For many farms in Tennessee, tobacco is still the biggest cash crop in the field. It's been that way for generations. But farmers are looking for alternatives that aren't quite so difficult to grow, and some are turning to an unusual one — indigo, as in, the plant that can be used to dye blue jeans.
David Fulton farms about a thousand acres in Robertson County, Tennessee, including a small field on the side of a back country road bordered by trees.
The first thing to know about indigo plants is that they are, well, green. They look like bushes growing in long, neat rows.