How did the Aztecs grow crops on a lake, and did their gardens really float?
The famous 'floating gardens' never floated at all. They were fenced beds of mud that could give seven harvests a year.
▶ Start the storyThe Aztecs grew crops on the lake by building small islands of farmland in the shallows, called . Despite the popular nickname floating gardens, they never floated. A chinampa was a long, narrow rectangular bed made by staking out the shallow lake bed, fencing the rectangle in with woven , and piling in mud, lake and decaying plants until the top rose above the water.
The trick that made them so productive was the water around them. Beds were separated by channels wide enough for a canoe, and in some places by ditches that gave plants continuous access to water, so crops did not depend on rainfall. Farmers also dug the rich mud from the bottom of the ditches and spread it over the beds, which fertilized them. These raised, well-watered beds gave very high yields, with up to seven harvests a year.
up to 7
The Aztecs did not invent the technique. But they were the first to develop it into large-scale cultivation. Crops included maize, beans, squash, , tomatoes, chili peppers and flowers. also helped the Mexica expand their island itself, using them to dry out and extend it.
The system did not vanish with the empire. Remnants survive today in Xochimilco, in the south of Mexico City, and in 2018 the United Nations designated the area a Globally Important Agricultural Heritage System.
Quiz me
0/3
Recap
A chinampa is a fenced bed of mud and plants in shallow water whose ditches keep crops watered, fertilized with dredged mud, and productive up to seven times a year.
💡 A trick to remember it · Think of a lake-sized egg carton: fenced rectangles of mud, each with its own water ditch, and the mud you dig from the ditch feeds the plants.
Surprising fact · They never floated, and the Aztecs did not invent them; they were the first to scale the technique up.
Sources (2)
No source, no claim. Every fact in this lesson (14 claims) cites at least one of these.