George Washington grew hemp! And it was for industrial use on his own plantation where they made rope, sail canvases and thread. Today, Mount Vernon maintains a working farm where they feature hemp to expand its interpretation of George Washington’s role as an enterprising farmer.
“I am very glad to hear that the Gardener has saved so much of the St. foin seed, and that of the India Hemp. Make the most you can of both, by sowing them again in drills. . . Let the ground be well prepared, and the Seed (St. loin) be sown in April. The Hemp may be sown any where.”
— George Washington to William Pearce, 24 February 1794
The whole story is here packed with lots of hemp history:
George Washington Grew Hemp · George Washington’s Mount Vernon