The Coffee Belt: Where Coffee Grows

Coffee grows commercially only within a tropical band roughly between the Tropic of Cancer and the Tropic of Capricorn, widely called the coffee belt or bean belt. Inside that band, altitude and local climate — not latitude alone — decide whether a hillside can grow coffee, and which of coffee's two main species will thrive there.

What Is the Coffee Belt?

The coffee belt is the tropical zone between the Tropic of Cancer and the Tropic of Capricorn (roughly 23.5°N to 23.5°S). Within that band sit most of the roughly 70 countries that grow coffee commercially, spread across Latin America and the Caribbean, sub-Saharan Africa, and South and Southeast Asia, according to Wikipedia's entry on coffee production.

Latitude only sets the outer limits, though. Inside the belt, coffee actually grows wherever elevation, rainfall and temperature line up, which is why farms cluster on particular hillsides and plateaus rather than spreading evenly across every country the belt touches.

Why Does Altitude Matter for Coffee?

Altitude works as a stand-in for temperature: air cools as elevation rises, so a farm can sit close to the equator and still get the cooler conditions coffee needs to ripen slowly and develop flavor. Arabica is typically grown between about 3,900 and 4,900 feet (1,200 to 1,500 meters), though it's planted anywhere from sea level to roughly 9,200 feet (2,800 meters) depending on the region, according to Wikipedia's entry on Coffea arabica. Robusta generally does well at lower elevations, since its preferred temperatures run warmer than arabica's.

What Climate Do Arabica and Robusta Need?

The two species want different weather. Arabica does best with average temperatures between about 59 and 75°F (15 and 24°C), while robusta prefers a warmer 75 to 86°F (24 to 30°C), according to figures compiled on Wikipedia's coffee bean entry. Both need substantial, fairly steady rainfall, commonly cited as 20 to 118 inches (500 to 3,000 mm) a year, with more moisture wanted while fruit is developing and less as it ripens. Neither species tolerates frost, which is why coffee's commercial range stops well short of the belt's outer edges even where average temperatures might otherwise allow it.

Which Regions Make Up the Coffee Belt?

Brazil anchors the belt's Americas stretch and alone accounts for close to 45 percent of the world's coffee exports, with Colombia and Central America filling out the region, according to Wikipedia. See our guides to Brazilian and Colombian coffee for more on how these origins compare. Vietnam is the belt's robusta powerhouse in Asia, while Indonesia's islands and India's shaded hill farms add further diversity. Across the belt, arabica tends to claim the higher, cooler ground and robusta the warmer lowlands, though many countries grow both.

Where Is Coffee Grown in Africa?

Africa holds both ends of coffee's story. It's home to Ethiopia, where arabica originated in highland forests, and to the West and Central African forest belt — from Liberia to Tanzania and south to Angola — that is robusta's native range, according to Wikipedia's entry on Coffea canephora. Modern African producers stretch from Ethiopia and Kenya in the east to Uganda and beyond, growing whichever species suits their elevation.

How Is Climate Change Shifting the Coffee Belt?

Both of coffee's major species are described as vulnerable to the shifts climate change is bringing to their growing zones, according to Wikipedia's entry on the Coffea genus. Rising average temperatures and less predictable rainfall push some lower-elevation farms outside the window either species needs, forcing growers toward higher, cooler ground where land is limited.

World Coffee Research, an industry-funded science nonprofit, lists climate change among the central long-term risks to coffee supply, tied to broader agricultural emissions that the IPCC's Sixth Assessment Report estimates at roughly a quarter of all human-caused carbon emissions. Exactly how much suitable land the belt will lose is still debated among researchers and varies by region and species, so specific predictions are best read as estimates rather than settled fact.

Can Coffee Be Grown Outside the Belt?

Not commercially, and not for lack of trying. Coffee has been grown experimentally well outside the tropics, in sheltered microclimates and even heated greenhouses, but reliable, exportable harvests still depend on the coffee belt's combination of latitude, altitude and rainfall. That's also why coffee origins are usually marketed by specific region rather than by whole country: a farm's elevation and microclimate matter more than which side of the equator it sits on.

The Caribbean stretch of the belt is a good example. Jamaica sits well inside the tropics, but it's the elevation of its Blue Mountains, not the island's latitude, that lets a single, legally defined growing area produce coffee prized enough to be sold under its own name rather than the country's alone.