Minnesota Marijuana Legalization: Limits, Home Growing, and Retail

Minnesota’s marijuana legalization took effect in stages: adults 21 and older could legally possess cannabis and grow a limited number of plants at home starting August 1, 2023, and licensed retail sales to adult-use customers began in September 2024.¹² The law sets specific limits on how much you can carry, where you can use it, how you can grow it, and how employers can treat you for using it off the clock. Federal law hasn’t changed, and that matters more than most people realize.

How Much You Can Have

The possession caps depend on the form of the product and whether you’re at home or out.³

Up to two ounces of cannabis flower in public.
Up to two pounds of flower stored in your primary residence.
Up to eight grams of concentrate, in public or at home.
Edibles containing a combined total of 800 milligrams of THC or less.

Going over the two-ounce public limit is a petty misdemeanor, which is not technically a crime in Minnesota but carries a fine of up to $300.⁴ Larger amounts can rise to misdemeanor or felony charges.

You can give cannabis to another adult 21 or older, provided no money changes hands and the amount stays within the public possession caps: two ounces of flower, eight grams of concentrate, or edibles totaling 800 milligrams of THC.³ Giving cannabis to anyone under 21 is illegal in any amount, and businesses cannot hand it out as samples or promotions.

Where You Can Use It

Legal use is mostly a private-property matter. Your own home works. Someone else’s private property works if they say yes. Licensed cannabis events may permit on-site use. Everywhere else, the law is more restrictive than many new users expect.

Cannabis use is prohibited:⁵

In motor vehicles, for both drivers and passengers, similar to open-container alcohol rules. Sealed products stored in the trunk are allowed.⁶
At all public and charter schools, including grounds and school-owned vehicles.
In state correctional facilities.
Anywhere the Clean Indoor Air Act already bans smoking, including restaurants, bars, and workplaces. That prohibition covers both cannabis smoke and vapor.
Anywhere the smoke or vapor would be inhaled by someone under 18.

Federal property inside Minnesota, including military installations, VA facilities, national parks, post offices, and federal courthouses, remains off-limits.

Renters and Multifamily Housing

If you rent, expect tighter rules. Smoking and vaping cannabis is prohibited in all multifamily housing buildings, including on balconies and patios, for recreational users. Medical cannabis patients have a narrow exception.⁷ The Office of Cannabis Management can impose a $250 civil fine for violations, and neighbors can sue a landlord who fails to enforce the rules, with courts authorized to award a minimum civil penalty of $500.

Property owners may go further and prohibit all cannabis on the property, including edibles. If your lease says no cannabis, that clause is enforceable. Federally subsidized housing is stricter still: HUD bans cannabis entirely, including medical use, for anyone in public housing programs.⁷

Growing at Home

Adults 21 and older can cultivate cannabis at their primary residence. The cap is eight plants total, with no more than four mature, flowering plants at any one time. Plants must be kept in an enclosed, locked space that isn’t visible to the public, whether you grow indoors or outside.⁸

Cultivation is limited to your primary residence. Vacation homes, storage units, and second properties are out. Renters should read the lease first, since landlords can prohibit growing.

Driving Under the Influence

Driving impaired by cannabis is treated exactly like an alcohol DWI. There is no set THC blood-level threshold like the 0.08 BAC standard for alcohol. Enforcement is based on observed impairment: driving behavior, field sobriety performance, and officer documentation.⁹ Any detectable level of active THC in your blood can support a charge if impairment is documented.

A first-offense cannabis DWI is a misdemeanor carrying up to 90 days in jail and $1,000 in fines, along with an automatic 90-day license revocation. Refusing a chemical test or having aggravating factors raises the charge to a gross misdemeanor, with up to a year in jail and $3,000 in fines. Blood and urine tests for cannabis require a warrant; breath tests don’t detect THC. THC lingers in the body much longer than alcohol, so people who use regularly should understand that residual effects from earlier use can still support a charge if an officer observes impairment.

Buying It: Retail and Taxes

The Office of Cannabis Management regulates licensing, inspections, safety standards, and enforcement.¹⁰ Adult-use retail sales began in September 2024 through existing medical cannabis operators, with additional license types rolling out as the market develops.²

At the register, expect a 15 percent cannabis gross receipts tax, which the retailer may pass to buyers as a separately listed charge, on top of standard state and local sales taxes.¹¹

Your Job and Off-Duty Use

Minnesota classifies cannabis as a lawful consumable product, and employers generally cannot fire or discipline you for using it on your own time, off company premises.¹² The protection applies even though cannabis remains illegal federally.

The exceptions matter. Your employer can still act if you:

Use, possess, or are impaired by cannabis during work hours or on work premises.
Use cannabis while operating company vehicles, machinery, or equipment.
Hold a safety-sensitive position, where impairment would threaten someone’s health or safety. These roles are subject to random drug testing.
Work in a role where restricting cannabis reflects a genuine occupational requirement or a conflict-of-interest concern.
Work for an employer that would lose a federal license or federal monetary benefit by allowing cannabis use.

Drug testing is still permitted. Pre-employment testing is allowed after a formal job offer with written notice. For current employees, testing is allowed with reasonable suspicion of impairment, after workplace accidents, or randomly for safety-sensitive positions. A positive result must be confirmed by a retest, and the employee can request an independent retest of the original sample.¹² If an employer violates these protections, the remedy is a civil suit for lost wages and benefits, with attorney fees going to the winning side.

Old Convictions

The Bureau of Criminal Apprehension completed automatic expungement of 57,780 low-level cannabis records from the Minnesota Criminal History System by May 2024, nearly three months ahead of schedule.¹³ Those covered petty misdemeanor and misdemeanor convictions along with felony-level records that had been dismissed or resolved in the person’s favor. No petition was needed.¹⁴

The BCA planned a follow-up review in 2025 for qualifying records still moving through court during the initial sweep. Remaining felony-level cannabis convictions go before the Cannabis Expungement Board, which reviews each case individually to decide on expungement or resentencing based on the nature of the offense and associated conduct.¹⁵ That case-by-case process could take several years.¹³

Federal Law Hasn’t Changed

Cannabis is still a Schedule I controlled substance under federal law, and the practical consequences catch people off guard. The biggest one involves firearms: if you use cannabis, you are a prohibited person under the federal Gun Control Act and cannot legally buy, possess, or transport firearms or ammunition.¹⁶ Buying a firearm requires you to answer truthfully on ATF Form 4473 about current marijuana use, and there is no exception for state-legal recreational or medical use.

The federal conflict also affects federal employees, people with security clearances, residents of federally subsidized housing, and anyone on federal probation or parole. Cannabis use on federal property inside Minnesota can bring federal charges regardless of state law. If any of these situations describe you, federal enforcement takes priority over Minnesota’s legalization.

1
Minnesota House of Representatives. House File 100 – Adult-use Cannabis
2
Cannabis Business Times. Minnesota Dispensaries Launch Adult-Use Sales Under State Program
3
Minnesota Office of the Revisor of Statutes. Minnesota Code 342.09 – Personal Adult Use of Cannabis
4
Minnesota Office of the Revisor of Statutes. Minnesota Code 609.02 – Definitions
5
Minnesota Office of the Revisor of Statutes. Minnesota Code Chapter 342 – Cannabis
6
Minnesota Office of the Revisor of Statutes. Minnesota Code 169A.36 – Possession of Marijuana in Motor Vehicles
7
Office of Cannabis Management. Cannabis Use and Multifamily Housing
8
Minnesota Office of the Revisor of Statutes. Minnesota Code 342.09 – Personal Adult Use of Cannabis – Section: Subd. 2
9
MNDriversManuals.com. Traffic Safety and Cannabis in Minnesota
10
Office of Cannabis Management. Office of Cannabis Management
11
Minnesota Office of the Revisor of Statutes. Minnesota Code 295.81 – Cannabis Gross Receipts Tax
12
Minnesota Office of the Revisor of Statutes. Minnesota Code 181.938 – Nonwork Activities; Prohibited Employer Conduct
13
Minnesota Department of Public Safety. Adult-Use Cannabis Act: Automatic Expungements of BCA Records Complete
14
Minnesota Department of Public Safety. Minnesota Bureau of Criminal Apprehension Criminal History System
15
Minnesota Cannabis Expungement Board. Home – Minnesota Cannabis Expungement Board
16
ATF. ATF Provides Clarification Related to New Minnesota Marijuana Law