Even in suburban areas. In San Jose we have Phil Cosentino's J & P Farms on Carter Avenue next to the Camden-85 interchange:
https://www.google.com/maps/@37.249591,-121.909198,240m/data...
https://www.google.com/maps/uv?hl=en&pb=!1s0x808e340f2c491c5...
Sometimes there will be someone out at their fruit stand, but most of the time it runs on the honor system with a money slot where you pay for your produce.