Origins, races, flowers, climate, supply
Where avocados grow and when they are in season
Every avocado in a shop began on Persea americana, a frost-sensitive evergreen tree in the Lauraceae family. The tree needs suitable soil and water conditions, and its fruit does not soften while still attached. A firm avocado can mature on the tree, then become ready to eat only after harvest.
The place supplying avocados changes as the calendar moves. Mexico sends fruit throughout the year, while production in the Southern Hemisphere helps cover the Northern Hemisphere winter. That changing origin affects the balance of supply and can affect the price shown at the shop.
This page follows the fruit from its beginnings in Mesoamerica to modern commercial orchards. It explains the Hass story, the three botanical races, flower timing, growing requirements, producing countries, seasonal supply, and the reason a mature avocado ripens after picking while an immature one does not.
From Mesoamerica to everywhere
Archaeological evidence at Tehuacan in Puebla, Mexico, places human association with avocados at about 10,000 years. People were eating them by 8000-7000 BC, and cultivation was established at least 5,000 years ago. Those dates show a long relationship between people and a tree native to Mexico through Central America to Peru.
The Nahuatl word ahuacatl supplied the familiar name. Before European contact, people carried avocados across Central and South America, moving the crop well beyond its earliest range. Modern orchards still grow the same species, Persea americana, while selecting forms suited to different climates and fruit preferences.
The Hass story
A seedling selected in California during the 1920s became the Hass avocado. Rudolph Hass patented it in 1935. The variety is an A flowering type, meaning its flowers follow one particular female-then-male opening schedule rather than the reverse schedule of a B type.
Hass became dominant because its history combines a widely grown named selection with commercial production and the practical value of its flowering classification. The supplied facts do not assign Hass a single winning trait or explain a complete market takeover, so claims about yield, flavor, or storage would go beyond the evidence here.
Three races
Avocado types are commonly described in three botanical races. Their differences matter in the orchard and at the point of purchase, especially when comparing skin, oil level, climate tolerance, fruit size, and how long fruit can remain on the tree.
- Mexican, var. drymifolia: small fruit, thin skin, highest oil, greatest cold tolerance, and anise-scented leaves.
- Guatemalan, var. guatemalensis: thick pebbled skin, medium to high oil, and a longer period hanging on the tree.
- West Indian, var. americana: large smooth fruit, lower oil, strong heat and salt tolerance, and least cold hardiness.
| Race | What it contributes |
|---|---|
| Mexicanvar. drymifolia | small fruit, thin skin, highest oil content, most cold tolerant, anise-scented leaves |
| Guatemalanvar. guatemalensis | thick pebbly skin, medium to high oil, longer hang time on the tree |
| West Indianvar. americana | large smooth-skinned fruit, lower oil, most heat and salt tolerant, least cold hardy |
A and B flowers
Avocado flowers use heterodichogamy, a timing system that separates their female and male phases. An A flower opens as female in the morning of day one, closes, and returns as male the next afternoon. A B flower reverses that sequence: male follows a female phase that begins in the afternoon.
Because pollen release and pollen reception occur at different times, planting compatible A and B types nearby usually supports better pollination and fruit set. Hass, Reed, Pinkerton, Lamb Hass, and Gwen are A types. Fuerte, Bacon, and Zutano are B types.
What the tree needs
Avocado trees remain green year-round but are vulnerable to frost. Mature trees can handle a short, light frost; young trees and flowers cannot. Mexican-race types offer the most cold tolerance. Roots need deep soil with good drainage and can fail quickly when water stands around them.
A healthy mature tree commonly alternates between a heavier crop and a lighter crop in successive years. Fruit may remain attached for months after it has matured. This matters for harvest planning, because maturity on the tree is different from the soft texture that develops after picking.
Who grows them
Commercial shipments come from the countries below. Mexico is the largest producer and exports during every part of the year. The other listed countries also ship avocados commercially, but the supplied facts do not provide rankings, volumes, or a fuller comparison among them.
- Mexico is the largest producer and ships avocados year round.
- Peru, Colombia, the Dominican Republic, Chile, Kenya, Indonesia, and Brazil all ship commercially.
- Spain, Israel, Australia, New Zealand, and the United States, mainly California, also ship commercially.
The year in supply
Northern Hemisphere supply is strongest from spring through autumn. During the Northern Hemisphere winter, fruit from Southern Hemisphere production helps fill the gap. The result is not one fixed avocado season, but a sequence in which producing regions take turns supplying the market.
Fresh avocados can therefore be available in every month, while their country of origin changes across the year. That movement also changes the balance of supply and may change price. Mexico's year-round exports add another source alongside the seasonal flow from other producing regions.
At the shop, ask where the avocado was grown and whether its origin reflects the current seasonal supply. That detail can explain why fruit from different weeks may come from different countries. Page reviewed September 6, 2026.
Frequently asked questions
Where did avocados originally come from?
Avocados originated in the region extending from Mexico through Central America to Peru. Archaeology at Tehuacan in Puebla, Mexico, records human association about 10,000 years ago, eating evidence from 8000-7000 BC, and cultivation dating back at least 5,000 years.
Why does some avocado fruit never ripen?
Avocado fruit matures while it is still attached to the tree, but it softens only after harvest. A firm fruit picked at maturity should ripen away from the tree. If it was harvested before reaching maturity, it will never develop the expected soft texture.
What season is avocado in?
There is no single worldwide season. Northern Hemisphere supply generally reaches its high point from spring to autumn, while Southern Hemisphere fruit helps cover winter. With Mexico exporting throughout the year and other countries shipping commercially, fresh avocados remain available as origin and price shift.
Can you grow an avocado from a pit?
The supplied growing facts describe the species, races, climate needs, flowering types, and commercial regions, but they do not establish whether a pit will produce a productive tree. They also do not specify how long such a tree would take to fruit or whether its fruit would match the parent avocado.
How this guide is built
Nutrient figures on this site come from the USDA FoodData Central record for raw avocado, all commercial varieties. Botany, races and flowering follow published avocado research and the species literature. Variety descriptions, seasons and handling follow California avocado trade and grower guidance. Nothing is published before the figure behind it is checked against a named public reference, and the reference family is listed on the about page. Last reviewed: September 6, 2026.