The song was composed in 1966 and first attempted during the aborted "Smile" sessions. In a contemporary article, Wilson said, "I want to turn people on to vegetables, good natural food, organic food. Health is an important element in spiritual enlightenment. But I do not want to be pompous about it, so we will engage in a satirical approach." Biographer David Leaf wrote that the song was based on Wilson's reported health obsession at the time. "The Saturday Evening Post" writer Jules Siegel said that while using marijuana with Wilson and the "Beach Boys marijuana-consumption squad" Michael Vosse mused at how violence in their "vegetative" state could not be achieved, provoking laughter and further discussion of being a vegetable. Siegel said that this encounter was what inspired Wilson to write the song.