Best to avoid leafy greens.
The Big Fat Surprise
Meanwhile, also contrary to our common impression, early Americans appeared to eat few vegetables. Leafy greens had short growing seasons and were ultimately considered not worth the effort. They “appeared to yield so little nutriment in proportion to labor spent in cultivation,” wrote one eighteenth-century observer, that “farmers preferred more hearty foods.” Indeed, a pioneering 1888 report for the US government written by the country’s top nutrition professor at the time concluded that Americans living wisely and economically would be best to “avoid leafy vegetables,” because they provided so little nutritional content. In New England, few farmers even had many fruit trees, because preserving fruits required equal amounts of sugar to fruit, which was far too costly. Apples were an exception, and even these, stored in barrels, lasted several months at most.