Chocolate comes from cacao trees, which grow in a narrow tropical band around the equator known as the “cacao belt.” This belt stretches roughly 20 degrees north and south of the equator, though most cacao grows within just 10 degrees of it. That limits production to parts of West Africa, Central and South America, and Southeast Asia, where temperatures stay between 18 and 30°C (64–86°F) year-round and rainfall reaches at least 1,000 mm (about 40 inches) annually.
The Amazon Origins of Cacao
Cacao is native to the Upper Amazon basin in South America, where the greatest genetic diversity of the species still exists today. Archaeological and genomic evidence points to domestication beginning at least 5,300 years ago, when human populations in that region started selecting trees with desirable traits. From there, pre-Columbian societies carried cacao into Mesoamerica roughly 3,600 years ago, likely from what is now Ecuador. For thousands of years, cacao remained a crop of the Americas.
European colonization changed that. In the 18th century, a variety called Amelonado was brought from the lower Amazon to the Bahia region of Brazil, and from there it made the jump to West Africa. That single introduction laid the foundation for what would become the world’s dominant cocoa-producing region.
Why West Africa Dominates Production
West Africa now produces nearly 70% of the world’s cocoa beans. Côte d’Ivoire and Ghana alone, along with smaller contributors like Nigeria, Sierra Leone, and Togo, accounted for 61% of global production in 2023. The region’s climate hits the sweet spot for cacao: consistent warmth, high humidity, and rainfall spread across much of the year.
Rainfall patterns matter more than total rainfall. A dry season lasting longer than three months with less than 100 mm of rain per month is a critical limit for cacao growth and yield. West Africa’s wet seasons are long enough to keep trees productive, though the length of dry spells varies by location and increasingly by year. Research modeling the factors that determine where cacao thrives found that climate variables, especially temperature consistency and rainfall during the warmest months, account for about 85% of what predicts suitable growing conditions. Soil factors contribute only about 15%, though nitrogen content, the soil’s ability to retain nutrients, and pH are the most important soil characteristics for cacao specifically.
Other Major Growing Regions
Outside West Africa, cacao grows commercially across Latin America and Southeast Asia. Ecuador, Brazil, Peru, Colombia, and the Dominican Republic all produce significant quantities, with Ecuador and Brazil being the largest Latin American producers. In Southeast Asia, Indonesia is the leading grower, with smaller contributions from Papua New Guinea and the Philippines.
Each region produces beans with distinct flavor profiles. Latin American cacao, particularly from Ecuador and Peru, is often prized for fine-flavor varieties descended from older genetic lines. West African beans tend to be the bulk cacao that fills most commercial chocolate bars. Southeast Asian production expanded rapidly in the late 20th century but has fluctuated as farmers weigh cacao against other crops like palm oil.
How Cacao Trees Actually Grow
Cacao trees are unusual. Unlike most fruit trees, they produce flowers and pods directly on their trunks and older branches, a trait called cauliflory. Tiny flowers emerge from bumpy patches on the bark known as “flower cushions,” and these same spots can keep producing flowers for the entire life of the tree. A single cushion may go through multiple flowering episodes in a season, each lasting a minimum of about three weeks.
When grown from seed, a cacao tree typically begins flowering after two to four years. The transition is sudden: the tree develops a branching point called a jorquette, and flowers appear at the base of dormant buds that may have sat quietly on the trunk for years. Only a small fraction of those flowers get pollinated (mostly by tiny midges), and fewer still develop into the large, colorful pods that hold 30 to 50 cocoa beans each, surrounded by sweet white pulp.
Most cacao farms aren’t neat orchards. The trees grow best under partial shade, and farmers traditionally plant them beneath taller canopy trees like mango, avocado, or teak. Research from Côte d’Ivoire found that beans from shaded plots had better commercial quality across multiple measures: their shells met export standards, their protein content was higher, their pH was better suited for fermentation, and they produced more stable foam, a property that matters for products like chocolate mousse and whipped beverages. Beans from sunny, unshaded plots had thicker shells, lower protein levels, and less consistent quality. This shade-grown approach, called agroforestry, also helps regulate the microclimate and adds organic matter to the soil.
Climate Change Is Shifting the Map
The geography of chocolate is not fixed. Under a business-as-usual emissions scenario, Côte d’Ivoire and Ghana are projected to see a temperature increase of about 2.1°C (3.8°F) by 2050. That may not sound dramatic, but for a crop that depends on narrow climate conditions, it’s enough to redraw the map of suitable growing land.
Rising temperatures will push viable cacao cultivation uphill. In West Africa, the optimal altitude for cacao is expected to shift from roughly 100–250 meters (350–800 feet) above sea level to 450–500 meters (1,500–1,600 feet). The problem is that much of that higher terrain is hilly and often already protected as forest reserves or national parks. A study of 294 cacao-growing locations found that only 10.5% were likely to become more suitable for production by 2050. The remaining 89.5% were projected to become less suitable, primarily because of heat stress and shifting rainfall patterns.
For the millions of smallholder farmers who grow most of the world’s cacao, this means adapting quickly: planting more shade trees, selecting heat-tolerant varieties, or in some cases moving farms to higher ground entirely.