The legal framework
The Cannabis Act, in force since 17 October 2018, legalised possession and purchase for adults. The Controlled Drugs and Substances Act governs all other substances. Provinces set the minimum age, the retail model and whether home growing is allowed.
The minimum age is eighteen in Alberta, nineteen in most provinces and twenty-one in Quebec. Home cultivation of up to four plants is allowed federally but banned in Quebec and Manitoba.
Public possession is capped at thirty grams of dried cannabis or the equivalent. Selling to a minor is heavily punished.
British Columbia obtained a federal exemption to decriminalise possession of small amounts of certain drugs in 2023; it was narrowed in 2024 to prohibit use in public places.
Impaired driving by drugs is a Criminal Code offence, with blood THC thresholds set by federal regulation.
Key points
| Cannabis | Legal since 17 October 2018 |
|---|---|
| Minimum age | 18 in Alberta, 19 in most provinces, 21 in Quebec |
| Home growing | Up to 4 plants federally; banned in Quebec and Manitoba |
| Public possession | 30 g dried or equivalent |
| Other drugs | Controlled Drugs and Substances Act |
In practice
- Provincial helplines and 988 for mental health crisis provide free referral.
- Supervised consumption sites operate in several provinces and have prevented deaths without a single fatal overdose on site.
- Carrying cannabis across the United States border is a federal offence there, even from a legal Canadian purchase.
Cost and coverage
Public treatment services are free; wait times vary. Private residential treatment is costly.
Recent changes
The British Columbia exemption was amended in 2024 after public debate, restricting use in public spaces while maintaining the decriminalisation of possession.
Where to go
- Provincial addiction services and 988 crisis line.
- Canadian Centre on Substance Use and Addiction, information.
- Poison centres, one per province.
- Emergencies: 911.
Worth knowing
Legality in Canada does not travel. Declaring cannabis at the United States border can result in a lifetime bar on entry.
Frequently asked questions
What is the legal age?
Eighteen in Alberta, nineteen in most provinces and twenty-one in Quebec.
Can I take cannabis to the United States?
No. It is a federal offence there and can result in a permanent entry ban.
Official sources and links
- Canada.ca — official government portal
- Justice Laws Website — federal statutes and regulations