Michigan's Booming $3 Billion Cannabis Industry Faces Pricing Challenges on 4/20 Image Cannabis News April 19, 2024 Michigan's Legal Weed Market Soars to $3 Billion, But Pricing Challenges Loom as 4/20 Approaches. Marijuana has had a growing impact on the state and with the stoner holiday of 4/20 here, let's take a look at the state's legal $3 billion weed industry. It's bigger than ever, with prices dropping and Marijuana Politics Marijuana Business News Lansing State Journal