Canada’s federal Cannabis Act allows an adult to possess up to 30 grams of legal dried cannabis, or its equivalent in other cannabis classes, in a public place for non-medical purposes. Section 8 of the Act also creates separate rules for illicit cannabis, young persons and cannabis plants, so the 30-gram figure does not answer every possession question.
The 30-Gram Public Possession Limit, Precisely
Section 8(1)(a) of the Cannabis Act prohibits an individual who is 18 or older from possessing more than the equivalent of 30 grams of dried cannabis in a public place, unless the Act provides authorization. The total is calculated across all cannabis classes using Schedule 3.
The rule applies to each individual. It is not a shared 30-gram allowance for a household, couple or group.
If two adults are each legally entitled to possess cannabis under the rules that apply to them, each person’s public possession is assessed separately. You should still keep control of your own cannabis clear, especially when several people are travelling together.
The phrase “public place” also has a specific federal definition. The Cannabis Act includes places that the public can access by right or invitation. It also includes a motor vehicle located in a public place or in a place open to public view.
That definition means the public possession rules can apply in more settings than a sidewalk or park. A vehicle can fall within the federal definition.
The 30-Gram Rule Is a Public Possession Rule
Section 8(1)(a) specifically attaches the 30-gram limit to possession in a public place. It is not written as a federal 30-gram household storage limit. Other federal rules still apply to cannabis kept at home, including the prohibition on knowingly possessing illicit cannabis and the plant rules in section 8. Provincial, territorial and municipal law can also add restrictions.
If you keep cannabis at a private residence, you should check the rules in your province or territory rather than applying the public 30-gram figure automatically to private storage.
Personal cultivation has a separate federal rule. Subject to provincial, territorial and municipal restrictions, adults of legal age may grow a maximum of four cannabis plants per household for non-medical personal use. The four-plant rule applies per household, not per adult living there.
This distinction is useful.
- Public dried cannabis possession is generally capped at 30 grams per eligible individual
- Federal non-medical home cultivation is generally capped at four plants per household
- Provinces, territories and municipalities can apply added restrictions
- Cannabis known to be illicit is subject to a separate federal prohibition
How Non-Dried Forms Are Counted (Equivalency)
The 30-gram limit does not mean you can carry 30 grams of every type of cannabis.
Schedule 3 of the Cannabis Act converts different cannabis classes into dried-cannabis equivalents. You add those equivalent amounts together when checking your public possession total.
Under the current Schedule 3, 1 gram of dried cannabis is equivalent to
- 5 grams of fresh cannabis
- 15 grams of solids containing cannabis
- 70 grams of non-solids containing cannabis other than cannabis beverages
- 0.25 grams of cannabis concentrates
- 570 grams of cannabis beverages
- 1 cannabis plant seed
These ratios mean a full 30-gram dried-cannabis equivalent would correspond to 150 grams of fresh cannabis, 450 grams of cannabis solids, 2,100 grams of qualifying non-solids, 7.5 grams of concentrates, 17,100 grams of cannabis beverages or 30 cannabis plant seeds if only one class were being counted.
You should not treat those figures as separate allowances that can all be carried at once. The law requires the combined amount across classes to remain within the equivalent of 30 grams of dried cannabis.
Edibles
Solid edible cannabis generally falls within the solids category used in Schedule 3. The federal equivalency is 15 grams of cannabis solids for each 1 gram of dried cannabis equivalent.
For example, 150 grams of qualifying solid edible products represents the equivalent of 10 grams of dried cannabis for this calculation.
You would then have the equivalent of 20 grams of dried cannabis remaining before reaching the federal 30-gram public limit, assuming you possessed no other cannabis products.
Oils and Other Non-Solids
Non-solid cannabis products other than beverages can fall under the Schedule 3 category that uses 70 grams as the equivalent of 1 gram of dried cannabis. Health Canada’s public possession calculator describes this category as non-solid products other than beverages with THC concentrations within the category specified by the calculator.
Product classification can affect the calculation. If you are uncertain about how a specific product is counted, use the dried-cannabis equivalency information provided with the legal product and check the current federal rules.
Concentrates
Cannabis concentrates have a much smaller weight allowance because Schedule 3 treats 0.25 grams of concentrate as equivalent to 1 gram of dried cannabis.
That means
- 1 gram of concentrate equals 4 grams of dried cannabis equivalent
- 2.5 grams equals 10 grams of dried cannabis equivalent
- 5 grams equals 20 grams of dried cannabis equivalent
- 7.5 grams equals 30 grams of dried cannabis equivalent
If you carry concentrates together with dried flower or another cannabis class, you need to combine all of the equivalent amounts.
A person carrying 3.5 grams of concentrate would already have 14 grams of dried cannabis equivalent. Adding 16 grams of dried flower would bring the combined total to 30 grams.
Health Canada provides a public possession calculator for mixed cannabis classes, though its own legal notice says the calculator should not replace the Cannabis Act or applicable provincial and territorial law.
Youth Possession Rules
The federal rule for young persons is different from the adult public possession rule.
Section 8(1)(c) prohibits a young person from possessing more than the equivalent of 5 grams of dried cannabis. Federal policy was designed so very small amounts possessed by youth would not trigger the same federal criminal possession prohibition.
You should not read that federal 5-gram threshold as permission for a person under the provincial legal age to possess cannabis.
Provinces and territories can prohibit possession by youth even when the amount is 5 grams or less. Federal materials specifically recognize that provincial laws can prohibit possession of any amount by youth.
Ontario provides a clear example. Ontario law states that a person under 19 may not possess, consume, purchase, attempt to purchase or distribute cannabis.
If you are under the legal cannabis age where you are located, the provincial or territorial rule needs to be checked directly. The federal 5-gram provision does not override a stricter local prohibition.
Illicit Cannabis Possession as a Separate Offence
The source of cannabis can be legally important even when the amount is below 30 grams.
Section 8(1)(b) prohibits an individual who is 18 or older from possessing cannabis that the individual knows is illicit cannabis. That prohibition does not depend on the person exceeding the 30-gram public possession limit.
The Cannabis Act defines illicit cannabis as cannabis that was sold, produced or distributed by someone prohibited from doing so under federal or provincial law, or imported by someone prohibited from importing it.
This creates two separate legal questions when you possess cannabis.
First, is the quantity within the applicable possession limit?
Second, is the cannabis from a lawful source?
A small quantity does not become lawful simply because it weighs less than 30 grams if the legal requirements concerning illicit cannabis are met.
For an adult consumer, the practical approach is to obtain cannabis through sources authorized under the applicable provincial or territorial system and retain the original regulated packaging when practical.
The Cannabis Act also restricts distribution of illicit cannabis. An adult may not distribute cannabis that the person knows is illicit.
Possessing Live Plants in Public
Cannabis plants have their own possession rules under section 8.
Section 8(1)(d) prohibits an individual from possessing one or more budding or flowering cannabis plants in a public place unless authorized under the Act. The number of plants does not change that public-place rule. Even one budding or flowering plant can fall within the prohibition.
Section 8(1)(e) separately prohibits an individual from possessing more than four cannabis plants that are not budding or flowering, unless authorized.
You should also account for the Act’s definition of a public place. A motor vehicle located in a public place or open to public view can fall within that definition.
These possession rules should be read separately from home cultivation rules.
For ordinary non-medical personal cultivation, federal guidance permits a maximum of four plants per household, subject to provincial, territorial and municipal restrictions. Adults may also share up to 30 grams of personally grown dried cannabis or its equivalent with another adult of legal age, but unlicensed sale is prohibited.
You should check local cultivation law before growing. Federal permission does not remove provincial or municipal restrictions.
Where Provinces Add Their Own Limits
Federal law sets the base rules, while provinces and territories control major parts of cannabis sale, distribution and local access.
They can set rules concerning legal age, authorized sellers, public use and added possession restrictions. Federal guidance states that provinces and territories can increase the minimum age and lower possession limits.
As of September 11, 2026, the federal government lists these minimum legal ages for cannabis access.
| Province or territory | Minimum legal age |
|---|---|
| Alberta | 18 |
| British Columbia | 19 |
| Manitoba | 19 |
| New Brunswick | 19 |
| Newfoundland and Labrador | 19 |
| Northwest Territories | 19 |
| Nova Scotia | 19 |
| Nunavut | 19 |
| Ontario | 19 |
| Prince Edward Island | 19 |
| Quebec | 21 |
| Saskatchewan | 19 |
| Yukon | 19 |
The same federal government listing currently shows a public possession limit of 30 grams of dried cannabis or equivalent in every province and territory. Local law still controls other issues such as minimum age, permitted sellers and places where cannabis may be consumed.
Ontario Rules Relevant to Windsor and Essex County
If you are in Ontario, you must be at least 19 to possess recreational cannabis legally under provincial law. Ontario also states a maximum public possession amount of 30 grams of dried cannabis or equivalent.
Ontario permits up to four cannabis plants per residence for personal use when the provincial conditions are met. Ontario’s published rules require the grower to be 19 or older and use lawful starting material. Lease agreements and condominium rules can also restrict cultivation.
If you travel to another province or territory, check the rules there. Age requirements and local restrictions can change when you cross a provincial or territorial boundary even though the federal Cannabis Act still applies.
Possession and Personal Cultivation Are Separate Rules
The public possession limit and the home cultivation limit measure different things.
You may legally grow up to four plants at a residence under the federal non-medical rule when local law permits it. That does not give a household four additional 30-gram public allowances.
Likewise, the 30-gram public possession limit does not mean each adult in a home may grow four plants. Federal cultivation guidance sets the ordinary non-medical limit at four plants per household.
A simple way to keep the federal rules separate is
| Situation | Federal baseline |
|---|---|
| Adult public possession | Up to 30 g dried cannabis or equivalent per individual |
| Youth federal possession threshold | More than 5 g dried cannabis or equivalent is prohibited federally, with stricter provincial rules possible |
| Budding or flowering plants in public | Possession prohibited unless authorized |
| Non-budding or non-flowering plants | More than four prohibited unless authorized |
| Personal home cultivation | Up to four plants per household, subject to local restrictions |
| Knowingly possessing illicit cannabis | Prohibited regardless of the 30 g public threshold |
These rules come from different provisions and should be checked independently for the situation you are dealing with.
Sourcing and Legal Basis
The main federal possession rule appears in section 8 of the Cannabis Act.
The key provisions are
- Section 8(1)(a), adult public possession over 30 grams dried cannabis equivalent
- Section 8(1)(b), knowing possession of illicit cannabis
- Section 8(1)(c), youth possession over 5 grams dried cannabis equivalent
- Section 8(1)(d), budding or flowering cannabis plants in a public place
- Section 8(1)(e), possession of more than four plants that are not budding or flowering
Schedule 3 provides the dried-cannabis equivalency ratios used for different cannabis classes.
The Justice Laws version checked for this article states that the Cannabis Act consolidation is current to June 21, 2026 and that the Act was last amended on March 26, 2026. The Justice Laws site showed a page modification date of August 20, 2026 when reviewed.
Last reviewed September 11, 2026.
Cannabis laws can change. If you rely on a possession rule for a legal decision, check the current Cannabis Act, Schedule 3 and the law of the province or territory where the possession occurs.
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Disclaimer: The content provided is for general informational purposes only and should not be relied upon as medical, legal or professional advice. For any health related concerns, consult a qualified healthcare professional. It is the responsibility of each individual to understand and comply with all applicable laws and regulations.