I really think there's a market for a grocery store "herb bar." A self-service bed where herbs grow and customers just take what they want. I would think this could greatly lower the expense of selling fresh herbs, since it's probably a easy thing to set and forget with a little automation.

I maintain my own herb garden. $10 of plants and some regular watering keeps me very well stocked with everything I need from spring until fall. I haven't refreshed the soil in five years and everything still grows to fill the entire pot by summer.