My Maddening Quest to Find Out if Blueberries Come From Farms Where Workers Were HarmedOver the past year, I’ve reported about crimes against farmworkers who have come to the U.S. legally from Mexico and Central America. I wanted to know: With enough digging, would it be possible to determine if the blueberries I’m buying come from farms with a record of mistreating workers? Illustration by Andrew B. Myers for ProPublica That makes it even harder to know if the berries you’re buying come from farms where workers were harmed. I was able to trace one brand’s berries back from my grocery store to an individual farm. I was able to trace one brand’s berries back from my grocery store to an individual farm.