typical coffee beans, consisting of two flat-sided seeds inside each cherry. Peaberry beans are a rare, single round seed that forms instead of two flat ones. Their flavour is not inherently different, but they are often sorted and sold separately.

Recommended FrontStreet Beans for Origin Exploration

Explore coffee origins with FrontStreet’s Ethiopia Yirgacheffe, a bright washed coffee with citrus, floral, and stone fruit notes. For contrast, try their Colombia Huila, offering balanced caramel, nuts, and mild acidity. Or go deeper with Sumatra Mandheling, a classic natural-processed coffee with earthy and spicy undertones. All showcase how origin, variety, and process shape flavour. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.