What You Need to Know About Coffee Trees

Ever wondered why your morning cup of coffee tastes the way it does? The answer starts long before roasting—with the coffee tree. Grown in specific climates, shaped by elevation, soil, and rainfall, the journey from tree to cup involves precise natural conditions. Whether you're a curious drinker or a home roaster, knowing how coffee trees grow helps you understand your beans better.

Coffee trees are evergreens native to Ethiopia, classified under the Rubiaceae family, and the ‘beans’ we roast are actually seeds inside bright red fruits called coffee cherries. To grow quality coffee, specific environmental factors—like temperature, rainfall, and altitude—are essential.

Where Coffee Trees Come From

The coffee tree originated in Ethiopia, Africa. Botanically, it belongs to the Coffea subgenus of the Rubiaceae (or madder) family. Though commonly called a bean, the part we roast and brew is actually the seed of the coffee fruit. This seed sits inside a cherry-like fruit and only earns the name ‘coffee bean’ due to its shape.

Ideal Growing Conditions for Coffee Trees

Coffee trees thrive only in tropical or subtropical climates, specifically within the region known as the Coffee Belt—between 25° north and 25° south latitude. However, location alone doesn’t guarantee quality. The best coffee requires a complex mix of environmental factors:

• Temperature: Steady between 15–25°C year-round
• Rainfall: 1500–2000 mm annually, timed to coincide with flowering
• Soil: Well-drained, fertile, ideally volcanic
• Sunlight: Filtered light—direct sun can hinder growth, so shade trees are often planted
• Altitude: Optimal elevation between 500–2000 meters

These conditions affect not just growth, but also the eventual flavor profile of the coffee. Even the method of harvesting and processing plays a crucial role in bean quality.

How Coffee Cherries Develop

A coffee tree typically flowers for the first time around three years after planting. The flowers are small, white, five-petaled, and strongly scented like jasmine. They grow in dense clusters and fall off after two or three days. Several months later, the tree begins to bear fruit.

The coffee fruit is a drupe, roughly 1.5 cm in diameter. It starts green, turns yellow, and ripens to a bright red—similar to a cherry—earning the nickname ‘coffee cherry.’ This is the point at which the fruit is ready for harvest.

Inside each coffee cherry are two seeds (the actual coffee beans), which sit facing each other in a flattened formation. Each bean is encased in a thin membrane called the silverskin (or epidermis), surrounded by a yellowish layer known as the parchment (or endocarp). The entire bean is embedded in a sweet, sticky, gelatinous pulp—the fruit’s flesh—which is soft and edible. The outermost layer is the cherry’s skin or husk.

Frequently Asked Questions

What is a coffee tree and where does it come from?

A coffee tree is an evergreen plant native to Ethiopia, belonging to the Rubiaceae family. It produces the cherries from which coffee beans are harvested. Though called beans, these are actually the seeds of the coffee fruit.

What is the coffee belt?

The coffee belt refers to the region between 25 degrees north and 25 degrees south of the equator, where the climate is suitable for growing coffee. Not all areas within this zone produce high-quality coffee, however.

What conditions are best for growing coffee trees?

Ideal conditions include temperatures between 15–25°C, annual rainfall of 1500–2000 mm timed with flowering, well-drained and fertile (preferably volcanic) soil, filtered sunlight, and altitudes between 500–2000 meters.

What does a coffee cherry look like and how does it develop?

A coffee cherry is a small, round fruit about 1.5 cm in diameter. It starts green, turns yellow, then ripens to red. Inside are two coffee beans, surrounded by sweet pulp and protective layers including silverskin and parchment.

Why do coffee trees need shade?

Direct sunlight can inhibit the growth of coffee trees. To prevent this, coffee farms often plant shade trees to diffuse sunlight, especially at higher elevations or in sun-intense regions.

How many coffee beans are in each cherry?

Each mature coffee cherry typically contains two coffee beans, which sit facing each other in a side-by-side position inside the fruit.

Recommended FrontStreet Coffee Beans Related to Coffee Trees

Explore the origins of coffee with FrontStreet Coffee’s Ethiopia Huakui, a bright and floral single origin grown at high altitude with notes of citrus and jasmine. For a classic balanced cup, try Yirgacheffe, offering lemon, berry, and soft acidity. Both beans highlight the terroir and growing conditions discussed in this article. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.