What Is a Coffee Tree? Species, Growth & Key Traits

If you’ve ever wondered what kind of plant produces your morning coffee, you’re not alone. Most coffee drinkers have no idea what a coffee tree even looks like—let alone how tall it grows, what its cherries look like, or why some beans cost more than others. This guide breaks down everything you need to know about the coffee plant itself, starting with the basics.

Coffee trees are evergreen shrubs or small trees from the Rubiaceae (or madder) family. Wild ones can reach 5–10 metres, but farm-grown trees are pruned to under 2 metres to boost yield and ease harvesting. Their oval leaves grow opposite each other, flowers are white and grow at leaf joints, and mature cherries look like red cherries with sweet flesh enclosing a pair of seeds—that’s your coffee bean.

Two Main Commercial Coffee Species

The global coffee trade revolves around two primary species: Coffea Arabica (Arabica) and Coffea Robusta (Robusta, also called Canephora). There are also minor species like Coffea Liberica (Liberica) and Coffea Arabusta (a hybrid), but these are rarely seen in the market.

Robusta vs Arabica: Key Physical & Flavor Differences

Robusta trees grow well at low altitudes, resist disease better, and produce higher yields. Visually, Robusta beans are rounder with a slightly swollen center, straighter grooves, and resemble soybeans. Arabica beans are more oval, with curved grooves, and look a bit like half a peanut. In flavour, Robusta tends to be blander, contains 2–3 times more caffeine than Arabica, and is mostly used in instant coffee and low-cost blends. Arabica, on the other hand, offers more complex flavours and is the foundation of specialty coffee.

Where Arabica Coffee Trees Thrive: Altitude, Climate & Conditions

Arabica coffee trees flourish at elevations of 1,000–2,000 metres on well-drained, fertile slopes. They require a climate that isn’t too humid but still has consistent rainfall and distinct wet seasons. During the day, they prefer mild temperatures (not hot), less than two hours of direct sunlight, and often rely on afternoon rain or fog. In the absence of natural shade, farmers plant taller trees to protect the coffee. At night, Arabica needs cool temperatures around 10°C—too warm speeds up cherry development and reduces bean quality, while frost can kill the tree outright. These needs mean Arabica grows best in high-altitude, mountainous regions along the Tropic of Cancer and Tropic of Capricorn—what’s known as the Coffee Belt.

Coffee Tree Anatomy: Leaves, Flowers & Cherries

A typical coffee tree has dark green, glossy, oval-shaped leaves that grow in opposite pairs. The branches at the tips are long with few offshoots. White flowers bloom where the leaf stems meet the branches. Once pollinated, these flowers develop into coffee cherries. When mature, the cherries turn a bright red—like cherries—and their sweet pulp covers a pair of seeds: your coffee beans.

Frequently Asked Questions

What family does the coffee tree belong to?

Coffee trees are part of the Rubiaceae family, also known as the madder or bedstraw family. This botanical classification includes many other plants, but coffee is one of its most economically significant members.

How tall can a coffee tree grow?

Wild coffee trees can grow up to 5–10 metres tall. However, in commercial coffee farms, trees are pruned to stay under 2 metres to increase fruit production and make harvesting easier.

What do coffee cherries look like when ripe?

Ripe coffee cherries are bright red and shaped like cherries. They have sweet flesh surrounding a pair of seeds—these seeds are the coffee beans used to make brewed coffee.

What’s the difference between Arabica and Robusta coffee trees?

Arabica trees grow best at higher altitudes (1,000–2,000m), produce complex-flavoured beans, and are more delicate. Robusta trees grow at lower altitudes, have higher yields, are disease-resistant, and produce beans that are more bitter, higher in caffeine, and usually used in instant coffee.

What climate do Arabica coffee trees need?

Arabica thrives in cool, mild climates with altitudes of 1,000–2,000 metres, consistent rainfall, and temperatures that stay below 20°C during the day and around 10°C at night. They prefer shaded environments and well-drained, fertile soils.

Are there other coffee species besides Arabica and Robusta?

Yes, lesser-known species include Liberica and Arabusta (a hybrid), but they are not common in the global coffee trade and rarely appear in specialty or commercial markets.

FrontStreet Coffee Beans for Arabica Lovers

Explore the elegance of Arabica coffee with FrontStreet’s single origins grown in ideal high-altitude conditions. The Ethiopia Yirgacheffe offers bright citrus and floral notes, while Colombia Huila delivers balanced caramel and nuttiness. For something more chocolatey and bold, try Guatemala Antigua. All showcase the complexity Arabica is known for. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.