Any given color can no doubt be associated with many things. I don't disagree that a natural association of the color green is with growth, but what makes you say *the" natural association? Yes, green is the color of leaves and moss and thus it seems natural to associate it with growth and abundance. But green is also the color of the puss from gangreene and people who are desperately ill sometimes have a green tinge, so green is equally naturally the color of sickness. In the United States our money has been green for a century or more so Americans often use the color green to represent money or wealth. (A common slogan of those who say their business is uninterested in the race of its customers or employees is, "We don't care about black or white, just green.") Green is commonly understood to mean permission or progress because a green traffic light means go. (Or maybe a green traffic light means "go" because the color green was associated with permission -- I can't say which came first.)
I suspect you could say the same about many colors. "Black" is often associated with the unknown or fear, presumably because we can't see in the dark. But it is also associated with finanacial solvency, because of the old practice of writing positive monetary amounts in black ink and negative amounts in red ink. Etc.