Gardening, agriculture. Adam was appointed by God to dress the
garden of Eden, and to keep it (Gen. ii. 15); and after the fall he was sent
out of the garden “to till the ground” (Gen. iii. 23).
“There is no ancient gentlemen, but gardeners, ditchers,
and grave-makers; they hold up Adam's profession.”
—The Clown in Hamlet,
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894