Britannica Sources used in this answer

Why do coffee plants grow best in the Coffee Belt?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Paper bags filled with roasted coffee beans, ground coffee, and instant coffee granules arranged closely together. — coffee Roasted coffee beans, ground coffee, and instant coffee in paper bags.

Coffee plants thrive within the "Coffee Belt"—the region located between the Tropic of Cancer and the Tropic of Capricorn—because this area provides the specific temperature and rainfall conditions necessary for their development.1

The most favorable temperatures for coffee cultivation range between 23 and 28 °C (73 and 82 °F), as coffee plants cannot survive temperatures near 0 °C (32 °F). Additionally, these regions generally provide the required annual rainfall of 1,500 to 2,000 mm (60 to 80 inches).1

Specific environmental needs vary by species:
* Arabica: This delicate variety requires a cool subtropical climate, typically found at higher elevations between 600 and 2,000 meters (2,000–6,500 feet), along with significant moisture and specific shade requirements.12
* Robusta: As the name implies, this variety is hardier and can be cultivated at lower altitudes, ranging from sea level to 600 meters.12

Where natural rainfall is insufficient, irrigation is utilized to maintain the moisture levels required for healthy growth.1