George Washington grew marijuana in his garden.

(In fact, he was forced to do it, allegedly for the fibre. In 1762, Virginia awarded bounties for hempculture and manufacture, and imposed penalties upon those who did not produce it. But there is some suggestion that he had other properties in mind, as he wrote in his diary:-

May 12-13 1765: “Sowed Hemp at Muddy hole by Swamp.”
August 7, 1765: “–began to seperate (sic) the Male from
the Female Hemp at Do–rather too late.”

George Andrews argued, in _The Book of Grass: An Anthology of Indian Hemp_ (1967), that Washington’s August 7 diary entry “clearly indicates that he was cultivating the plant for medicinal purposes as well for its fiber.” How times have changed.)