Arizona cannabis laws let adults 21 and older possess up to one ounce of marijuana and grow up to six plants at home, but consumption has to stay private, driving after use can bring a DUI on impairment alone, and federal law still treats any cannabis user as barred from owning a firearm. The recreational rules come from the voter-approved Smart and Safe Arizona Act (Proposition 207, passed in 2020); the medical program has run under the Arizona Medical Marijuana Act since 2010. Both systems draw hard lines, and stepping over one can flip a legal activity into a criminal charge.
How Much You Can Possess and Grow
If you’re 21 or older, you can legally carry up to one ounce of marijuana, and within that ounce, no more than five grams can be concentrate — wax, shatter, hash, and similar products.1Arizona Legislature. Arizona Revised Statutes Title 36 – 36-2852 Allowable Possession and Personal Use of Marijuana, Marijuana Products and Marijuana Paraphernalia That concentrate cap catches people off guard because concentrates ship in small containers that add up fast.
Between one and 2.5 ounces is a petty offense: a fine, not jail. Above 2.5 ounces, penalties escalate into criminal territory. Anyone under 21 caught with cannabis faces a civil penalty for a first offense rather than a criminal charge.2Arizona Legislature. Arizona Revised Statutes Title 36 – 36-2853
Home cultivation is legal within tight rules. A single adult can grow up to six plants. If two or more adults 21 and older share a household, the ceiling is twelve plants for the whole residence, not twelve each. Plants have to be in an enclosed area with a lock or security device that keeps minors out, and they can’t be visible from any public vantage point without binoculars or other optical aids.1Arizona Legislature. Arizona Revised Statutes Title 36 – 36-2852 Allowable Possession and Personal Use of Marijuana, Marijuana Products and Marijuana Paraphernalia A locked grow tent in a spare bedroom clears that bar. A few plants on the back patio probably doesn’t.
An adult can also give up to one ounce or up to six plants to another adult 21 or older, so long as no money changes hands and the transfer isn’t publicly advertised. Once compensation enters the picture, it becomes an unlicensed sale.
Medical Cardholders Get More
Registered medical patients get higher limits through the Arizona Department of Health Services (ADHS). Qualifying requires a debilitating medical condition certified by a physician — cancer, glaucoma, HIV/AIDS, Crohn’s disease, ALS, and conditions producing severe chronic pain, severe nausea, seizures, or persistent muscle spasms are among the recognized diagnoses, and ADHS can add more over time.3Arizona Legislature. Arizona Revised Statutes Title 36 – 36-2801 Definitions
ADHS has historically charged $150 for the card, with a reduced fee for SNAP recipients; verify the current amount on the ADHS portal before applying. The physician’s certification appointment is a separate cost, typically $100 to $300.
Cardholders can possess up to 2.5 ounces of usable marijuana in any 14-day period, with no separate concentrate cap inside that amount. Patients who live more than 25 miles from the nearest operating dispensary — measured as a straight-line radius, not driving distance — can also get authorization to cultivate up to 12 plants for personal use.4Arizona Department of Health Services. AZ Medical Marijuana Rules
Medical purchases are also exempt from the 16% excise tax that applies to recreational sales, which is one practical reason patients keep their cards after recreational legalization.
Where You Can Legally Consume
Whether you’re a medical patient or a recreational user, cannabis has to be consumed in a private space. Smoking, vaping, or eating edibles in any public place is illegal, including parks, sidewalks, streets, bars, restaurants, and concert venues. Consuming inside a vehicle is prohibited too, moving or parked, for both driver and passengers.
Private doesn’t mean unrestricted. Employers can enforce drug-free workplace policies and act on positive tests even for off-duty use. Landlords aren’t required to allow cannabis on rental properties and can write prohibition clauses into leases. Schools, daycare centers, and healthcare facilities can restrict use on their premises.
Federal property is a separate legal universe. Cannabis remains illegal under federal law, so possession or use on national park land, national forests, military bases, or federal courthouses can bring federal charges. A first offense for possession on federal land can carry up to one year in prison and a minimum $1,000 fine.5U.S.D.A. U.S. Department of Agriculture Forest Service. Cannabis Use On National Forest System Lands Arizona has a lot of federal land, so this isn’t hypothetical.
Buying From Dispensaries
The only legal way to buy cannabis in Arizona is from a state-licensed dispensary regulated by ADHS. Recreational customers show government-issued ID proving they’re 21 or older; medical patients present their ADHS registry card. Buying from any unlicensed source is illegal, period.
Arizona applies a 16% excise tax on recreational sales on top of standard state and local sales taxes. Bring cash. Because cannabis remains a Schedule I substance under federal law, major banks and card networks largely refuse to process transactions for cannabis businesses, so most dispensaries are cash-only or use cashless ATM workarounds.
Driving After Cannabis Use
Arizona’s DUI law is among the strictest in the country and applies to cannabis with the same force as alcohol. Under ARS 28-1381, you can be charged with DUI if you’re “impaired to the slightest degree” by any drug, marijuana included.6Arizona Legislature. Arizona Revised Statutes Title 28 – 28-1381 Driving or Actual Physical Control While Under the Influence There’s no THC blood-level equivalent to the 0.08 BAC standard. Any showing of impairment is enough.
The Arizona Supreme Court has carved out one protection relevant to medical patients: the mere presence of an inactive, non-psychoactive THC metabolite (carboxy-THC) is not enough for a conviction. Because those metabolites can linger for weeks, prosecutors have to show the active, psychoactive THC and prove actual impairment. A patient who used cannabis days earlier could still test positive for the inactive metabolite without being impaired.
A first-offense marijuana DUI is a Class 1 misdemeanor. Penalties include a jail sentence from 10 days to six months (a judge can suspend most of that if you complete required screening and treatment), fines between $250 and $2,500 before surcharges, and a 90-day license suspension.6Arizona Legislature. Arizona Revised Statutes Title 28 – 28-1381 Driving or Actual Physical Control While Under the Influence With Arizona’s mandatory surcharges layered on, total financial costs regularly clear $1,500. A second DUI within 84 months brings significantly harsher mandatory minimums.
Commercial Drivers Face Extra Consequences
If you hold a commercial driver’s license, a positive marijuana test triggers federal Department of Transportation rules on top of state law. You’re immediately barred from safety-sensitive duties until you complete a return-to-duty process through a substance abuse professional, and the violation sits in the federal Clearinghouse for five years.7Drug and Alcohol Clearinghouse. The Return-to-Duty Process and the Clearinghouse For a CDL holder, even legal off-duty use in Arizona can end a career.
Guns and Cannabis
This trips up more Arizona residents than almost any other cannabis issue. Federal law prohibits anyone who uses marijuana from buying, possessing, or receiving firearms or ammunition. Arizona’s legalization doesn’t change that. Under federal law, marijuana is still a Schedule I controlled substance, and any current user is classified as an “unlawful user” who can’t legally own a gun.8Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF Provides Clarification Related to New Minnesota Marijuana Law
When you buy a firearm from a licensed dealer, ATF Form 4473 asks whether you are an unlawful user of or addicted to marijuana or any other controlled substance. Answering “no” as a current user is a federal crime regardless of state law. Answering “yes” means the sale is denied. Medical cardholders sit in a particularly hard spot because the card itself is documentary evidence of current use. If you use cannabis in any form, treat firearm possession as a serious federal exposure.
Taking Cannabis Out of State or on a Plane
Cannabis cannot legally cross state lines under any circumstances, even between two states where it’s legal. That’s a federal crime the moment you cross the border. Driving product from Arizona into Nevada violates federal law even though both states allow adult use.
Air travel raises the same problem. TSA officers don’t actively search for marijuana at security, but if they find it they’re required to notify law enforcement. Whether you’re charged depends on the local response at that airport. Flying out of Sky Harbor with cannabis in a bag is a gamble that can end in a federal referral. CBD products containing no more than 0.3% THC on a dry-weight basis are the one exception, legal under the 2018 Farm Bill.9Transportation Security Administration. What Can I Bring Complete List
Within Arizona, you can transport cannabis in your vehicle, but keep it in a sealed container and don’t consume while driving or riding along. An open container of marijuana in the passenger compartment draws the same scrutiny as an open container of alcohol.
Clearing an Old Marijuana Conviction
Proposition 207 did more than legalize adult use. It also opened a path for people with certain prior marijuana convictions to petition for expungement. If your prior offense involved conduct now legal under the Smart and Safe Arizona Act — possessing an ounce or less, growing six plants at home, and similar conduct — you can file a petition with the court that handled the case.10Arizona Judicial Branch. Timeline of Marijuana-Related Initiatives in Arizona
An expungement seals the record and removes the penalties and disabilities tied to the conviction, which can matter for employment, housing, and professional licensing. Court filing fees are generally modest, and some legal aid organizations in Arizona help with the paperwork at no cost. If your record includes a marijuana conviction that would now be legal conduct, the petition is worth filing.