What You Need to Know About Specialty Coffee Beans

If you’ve ever wondered how those rich, chestnut-colored beans in your grinder ended up there—or why some coffees taste fruity while others are bold and bitter—you’re not alone. Every coffee bean passes through a long journey before it reaches your cup, shaped by geography, climate, farming, and careful processing.

The global coffee trade relies mostly on just two species—arabica makes up roughly two-thirds of production, while robusta fills out the rest. These beans come from farms mostly between 300 and 2,500 meters above sea level, with ideal conditions including 1,500–2,000mm of rainfall and average temperatures around 20°C.

Where Coffee Grows Around the World

Coffee is cultivated across more than 60 countries, primarily within the “coffee belt” that circles the equator. The largest producer is Brazil, responsible for about 30% of the world’s coffee, followed by Colombia and other Central and South American countries contributing around 60% combined. Africa and the Arabian Peninsula make up about 30%, and the remaining 10% comes from Asia and various islands in the Pacific and Indian Oceans.

While coffee can grow at lower altitudes, beans grown at higher elevations—especially above 1,500 meters—are widely regarded as having better cup quality due to slower maturation and increased complexity.

From Tree to Bean: Varieties and Fruit Structure

Coffee comes from the seeds of the coffee cherry, a fruit that starts as a small white flower and ripens from green to yellow, then red. Each cherry typically holds two oval seeds (flat on one side) that we call flat beans. Some cherries contain just one round seed, known as a peaberry, though these are less common and don’t significantly alter flavor.

There are three main coffee species grown commercially:

• Arabica: Accounts for about 66% of global production. Grows best at higher altitudes, produces elliptical beans with a mild, aromatic, and higher-quality cup profile. It is sensitive to extreme climates and not suited to high heat or heavy rain.
• Robusta (also called Canephora): Makes up much of the remaining third. Grown at lower altitudes, it has a stronger, harsher, and more bitter taste with less acidity. More disease-resistant and often used in instant and espresso blends for body and crema.
• Liberica (or Libericatype): Rare and generally low-yielding, mainly exported to Europe. Not commonly imported to Japan or major specialty markets.

How Coffee Beans Are Processed for Export

Before export, coffee cherries go through one of two main methods to remove the fruit and outer layers, leaving just the green coffee bean inside.

Dry (Natural) Process

In the dry method, freshly picked cherries are spread out in the sun on large patios or raised beds for one to two weeks until they dry completely and make a cracking sound. Then a hulling machine removes the dried husk, pulp, and inner skins. This method is simple and low-cost but weather-dependent, and can allow defective beans to mix in. Most Brazilian coffee, along with beans from Ethiopia and Yemen, are processed this way. The resulting cup tends to have a light acidity and rustic bitterness.

Washed (Wet) Process

The washed method begins by removing the skin and pulp of the cherry using a depulper, then soaking the beans in water tanks where floaters (unripe or damaged cherries) are skimmed off. The beans are then placed in fermentation tanks for half a day to a day to break down the sticky mucilage layer. After fermentation, the beans are washed clean, dried on patios or raised beds for several days, and then hulled to remove the parchment layer. This results in cleaner, brighter-tasting beans with fewer defects. Around 70% of coffee from countries like Colombia, Mexico, and Guatemala is processed this way. When done well, it highlights each bean’s unique characteristics—but poor fermentation can introduce unwanted sourness or fermenty notes.

Once processed, the green beans are packed in jute sacks and shipped worldwide, ready for roasting.

Frequently Asked Questions

What are the main types of coffee beans?

The three primary coffee species are Arabica, Robusta, and Liberica. Arabica accounts for about two-thirds of global production and is known for its nuanced flavors and higher quality. Robusta makes up most of the remaining share, is stronger and more bitter, and is often used in blends and instant coffee. Liberica is rare, with low yields and limited global distribution.

Where is coffee mainly produced?

Coffee is grown in over 60 countries located near the equator, within the coffee belt. The top producers are Brazil (about 30%), followed by Central and South American countries like Colombia (around 10% of global production, with the region making up 60% combined). Africa and the Arabian Peninsula contribute about 30%, and the remaining 10% comes from Asia and various Pacific and Indian Ocean islands.

What is the difference between flat beans and peaberries?

Most coffee cherries contain two flat beans that sit next to each other with a flat side. Occasionally, a cherry produces a single round bean called a peaberry. Peaberries occur naturally but are relatively rare and don’t have a universally different flavor profile from flat beans.

What are the two main coffee processing methods?

The dry (or natural) method involves sun-drying the whole coffee cherry and then removing the dried husk. The wet (or washed) method removes the cherry’s skin and pulp first, then ferments the beans to remove the mucilage before drying. Washed beans are typically cleaner and brighter, while dry-processed beans may have more body and earthiness but are more prone to defects.

At what altitude is the best coffee grown?

The highest-quality coffee is usually grown at elevations above 1,500 meters, though most commercial coffee thrives between 300 and 2,000 meters. Higher altitudes slow the bean’s maturation, leading to denser beans and more complex flavors.

Recommended FrontStreet Beans for Exploring Origins

Explore diverse coffee origins with FrontStreet Coffee’s single origins: try the Ethiopia Yirgacheffe for bright citrus and floral notes, the Colombia Huila for balanced caramel and nuttiness, or the Guatemala Antigua for deep chocolate and spice. These beans highlight how terroir and processing shape flavor. All are high-quality arabicas ideal for home brewing. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.