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Drug Crimes 7 min read February 2026

California Marijuana Laws: What's Legal and What's Still a Crime

Despite legalization, many marijuana activities remain illegal in California. Understanding the boundaries can prevent costly criminal charges.

Proposition 64, passed in 2016, legalized recreational marijuana for adults 21 and over in California. However, the law created a complex regulatory framework with numerous restrictions. Many Californians are surprised to learn that activities they assume are legal can still result in criminal charges.

What's Legal Under Prop 64

Adults 21 and older can legally:

  • Possess up to 28.5 grams (1 ounce) of marijuana flower
  • Possess up to 8 grams of concentrated cannabis
  • Cultivate up to 6 plants per residence (not per person)
  • Consume in private residences
  • Purchase from licensed dispensaries
  • Gift up to 28.5 grams to another adult (without compensation)

What's Still Illegal

Many marijuana-related activities remain criminal offenses:

  • Selling without a license (any amount)
  • Possessing more than 28.5g flower or 8g concentrate
  • Growing more than 6 plants
  • Smoking in public places
  • Smoking while driving or in a moving vehicle
  • Possessing on school grounds or near children
  • Providing to anyone under 21

Common Marijuana Offenses and Penalties

OffenseClassificationPenalty
Possession over 28.5g (adult)MisdemeanorUp to 6 months, $500
Possession by under-21InfractionDrug education, community service
Growing more than 6 plantsMisdemeanorUp to 6 months, $500
Unlicensed sale (under 28.5g)MisdemeanorUp to 6 months, $500
Unlicensed sale (over 28.5g)Felony16 months - 3 years
Sale to minorFelony3, 5, or 7 years

Where You Cannot Consume

Even legal marijuana cannot be consumed everywhere. Public consumption remains an infraction punishable by fines:

Prohibited Locations

  • • Any public place
  • • Within 1,000 feet of schools
  • • Daycare centers
  • • Youth centers
  • • Anywhere tobacco is prohibited
  • • Federal property

Vehicle Restrictions

  • • Cannot smoke while driving
  • • Cannot smoke as passenger
  • • Open container rules apply
  • • Must transport in trunk or sealed container
  • • DUI laws fully apply

Marijuana DUI

Driving under the influence of marijuana remains illegal, and California has no legal limit like the 0.08% BAC for alcohol. Prosecutors must prove impairment through:

  • Officer observations (driving pattern, demeanor, physical symptoms)
  • Field sobriety tests
  • Drug Recognition Expert (DRE) evaluation
  • Blood test showing THC presence (though levels don't prove impairment)

THC Can Stay in Your System for Weeks

Unlike alcohol, THC is fat-soluble and can be detected in blood for days or even weeks after use. A positive THC blood test does not prove impairment at the time of driving. This is a significant defense issue in marijuana DUI cases.

Cultivation Rules

California allows adults to grow up to 6 plants per residence, but there are important restrictions:

1
Indoor GrowingPlants must not be visible from public places and must be in a locked space
2
Outdoor GrowingMust comply with local ordinances—many cities prohibit outdoor cultivation entirely
3
Quantity Limits6 plants total per residence, regardless of how many adults live there
4
Harvest LimitsCan possess all marijuana produced by your 6 plants, even if over 28.5g

Federal Law Conflict

Despite state legalization, marijuana remains a Schedule I controlled substance under federal law. This creates issues including:

  • Cannot possess on federal property (national parks, VA hospitals, etc.)
  • Federal employees may face employment consequences
  • Security clearances can be affected
  • Immigration consequences remain (even for legal state use)
  • Cannot transport across state lines

Key Takeaways

  • Adults 21+ can possess 28.5g flower and 8g concentrate legally
  • Public consumption remains illegal and results in fines
  • Unlicensed sales are criminal offenses, regardless of amount
  • Marijuana DUI has no per se limit—impairment must be proven
  • Federal law still classifies marijuana as illegal Schedule I

If you're facing marijuana charges, understanding the law is just the first step.

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