As an added bonus, farmers' markets tend to be cheaper than supermarkets even as the food is better. It mystifies me that they aren't more commonly used and have a reputation as being for rich hipsters (i.e., like Whole Foods).
Are there many farmers markets open for the second shift worker getting off at, say, 10pm?
I guess a large chunk of people are able to make one or the other, but it also won't work all that well as an only source of produce.
the alemany farmers market is also similar in terms of cost and availability of produce. not too hard to avoid the ferry building and fort mason type hipster farmers markets :) not as easy as the markets in terms of hours/access, but...
And even if they do sell their own produce, who knows where they're growing it, or if they've had the soil tested for contaminants, or if they're being honest about pesticides and fertilizers.
Edit: think of “USDA Organic” label as more of an industry marketing gimmick that allows them to triple prices, than any genuine intent to produce safer foods.