Colorado farmers have become increasingly reliant on seasonal foreign labor to grow the food that makes it your local grocery store. The H-2A visa allows American employers to hire foreign laborers for agricultural work when they cannot find domestic help to do the job. Employers are supposed to pay for nearly all their guests’ expenses: housing, tools and transportation to and from the U.S., as well as to their work sites. But a Denver Post investigation found Colorado growers routinely short-change these vulnerable workers. Nearly one in 10 Colorado employers who have used the H-2A program since 2015 have stolen wages or illegally charged their workers outside the bounds of the visa, a Post analysis of federal labor data found.