Historical timeline of U.S. cannabis

The history of cannabis in the United States is a complex journey shaped by shifting social attitudes, political movements, and evolving laws. From early 20th-century prohibition to the sweeping legalization efforts of the 21st century, cannabis policy has reflected broader debates about medicine, criminal justice, and individual freedom. This timeline traces key moments in U.S. cannabis history—highlighting landmark legislation, court rulings, and cultural turning points that have shaped how the country views and regulates the plant today.

This is a work in progress.


Gov. Greg Abbott vetos bill outlawing hemp-derived THC

Texas - June 22, 2025

Gov. Greg Abbott vetoed a controversial state ban on THC products and soon after called a special legislative session, urging lawmakers to impose strict regulations instead.


Texas legalizes medical use for cannabis

Texas - June 21, 2025

Governor Greg Abbott (R) signed House Bill 46 into law, expanding the state’s limited medical cannabis program, known as the Texas Compassionate Use Program.


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