No one is saying Kentucky doesn't offer its share of distinctive intoxicants. Bourbon and tobacco have long been popular drugs here, and even in these abstemious times, a well-known member of the political class will occasionally pour his visitors a glass of moonshine from a Mason jar with plumped cherries bobbing on the bottom.
But the farmers around Lexington are mostly old-fashioned men with a serious problem: the decline in demand for U.S. tobacco. And when they tell you they know of a crop that could help replace tobacco and maybe save their farms, they aren't promoting any stoner foolishness. True,...