During this period and until the end of his life he was constantly receiving trees and shrubs from various parts of the world. Thus in 1794 he sent to Alexandria by Thomas Jefferson a bundle of "poccon [pecan] or Illinois nut," which is some way had come to him aat Philadelphia. He instructed the gardener to set these out at Mount Vernon, also to sow seeds of the East Indian hemp that had been left in his care.
Paul Leland Haworth, George Washington: Farmer: Being an Account of His Home Life and Agricultural Activities (The Bobbs-Merrill Company, 1915), p. 75.
Ury House -- 1794
Thomas Jefferson planted a pecan tree on the lawn.
Manning Smith, "Sisters in Historic Mansion Hold Off Invaders" (Philadelphia Record, 1940.01.29).