Around here we see generic marketing from the various egg, chicken, diary, etc lobbies in tv, radio, and print form. It would be impossible to follow the parent poster's rules and eat anything (big time lettuce might not be into marketing, who knows).

Natural commodities like cabbage, potatoes, beans, peppers, etc are barely advertised. Generally, if it's something anyone can make and there's no good way to differentiate it, there's not much point doing much marketing. Can't speak for the OP but maybe this is what they meant?

I have seen potatoes from Idaho advertised, Avocados from Mexico and Milk from California Cows. So Natural commodities are marketed this way.

Absolutely. These campaigns are all the products of Agriculture Marketing Boards[1] and are generally state-based. They're cooperative marketing agencies which growers and producers belong to to collectively promote their generic product. See also the USDA Agricultural Marketing Service[2].

Idaho Potatoes: https://idahopotato.com

California Walnuts: https://www.walnuts.org

California Almonds: http://www.almonds.com

California Raisins: http://calraisins.org / http://raisins.org

are a few of the domestic ones I've worked with over the years.

EDIT:

Here's a list of all the official California Agricultural Marketing Programs[3]

Speaking of foreign avocados, in addition to Mexico, Chile grows and exports a lot to the US. Of of their interesting arguments is that being in the Southern Hemisphere, their crop is counter-seasonal to our domestic avos. http://avocadosfromchile.org

[1] https://en.wikipedia.org/wiki/Marketing_board [2] https://www.ams.usda.gov [3] https://www.cdfa.ca.gov/mkt/mkt/pdf/ProgramContactInformatio...

Maybe we should eat more turnips and string beans?

I've always wondered why avocados have so much marketing behind them ("Avocados from Mexico" commercials). Seems like they would be in the same boat as other natural foods. I guess it hasn't bothered me enough to do the research, though.

You ever see an advertisement for broccoli?

You've never seen advertisements for the Jolly Green Giant?

Fresh tomatoes and the like.

In Australia supermarkets certainly advertise fresh fruit and vegetables in multiple forms of media. And not just "we sell vegetables", but "this week Australian grown XXXX are just $Y per kg!"

Australian readers can probably hear that Coles announcer voice in the heads right now.

Does this heuristic only apply if its a standalone advertisement?

That would cut out bananas, mangos, avocados, pistachios, every mainstream meat, eggs, dairy and water (both bottled and tap).

Right, supermarkets are necessarily not selling the product as much as their brand. The message here is - 'Come to our store, we have all these products at discounted prices'.