Peru caught blueberry fever a little over a decade ago. Farmers noticed that their counterparts in Chile were making a lot of money selling the fruit during the off-season in the United States, when prices are high. They sought to do the same—and things have worked out better than anyone dared hope. Back in 2013 Peruvians earned about $17m exporting blueberries; by last year receipts had soared to $1.7bn. In 2019 Peru became the world’s single biggest exporter of fresh blueberries. Nowadays it sends more than twice as many berries abroad as its closest rivals.