Colorado Marijuana Laws (2026): A Beginner’s Guide
The Complete Guide to the Legal Status of Marijuana in Colorado
Quick answer: Yes, marijuana is legal in Colorado for adults 21 and older, and the state has a long-running medical program too. Adults can possess up to 2 ounces, though stores only sell up to 1 ounce of flower per day. You can grow up to 6 plants (3 flowering), with no more than 12 per home, but public use is still against the law.
Last verified: October 20, 2026, against the State of Colorado’s official cannabis site and the Colorado Marijuana Enforcement Division. Laws change, so check the official site before you travel or buy.
| Recreational | Yes. Voters passed Amendment 64 in 2012; stores opened January 1, 2014 |
|---|---|
| Medical | Yes, since 2000 (Amendment 20) |
| Minimum age | 21 (younger patients need a medical card) |
| Possession limit | 2 ounces. Store sales capped at 1 ounce of flower per day |
| Home grow | 6 plants per adult (3 flowering); 12 per residence in most cases |
| Public use | Not allowed (petty offense). Licensed hospitality spaces exist in some cities |
| Driving limit/DUI rule | 5 ng/mL of THC in whole blood lets a jury infer impairment |
| Medical card for visitors | No. Colorado’s registry is for residents; adults 21+ can shop adult-use |
Who can buy?
Any adult 21 or older with a valid government photo ID. Visitors are welcome, and out-of-state IDs and passports work. Colorado made history in November 2012, when voters passed Amendment 64. On January 1, 2014, it became one of the first places in the world with legal adult-use cannabis stores.
Colorado’s medical program dates back to Amendment 20 in 2000. Residents with a qualifying condition and a doctor’s certification can join the state Medical Marijuana Registry, run by the Colorado Department of Public Health and Environment. Patients pay lower taxes and can access higher purchase limits. Check the official site for the current application fee.
Federal context: recreational marijuana is still illegal federally (Schedule I). In April 2026, state-licensed medical marijuana and FDA-approved products were moved to Schedule III, and broader rescheduling was paused on September 29, 2026.
Where can you buy?
At retail marijuana stores licensed by the state Marijuana Enforcement Division and approved by local governments. Plenty of Colorado towns and counties ban stores, so availability varies, especially in rural areas. Some local governments allow licensed delivery too.
How much can you buy or possess?
Since 2021, adults 21 and older can legally possess up to 2 ounces of marijuana. The daily sales limit at adult-use stores is lower. In one day, a store can sell you up to:
- 1 ounce of flower, or
- 8 grams of concentrate, or
- edibles with up to 800 mg of THC.
A bill to raise the daily purchase limit was debated in 2025, but the increase was stripped out, so the 1-ounce cap still stands.
Can you grow your own?
Yes. Adults can grow up to 6 plants, with no more than 3 flowering at a time, in an enclosed, locked space that isn’t open to public view. A residence is capped at 12 plants no matter how many adults live there, unless a local government allows more. Many cities and counties have stricter rules, and landlords can say no. Whatever you harvest can stay where it was grown.
Setting up a legal grow? Start with how many plants you can grow in Colorado, then see our beginner guides to LED grow lights, grow tents and leaf trimmers.
Where can you smoke?
On private property, with the owner’s permission. Consuming openly and publicly is a petty offense, punishable by a fine of up to $100 and up to 24 hours of community service. Public places include:
- Streets, sidewalks, parks and ski areas
- Bars, restaurants and concert venues
- Most hotel rooms and rental cars
- National parks and national forests, which are federal land
The legal exception is a licensed marijuana hospitality business, where local governments allow it. A small number of these lounges operate, mostly in larger cities like Denver.
Can you drive after using?
Don’t. In Colorado, if your blood contains 5 nanograms or more of THC per milliliter, a jury can infer that you were driving under the influence. Officers can also arrest you at lower levels if you seem impaired. Open containers of marijuana in the passenger area of a car are illegal too, so keep products sealed and out of reach.
Can you take it out of state?
No. Taking marijuana across state lines is a federal crime, and that includes trips to New Mexico and other legal states. Denver International Airport bans marijuana on its property, and most neighboring states don’t allow adult-use cannabis. Buy what you’ll use while you’re here.
Can your employer fire you?
Yes. Colorado’s legalization amendment lets employers keep drug-free workplace policies, and in a well-known 2015 case, the Colorado Supreme Court ruled that a medical marijuana patient could be fired for off-duty use. Some employers choose not to penalize off-duty use, but the law doesn’t require them to.
Penalties, briefly
- More than 2 up to 6 ounces: Misdemeanor, up to 364 days in jail and a $1,000 fine.
- More than 6 ounces: Higher-level misdemeanor or felony, depending on the amount and intent.
- Public consumption: Petty offense, up to $100 and 24 hours of community service.
- Growing more than 6 plants: Can be a felony.
- Selling without a license: Misdemeanor for small amounts, felony for more.
About hemp: the federal hemp law passed in November 2025 ends legal status for intoxicating hemp-THC products such as delta-8 and THCA flower, with its main provisions taking effect December 11, 2026. Colorado already regulates these products closely, so licensed marijuana stores remain the reliable option.
Compare Colorado with other states on our marijuana law hub.
Colorado marijuana law FAQ
How much weed can you buy in Colorado?
At a Colorado adult-use store, you can buy up to 1 ounce of flower, 8 grams of concentrate or 800 mg of THC in edibles per day. Adults 21 and older can legally possess up to 2 ounces.
Can tourists buy weed in Colorado?
Yes. Any adult 21 or older with valid government photo ID can buy marijuana at a licensed Colorado store, whether they live in Colorado or not. Visitors follow the same purchase limits and the same ban on public use.
Where can tourists smoke weed in Colorado?
Tourists can use marijuana on private property where the owner allows it, or at a licensed marijuana hospitality business where one exists. Public use, including in parks, on ski slopes and in most hotel rooms, is not allowed.
What is the THC driving limit in Colorado?
In Colorado, a blood level of 5 nanograms of THC per milliliter or more allows a jury to infer that a driver was impaired. Drivers can also be charged at lower levels if they show signs of impairment.
How many marijuana plants can you grow in Colorado?
Adults 21 and older in Colorado can grow up to 6 plants, with no more than 3 flowering at once, in an enclosed and locked space. Most homes are capped at 12 plants total, and local rules can be stricter.
