Where Coffee Actually Comes From: Growing on Trees

You’ve heard coffee is a bean—but have you ever wondered what kind of plant it actually grows on? Many people in China first encounter coffee through instant products like Nestlé, forming the false impression that all coffee tastes bold and bitter. But real coffee comes from a very different source: a small tree or shrub that produces a fruit, not a bean directly.

Coffee is the seed inside a fruit that grows on trees belonging to the genus Coffea. Each coffee cherry typically holds two seeds—what we call coffee beans. That’s the simple, physical truth behind every cup.

The Coffee Tree: Botany and Origin

The coffee plant belongs to the Rubiaceae family, specifically the genus Coffea. It’s classified as either a shrub or small tree, and is native to subtropical regions of Africa and Asia. The part we care about is the seed inside its fruit—the coffee bean, commercially speaking.

There are approximately 25 to 40 known species within the Coffea genus, but only two are widely cultivated: Arabica (Coffea arabica) and Robusta (Coffea canephora, often called Robusta). Arabica accounts for about 75% of global coffee trade and is considered the higher-quality species. These plants are grown in Central and South America, Southeast Asia, and Africa.

What’s Inside a Coffee Cherry?

A typical coffee cherry contains two seeds nestled side by side beneath a layer of sweet, pulpy fruit. These two seeds are what become the familiar green coffee beans after processing and roasting. The outer skin is followed by a layer of mucilage and then the parchment, which protects the two flat-sided beans.

But here’s where it gets interesting—not every cherry holds two beans. In roughly 5% to 10% of cases, only one seed develops fully inside the cherry. This results in what’s called a peaberry (or “caracol” in Spanish).

Peaberries: The Single Seed Anomaly

A peaberry occurs when a coffee cherry’s flower produces just one fertilized ovule instead of two. Instead of two flat beans, you get a single, rounded seed that takes up the entire space inside the fruit. This oval-shaped bean is usually smaller than regular Arabica beans and has distinct flavour characteristics.

Peaberries often exhibit a brighter acidity and more intense flavour profile compared to standard beans from the same batch. They were historically considered lower-grade and were either discarded or consumed locally. Today, however, some roasters market peaberry lots separately, and certain markets have begun to prize them as a unique offering.

During post-harvest sorting, peaberries are separated out due to their different size and shape. Though once overlooked, they’re now recognised by specialty buyers for their potential quality.

From Tree to Bean: Key Facts at a Glance

• Coffee is the seed of a fruit that grows on tropical trees or shrubs in the genus Coffea.
• The two main commercial species are Arabica (75% of trade) and Robusta.
• A normal coffee cherry contains two seeds (flat beans) but 5–10% have just one round seed: the peaberry.
• Peaberries develop when only one ovule is fertilized and may have a more vibrant acidity.
• Peaberries are now sometimes sold separately and appreciated for unique flavour traits.

Frequently Asked Questions

What kind of plant does coffee come from?

Coffee comes from the Coffea plant, which is a shrub or small tree belonging to the Rubiaceae family. The coffee plant is native to subtropical parts of Africa and Asia and produces a fruit called the coffee cherry.

How many coffee beans are in a coffee cherry?

Most coffee cherries contain two coffee beans, which are the seeds found inside the fruit. These beans are flat on one side and grow side by side.

What is a peaberry coffee bean?

A peaberry is a single, oval-shaped coffee bean that forms when only one seed is fertilized inside a coffee cherry. Normally, cherries have two beans, but in 5–10% of cases, one rounded bean develops instead.

Does a peaberry taste different?

Yes, peaberries often have a distinct flavour profile, frequently showing brighter acidity and more intense taste compared to regular flat beans from the same batch. Some coffee drinkers and roasters consider them special.

Why are peaberries separated during processing?

Peaberries are smaller and rounder than regular beans, so they’re sorted out during post-harvest processing. They used to be discarded, but now they’re often sold separately due to their unique qualities.

Which coffee species is most common in the world?

Arabica (Coffea arabica) makes up about 75% of global coffee production and trade. It is widely considered to produce higher-quality coffee compared to Robusta.

FrontStreet Coffee Beans That Grow on Trees

Explore the origins of your coffee with FrontStreet’s single origins grown on actual coffee trees. The Ethiopia Yirgacheffe offers bright citrus and floral notes, a classic high-grown Arabica profile. For something more juicy and tropical, try Kenya Little Tomato with its winey acidity and berry sweetness. Both are picked from cherry-bearing trees and processed to highlight their unique fruit flavours. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.