At my local grocery store, out here in the middle of nowhere, a head of cauliflower costs $5 and a wilted ball of lettuce might run you $3. It’s a far cry from the vibrant…

At my local grocery store, out here in the middle of nowhere, a head of cauliflower costs $5 and a wilted ball of lettuce might run you $3. It’s a far cry from the vibrant…