How Coffee Trees Are Classified by Species and Cultivation

Coffee drinkers rarely think about where their beans come from beyond the country of origin—but the plant itself holds crucial answers. From the towering height of wild coffee trees to the carefully pruned bushes on commercial farms, the species and cultivars determine everything from yield to flavor. If you’ve ever wondered why some coffees taste wildly different even within the same region, the classification of the coffee tree is where it starts.

There are at least 40 identified species of coffee plants, but only three are commonly cultivated on a global scale: Typica, Bourbon, and other high-elevation adapted cultivars grouped under 'highland', 'lowland', and 'lowest' cultivation types. These distinctions influence bean quality, climate suitability, and farming practices.

What Is a Coffee Tree?

Coffee trees belong to the Rubiaceae family, a group of flowering plants known for producing biologically active compounds. Other members include the cinchona tree, the source of quinine used to treat malaria, and plants used against amoebic dysentery. Within this family, coffee stands out as the primary globally cultivated plant grown for its unique alkaloid—caffeine.

The Structure of the Coffee Cherry

A coffee cherry is made up of several layers encasing the seed, or bean. From the outside in, these are: the outer skin, the pulp (fruit flesh), the parchment (inner skin), and the silverskin—finally revealing the coffee bean at the center. Most cherries contain two beans facing each other, but about 5% have just one, round bean called a peaberry (or '' in Chinese). The more common two-bean cherries are referred to as 'female beans' or '' for their symmetrical form.

Major Coffee Tree Varieties and Cultivars

The genus Coffea includes at least 40 species, but the commercially viable and widely planted ones fall into three primary cultivated types:

• Highland Cultivation Types: Typically refers to plants like Typica and Bourbon, suited to higher altitudes and cooler temperatures.
• Lowland Cultivation Types: Varieties adapted to warmer, lower-altitude regions, often with higher yields but lower cup quality.
• Lowest Cultivation Types: Usually robust, disease-resistant strains grown in challenging environments, though often with inferior flavor profiles.

These terms help classify how and where coffee trees are grown, influencing both cultivation methods and bean characteristics.

Growth Cycle and Farming Practices

Coffee trees take two to three years to reach a mature height of five to ten metres. However, to make harvesting easier and preserve bean quality, farmers usually prune them to a manageable height of 1.5 to 2 metres. The trees begin producing fruit three to five years after planting. Once they start fruiting, they remain productive for around twenty years.

The coffee tree’s leaves are dark green on top, lighter underneath, and grow in opposite pairs. Its pure white flowers, with five (sometimes six or eight) petals and a jasmine-like fragrance, bloom for just three to four days. The coffee cherries start out the same deep green as the leaves. As they ripen, they turn yellow, then red, and finally a deep crimson red—indicating optimal harvest time.

The Coffee Belt: Ideal Growing Regions

Coffee thrives in the 'Coffee Belt' or 'Coffee Zone', a ring around the Earth between the Tropic of Cancer and the Tropic of Capricorn. This region offers the ideal mix of conditions: rich, often volcanic, soils; average temperatures around 20°C; annual rainfall between 1,000 and 2,000 mm; minimal temperature fluctuation throughout the year; and protection from frost, harsh winds, and extreme dry heat.

Because of these specific environmental requirements, coffee production is geographically limited to certain tropical regions that meet these criteria.

How Quality Classification Drives Coffee Markets

In recent years, coffee-producing countries have shifted focus from sheer volume to quality-driven systems. Brazil, for instance, introduced the Cup of Excellence competition in 1999 to better identify and reward high-quality lots. This and similar programs aim to incentivize producers to grow specialty-grade coffee. Reflecting this trend, the specialty coffee sector became one of the fastest-growing segments in the food service industry, reaching $12.5 billion in the U.S. market alone by 2007—a figure that underscores the expanding global demand for quality coffee.

Recommended FrontStreet Coffee Beans for Tree Variety Exploration

Explore the diversity of coffee origins tied to different cultivation types with FrontStreet Coffee’s single origins. The Brazil Queen Manor offers a classic lowland-style profile with nutty sweetness and soft acidity, reflecting traditional lower-altitude growing conditions. For a highland-type expression, try Yirgacheffe, which highlights bright citrus and floral notes typical of Typica and Bourbon descendants grown at elevation. Finally, the Ethiopia Huakui showcases the complexity possible with high-altitude cultivation, featuring delicate stone fruit and jasmine layers. All three beans highlight how cultivation type shapes flavor. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.