Back in 1984, Susan and Donny Davis ditched their Baton Rouge, Louisiana, careers—public relations for her, wildlife biology for him—to tend heirloom vegetables in Susan's hometown of St. Francisville, Louisiana. There was just one hitch: Farming wasn't exactly lucrative. But Susan came across a potential sideline while poring over her grandmother's stash of buttons. "Some glass ones were pretty enough to make into earrings," Susan recalls, "so I did just that."
FIRST STEPS She named her endeavor—what else?—Grandmother's Buttons. The Davises started out peddling Susan's jewelry, featuring pre-1960s buttons, at crafts fairs. "Our kids, Ben and Anna, grew up at trade shows!" Susan confesses. In 1989, she got a big break: An area department-store chain picked up the line, prompting Donny to quit farming and manage the business. Today, some…