David Guempel, a chef at Café Osage, cuts some herbs from the rooftop at Bowood Farms, an innovative family-owned nursery and garden center at Olive Street and Walton Avenue. Guempel was the owner of the recently closed Zinnia and a former chef at Cafe Balaban. (Jerry Naunheim Jr.)
Here's a creative idea for a rooftop garden that could easily be adapted to demonstrate and sell sub-irrigated grow boxes like the EarthBox. Read the article. I wonder if Bowood Farms in St. Louis even sells them.