Michigan cannabis history
Reviewed
Voters approved Proposal 18-1 on November 6, 2018. The initiated law took effect December 6, 2018. A state brochure says the first marijuana retailers opened to the public on December 1, 2019.
This is a short history, not legal advice. The rules that apply today are on the Michigan cannabis laws page. A date is included only when the linked page states it.
At a glance
December 4, 2008The medical act is marked Initiated Law 1 of 2008, effective December 4, 2008.
November 6, 2018The compiler’s notes say Proposal 18-1 was approved 2,356,422 for and 1,859,675 against.
December 1, 2019The Cannabis Regulatory Agency brochure dates the public opening of the first retailers to December 1, 2019.
Medical use
- The Bureau of Elections lists Proposal 08-1, to authorize marijuana for medical purposes, as adopted in 2008, with 3,006,820 yes and 1,790,889 no. The table says elections are in November unless otherwise specified.
Proposal 18-1
- The compiler titles Initiated Law 1 of 2018, the Michigan Regulation and Taxation of Marihuana Act, effective December 6, 2018.
- The brochure is the page used for the public opening. A November 27, 2019 licensing release described transfers into retailer inventory and is not restated here as a different opening day.
Sources
- Initiated Law 1 of 2018, the Michigan Regulation and Taxation of Marihuana Act, effective December 6, 2018
- November 27, 2019 licensing release
- Initiated Law 1 of 2008, effective December 4, 2008
- adopted in 2008, with 3,006,820 yes and 1,790,889 no
Citations were checked against the linked pages on October 24, 2026. Claims without a statute, election result, regulator page, court opinion, or news report were left out.