Mission Garden, Four Thousand Years in Four Acres
Arizona
At the base of Sentinel Peak, the basalt hill Tucsonans call A Mountain, there is a four-acre garden on a spot that has been farmed for thousands of years, one of the longest continuously cultivated places in what is now the United States. The Mission Garden is not a historic recreation. It is, in a sense, a direct continuation, because people have been farming this spot beside the Santa Cruz River for at least three thousand five hundred years.
The earliest farmers here were the ancestral Hohokam, who built canals to divert the Santa Cruz thousands of years ago. The Hohokam tradition evolved into the O'odham people, who maintained the irrigation system and cultivated native crops, three sisters agriculture, saguaro harvest, tepary beans, and native cotton, across the centuries. When the Spanish arrived in the sixteen hundreds, they introduced new crops: figs, pomegranates, quince, wine grapes, and European wheat. The acequias, the open irrigation ditches that fed these gardens, are among the oldest human infrastructure features in what is now the continental United States.
By the Mexican period and then the American territorial period, the garden fell to private hands, then to neglect. Part of the site was later used as a city landfill. In the early two thousands, a volunteer effort began to restore what lay beneath. Excavators uncovered the original acequia channels, still traceable in the soil. Heritage seeds were sourced from Tohono O'odham seed stewards, from mission archives, and from university collections. Trees were planted representing every agricultural era layered on this spot.
Today the Mission Garden is a living museum organized by time period. You walk from the O'odham garden into the Spanish colonial section, then the Mexican rancho section, then the early American territorial garden. Each section grows actual heritage varieties, tended by volunteers and cultivated to be eaten. At the center of it all, water still moves through the acequia, as it has for more than a hundred generations.
