Colorado Cannabis Laws 2026: What's Legal for Adults and Patients

Colorado voters legalized medical cannabis with Amendment 20 in 2000 and recreational cannabis with Amendment 64 in 2012. On January 1, 2014, Colorado became the first state to open licensed adult-use stores. The Marijuana Enforcement Division (MED) regulates the market.

Is weed legal in Colorado?

Yes, for adults 21 and older. Bring a valid ID showing you're 21+. Visitors can buy too. Keep in mind that about two-thirds of Colorado's cities and towns have opted out of retail sales, so stores are concentrated in places like Denver.

How much can you buy and carry?

Limit	Adults 21+	Medical patients
Possession	Up to 2 ounces	Up to 2 ounces (more with a doctor's recommendation)
Purchase per visit	Up to 1 ounce of flower, 8 grams of concentrate, or 800 mg of THC in edibles	Based on your certification

Where can you use it?

Private property, with the owner's permission. Using cannabis in public, including sidewalks, parks, ski areas, concert venues, bars and restaurants, is a petty offense with a fine up to $100 and up to 24 hours of community service. Shared areas of apartment buildings count as public.

The legal alternative is a licensed marijuana hospitality business (a consumption lounge), allowed since 2019 in cities that permit them. Remember that a lot of Colorado is federal land: national parks and national forests are off-limits.

Can you grow cannabis at home?

Yes, no permit needed. Each adult 21+ can grow up to 6 plants, with no more than 3 flowering at once. A single home is generally limited to 12 plants, no matter how many adults live there, and some cities set lower limits. Plants must be in an enclosed, locked space and not grown openly or publicly.

Medical cannabis in Colorado

Patients with a qualifying condition can get a medical marijuana registry card ("red card") through the state health department. Patients can be under 21 with a caregiver, and medical purchases skip the 15% retail marijuana taxes.

Taxes on cannabis in Colorado

Retail cannabis carries a 15% state retail marijuana sales tax at the register, plus any local taxes (many cities add their own). There's also a 15% excise tax charged when cannabis is sold wholesale from growers, which is built into shelf prices. Medical cannabis is exempt from both 15% taxes but pays the regular 2.9% state sales tax.

Driving, work and housing

• Driving: Driving impaired is illegal. A driver with 5 nanograms or more of active THC per milliliter of blood can be presumed impaired.
• Work: Employers can still ban cannabis and fire employees for using it, even off the clock.
• Housing: Landlords can ban smoking and growing.

Old marijuana convictions

Colorado's governor has issued mass pardons for past low-level possession convictions (in 2020 for up to 1 ounce, and in 2021 for up to 2 ounces), and state law lets people ask the court to seal eligible records.

Is anything changing in 2026?

No changes to Colorado's adult-use possession or home-grow limits took effect in 2026 that we're aware of. Lawmakers continue to debate the tax structure and rules for hemp-derived THC products.

Federal law in 2026

Federal law still treats recreational cannabis as illegal. In April 2026, the federal government moved marijuana sold under a state medical license (and FDA-approved cannabis medicines) to Schedule III, but adult-use cannabis is still Schedule I. That means it's still banned on federal land and can't legally cross state lines, even between two legal states.

Separately, a federal ban on intoxicating hemp products takes effect in two steps: synthetic and converted cannabinoids like delta-8 lose their legal status on November 12, 2026, and naturally derived hemp THC (THCA flower, hemp delta-9 edibles and drinks) on December 11, 2026.

Where to buy legally

Browse dispensaries in Colorado in our directory, including Denver, Colorado Springs and Aurora.

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Last reviewed October 8, 2026. This guide is general information, not legal advice. Laws change, so check the official sources below before you rely on any detail.