Cacao trees grow in a narrow tropical band roughly 20 degrees north and south of the equator, sometimes called the “cocoa belt.” The largest producers are countries in West Africa, Central and South America, and Southeast Asia, where year-round warmth, heavy rainfall, and high humidity create the specific conditions these trees demand.
The Cocoa Belt: Major Growing Regions
West Africa dominates global cacao production. Côte d’Ivoire and Ghana together account for more than 60 percent of the world’s cocoa supply, with Nigeria and Cameroon also contributing significantly. The warm, humid lowlands near the Gulf of Guinea provide near-ideal growing conditions.
In the Americas, cacao is native to the Amazon basin and has been cultivated in Central and South America for thousands of years. Ecuador, Brazil, Colombia, Peru, and the Dominican Republic are all major producers. Ecuador in particular is known for “fine flavor” cacao varieties that trace back to the tree’s wild origins in the upper Amazon.
Southeast Asia rounds out the picture. Indonesia is one of the world’s top producers, and smaller harvests come from Papua New Guinea, the Philippines, and parts of India. Cacao also grows on tropical Pacific islands, including in the National Park of American Samoa, where intact rainforest provides conditions close to the tree’s natural habitat.
Climate Conditions Cacao Needs
Cacao is one of the most climate-sensitive crops on the planet. According to the International Cocoa Organization, trees respond best to a maximum annual average temperature of 30 to 32°C (86 to 90°F) and a minimum average of 18 to 21°C (64 to 70°F). That range is narrow, and temperatures need to stay fairly uniform throughout the year, without dramatic swings between seasons.
Rainfall requirements are equally specific. Cacao needs between 1,500 and 2,000 millimeters (roughly 59 to 79 inches) of rain per year, distributed relatively evenly. A prolonged dry spell of more than about three months can stress the trees and reduce pod yields. Humidity in cacao-growing regions is generally high: often reaching 100 percent during the day and dropping to 70 to 80 percent at night. That constant moisture supports both the tree itself and the tiny insects that pollinate it.
Shade, Soil, and the Forest Canopy
In the wild, cacao is an understory tree. It evolved to grow beneath the canopy of taller tropical species, shielded from direct sun and strong wind. This is why traditional cacao farming often uses an agroforestry model, planting cacao beneath taller shade trees like banana, coconut palm, or timber species. The shade moderates temperature extremes, reduces moisture loss from the soil, and creates habitat for beneficial organisms.
How much shade matters is an active area of research. Studies have found that both the density and the height of shade trees influence cacao productivity and the health of surrounding ecosystems. Too little shade exposes trees to heat stress. Too much reduces the light they need to produce pods. Most successful farms aim for partial, dappled shade rather than full sun or deep forest cover.
Cacao also needs nitrogen-rich soil with good drainage. Waterlogged roots are a fast path to disease. The tree thrives in deep, loamy soils common to tropical river valleys and lowland forests, typically at elevations below about 300 meters (1,000 feet), though some varieties grow at higher altitudes in places like Ecuador and Colombia.
Why Pollination Shapes Where Cacao Can Thrive
Cacao flowers are tiny, roughly the size of a pencil eraser, and they can’t be pollinated by honeybees. Instead, the job falls to chocolate midges, minuscule flies in the genus Forcipomyia that are small enough to navigate the flower’s complex structure. These midges are native to dense, shady rainforests where they breed in leaf litter, rotting fruit, and other moist organic debris on the forest floor.
This creates a practical problem. On large commercial plantations where cacao is grown in open rows without much ground cover, midge populations tend to be low, and pollination rates drop. In natural or semi-natural settings with intact leaf litter and shade, midges are far more abundant. It’s one reason agroforestry systems that mimic forest conditions often outperform monoculture plantations in the long run, even if they look less “efficient” on paper.
How Climate Change Threatens Growing Regions
Rising temperatures and shifting rainfall patterns pose a serious risk to cacao cultivation. A study modeling the Brazilian Amazon found that suitable land for cocoa could shrink by 37 percent under a moderate warming scenario by 2050, and by as much as 73 percent under a high-emissions scenario. The main drivers are higher temperatures during the dry season (projected to rise by 2 to 2.7°C) and reduced rainfall during the driest months, with some areas losing nearly 20 millimeters of rain per month.
These changes don’t just make existing farmland less productive. They also increase rainfall seasonality, meaning the difference between wet and dry months becomes more extreme. Cacao, which depends on relatively even moisture year-round, handles drought poorly. In West Africa, some projections suggest that current lowland growing areas will become too hot and dry, pushing viable cultivation to higher elevations where temperatures are cooler but where forest would need to be cleared to plant new farms.
For the regions that currently supply most of the world’s chocolate, the margin for error is slim. Cacao’s narrow climate requirements mean that even small shifts in temperature or rainfall can move the boundaries of where the tree can grow, reshaping the global cocoa map within a generation.