Probably because they have no clue where the cuke was grown.
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Stores where I am will include on the pricing signs where the food is from. Most of the products have labels saying what country it is a product of, too. I always look and choose an American grown cucumber, for example, or tomato, etc. I want to support our growers, and I trust it more, too.
I agree yet when I go shopping for veggies rarely do I see USA but more from Mexico or Peru. Since I live in an apartment can’t have a garden.