Types of Coffee Trees and Main Coffee Varieties

If you’ve ever sipped a Kenyan AA or savored a Jamaican Blue Mountain, you’ve tasted the fruit of one of hundreds of coffee tree species—but chances are, it came from just one kind. With over 500 coffee plant species and 6,000 varieties worldwide, how do you know which ones actually end up in your cup? And why do some taste bright and sweet while others are bitter and harsh? Here’s the breakdown.

There are four main coffee tree species globally, but only two—Arabica and Robusta—are widely grown for high-quality commercial coffee. Arabica makes up about 70% of global production, while Robusta accounts for 20–30%. The other two, Liberica and Excelsa, are far less common and rarely sold as specialty beans.

What Are the Four Main Coffee Tree Species?

The coffee plant family includes four primary species: Arabica, Robusta, Liberica, and Excelsa. Among these, only Arabica and Robusta are cultivated at scale for commercial coffee production. Arabica beans are prized for their balanced flavor and lower caffeine, while Robusta is more bitter, higher in caffeine, and mostly used in instant coffee. Liberica and Excelsa are rare, with limited global production and market presence.

Arabica Coffee: The World’s Favorite Specialty Bean

Arabica (Coffea arabica) accounts for around 70% of the world’s coffee production. Its beans are small, oval-shaped with a long, narrow center crease and a relatively flat back. Arabica coffee thrives at high altitudes, typically between 600 and 1,800 meters, in regions with average temperatures around 20°C, steady rainfall, and no frost. The best Arabica grows on sloped land within 160 km of the equator, and harvesting requires manual labor due to the terrain.

Key characteristics of Arabica include:

• Smaller, oval beans with a curved crack and flat back
• Lower caffeine content (about half that of Robusta)
• More delicate, nuanced flavors with higher acidity
• Requires specific climate: mild days, cool nights, high elevation
• Grown in countries like Ethiopia, Colombia, Brazil, Jamaica, and Yemen

Notable Arabica coffees include Jamaica Blue Mountain, Yemen Mocha, Colombian Supremo, and Brazil Santos. These beans are celebrated for their balance, sweetness, and complex aromas. Due to the challenging growing conditions, Arabica is more expensive and represents the majority of specialty coffee offerings.

Robusta Coffee: Hardier, Bitter, and Caffeine-Packed

Robusta (Coffea canephora), originating in central and western Africa as well as Madagascar and parts of Asia (notably Indonesia), constitutes about 20–30% of global coffee production. Its beans are larger, rounder on the front with a convex back and a straight crease. Unlike Arabica, Robusta grows well at low altitudes (below 500 meters) and is far more resistant to disease, pests, and harsh weather. It also requires minimal care and can thrive in the wild.

Main traits of Robusta include:

• Larger, rounder beans with a straight crack
• Higher caffeine content (nearly double that of Arabica)
• Bolder, more bitter, and earthy flavor profile
• Grows easily at low altitudes and in hot, humid climates
• Mostly used in instant and low-cost commercial coffee

Most Robusta is consumed in Africa and is commonly used to produce soluble (instant) coffee. While it lacks the refinement of Arabica, its strong flavor and high caffeine make it valued for certain applications, especially where cost and resilience are priorities.

Minor Species: Liberica and Excelsa

Besides Arabica and Robusta, there are two other coffee species: Liberica (Coffea liberica) and Excelsa (often classified under Liberica but now recognized as distinct). These make up a tiny fraction of global production and are rarely found in specialty markets. Liberica, native to West and Central Africa, produces large, irregular beans with a unique smoky flavor but is difficult to cultivate. Excelsa, mainly grown in Southeast Asia, offers tart, fruity notes but remains uncommon.

Why Does Coffee Variety Matter?

The species and variety of coffee bean directly influence flavor, aroma, body, and acidity. Arabica offers a wide range of tasting profiles—from bright citrus and floral notes to deep chocolate and nuts—depending on origin, altitude, and processing. Robusta tends to deliver a heavier body with woody or nutty tones and a strong, sometimes harsh bitterness. Even within the same species, differences in soil, climate, and farming practices yield unique cup profiles. That’s why a Colombian Arabica tastes different from a Yemeni one, and why specialty roasters highlight origin details.

Frequently Asked Questions

What are the four main types of coffee trees?

The four main coffee tree species are Arabica, Robusta, Liberica, and Excelsa. Arabica and Robusta are the only ones widely cultivated for commercial coffee, with Arabica making up around 70% of global production and Robusta about 20–30%. Liberica and Excelsa are rare and seldom used in specialty coffee.

Which coffee species is the most popular?

Arabica is the most popular and widely consumed coffee species, accounting for approximately 70% of global production. It is favored for its balanced flavor, pleasant acidity, and lower caffeine content, especially in specialty coffee.

Why is Arabica more expensive than Robusta?

Arabica is more expensive due to its slower growth at high altitudes, more demanding cultivation requirements, lower yields, and the need for manual harvesting. It also has lower caffeine content and generally produces a more refined, sought-after cup flavor compared to Robusta.

What’s the difference between Arabica and Robusta beans?

Arabica beans are smaller, have a mild and nuanced flavor with higher acidity and lower caffeine, while Robusta beans are larger, bitterer, with a stronger, harsher taste and almost double the caffeine content. Arabica grows at higher altitudes and is more delicate, whereas Robusta is hardier and grown at lower elevations.

Are Liberica and Excelsa coffee beans common?

No, Liberica and Excelsa are not common. They make up a very small percentage of global coffee production and are rarely found in specialty or commercial markets. Liberica has a unique smoky flavor and Excelsa offers tart, fruity notes, but both are difficult to cultivate and not widely used.

Where is Arabica coffee typically grown?

Arabica coffee is typically grown in high-altitude regions between 600 and 1,800 meters, within 160 km of the equator. Major producers include Ethiopia, Colombia, Brazil, Jamaica, Yemen, Guatemala, Costa Rica, and Honduras. It thrives in mild, cool climates with consistent rainfall and no frost.

Recommended FrontStreet Beans for Pour-Over

For exploring classic Arabica profiles, try FrontStreet’s BrazilBourbon for its smooth, nutty body with creamy sweetness; the ColombiaSidra offers tropical fruit complexity with juicy acidity thanks to its Sidra variety and double anaerobic process; and the PanamaGeisha delivers jasmine, citrus, and honey-like brightness with a clean, tea-like finish. All are ideal for pour-over and showcase the diversity within high-quality Arabica beans. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.