It's the 10th state to legalize recreational pot.
It could take a year before Michigan starts licensing medical marijuana shops to sell to recreational users.
Stuart Carter showed us the products at his medical marijuana shop in Detroit.
He opposes Michigan's high possession limit, allowing people to carry up to 2.5 ounces.
One county prosecutor in Michigan told CBS News he has already dismissed 50 pending cases for misdemeanor marijuana offenders that are no longer illegal as of Thursday.