Thomas Jefferson used hemp and grew hemp. He advocated for it as well.
Today’s federal government has a near ban on growing this important crop, and has maintained that unconstitutional ban for decades. States, however, are slowly moving to legalize the crop with or without federal permission.
While we’ve not been able to find an original source for this quote, we don’t include it with some spurious ones attributed to him. At Thomas Jefferson’s Monticello, you’ll find more info about his views on hemp too: http://bit.ly/1S891zB