Wordly Wise

I've been browsing at my favorite boutique, Target, and I am incredibly confused about product labeling:

Is "natural" the same as "green?" And do either of those equal "organic?" And are chickens the only things that can be "free range?"

For example, could the watermelon that I just bought out of the back of that old man's truck, which he swears he grew unhindered by fences or trellises or pruning, letting the vine find its own way, and that he promises me was grown without the use of pesticides or fertilizers, other than manure from Old Bessy (his cow), be marketed as a natural, green, organic, free range watermelon?

Or would that be redundant?