Ask ten people the difference between hemp and marijuana and you'll get ten answers. Different species. Male and female plants. One for rope, one for getting high. Most of them are wrong, or only half right.
Here's the part almost nobody says plainly: hemp and marijuana are the same plant. Both are Cannabis sativa. The difference isn't botanical, it's legal, and in Canada it comes down to a single number.
The short answer: Hemp and marijuana are the same species, Cannabis sativa. In Canada, a cannabis plant is legally "industrial hemp" if its leaves and flowering heads contain 0.3% THC or less. Above 0.3%, it's regulated as cannabis (marijuana). Hemp is grown for fibre, seed and CBD; marijuana is grown for THC. CBD is regulated under the Cannabis Act no matter which plant it comes from.
One Plant, Two Legal Definitions
Canada regulates both hemp and marijuana under the Cannabis Act. What separates them is a set of rules within it called the Industrial Hemp Regulations.
Under those rules, industrial hemp is a cannabis plant, or any part of it, whose leaves and flowering heads contain no more than 0.3% THC by weight. Anything above that line is regulated as cannabis, with all the licensing, packaging and sales rules that come with it.
Three details make the Canadian definition sharper than most explanations suggest:
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It measures the leaves and flowers. Not the stalk or the seed, which naturally carry very little THC. The test targets the parts of the plant where THC actually builds up.
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It counts THCA too. Raw cannabis contains mostly THCA, which turns into THC when heated. The regulations require testing to account for that conversion, so a plant can't slip under the line by being tested raw.
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Hemp grain products have their own, much stricter limit. Foods and oils made only from hemp grain are exempt from the Cannabis Act if they contain 10 µg/g THC or less. That's 10 parts per million, or 0.001%.
Only Health Canada–approved hemp cultivars can be grown, and growers need a licence. That's why a hemp field and a cannabis grow can look nearly identical yet sit under completely different rules.
The Four Kinds of Cannabis Plant People Mean
"Hemp vs marijuana" sounds like two things. In practice, growers breed Cannabis sativa for four quite different jobs.
1. Fibre Hemp
Tall, thin, densely planted and harvested for the stalk. The fibre goes into textiles, rope, paper, insulation and composite building materials, and the woody core (hurd) into animal bedding and hempcrete. These plants put their energy into height, not flowers, so THC stays very low.
2. Seed (Grain) Hemp
The crop behind most Canadian hemp. It's grown for its seeds, which are sold as hemp hearts, pressed into hemp seed oil, or milled into protein powder and flour. Hemp seeds don't contain meaningful cannabinoids on their own; any THC in seed products comes from contact with the flowers during harvest, which is why the 10 µg/g limit exists.
3. CBD Hemp
Bred to produce lots of CBD-rich flowers while staying under 0.3% THC. It looks and smells much more like marijuana than fibre hemp does. In Canada, the flowers and leaves can only be sold to a licensed cannabis processor, who extracts the CBD. More on that below.
4. Drug-Type Cannabis (Marijuana)
Bred for high THC, often 15 to 30% in modern flower. Grown for its flowers, in conditions that maximise resin. This is what's sold as dried flower, pre-rolls, hash, concentrates, vapes and edibles in Canada's cannabis market.
The first three are all "hemp" legally. Only the fourth is "marijuana". But chemically, CBD hemp and drug-type cannabis are close cousins, and the line between them is one lab result.
Hemp vs Marijuana: Side by Side
| Fibre hemp | Seed hemp | CBD hemp | Marijuana | |
|---|---|---|---|---|
| Species | Cannabis sativa | Cannabis sativa | Cannabis sativa | Cannabis sativa |
| THC in leaves and flowers | 0.3% or less | 0.3% or less | 0.3% or less | Above 0.3%, often 15–30% |
| Grown for | Stalk fibre | Seeds | CBD-rich flowers | THC-rich flowers |
| Typical products | Textiles, rope, hempcrete | Hemp hearts, seed oil, protein | CBD oils and extracts | Flower, hash, vapes, edibles |
| Intoxicating? | No | No | No | Yes |
| Canadian rules | Industrial Hemp Regulations | Industrial Hemp Regulations; grain foods exempt at 10 µg/g THC or less | Grown as hemp; CBD regulated under the Cannabis Act | Cannabis Act |
Where CBD Fits Under Canadian Law
This is the point most hemp articles get wrong. In Canada, CBD is regulated as cannabis, wherever it comes from.
Health Canada is explicit: all phytocannabinoids, including CBD, fall under the Cannabis Act, and the law makes no distinction between CBD from hemp and CBD from high-THC cannabis. So:
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A hemp farmer can grow CBD hemp under a hemp licence.
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They can sell the flowers and leaves to a licensed cannabis processor.
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They can't extract the CBD themselves unless they also hold a cannabis processing or research licence.
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CBD oils and other CBD products sold to consumers must meet all the same rules as other cannabis products.
The practical upshot: a "hemp CBD oil" isn't a different legal category from a cannabis CBD oil in Canada. It's cannabis.
Hemp seed foods are the opposite. Hemp hearts and hemp seed oil made only from the grain sit outside the Cannabis Act as long as they stay at 10 µg/g THC or less. That's why you'll find them in grocery stores.
Canada vs the United States
The US uses the same 0.3% number, but it has measured it differently. The 2018 Farm Bill counted only delta-9 THC, which left room for high-THCA "hemp" flower and intoxicating products like delta-8 to be sold as hemp.
That's changing. A federal law signed in November 2025 redefines hemp by total THC, including THCA, and caps final hemp cannabinoid products at 0.4 mg of total THC per container. It's scheduled to take effect on November 12, 2026, though Congress has debated delaying it.
Canada has counted the THCA conversion from the start, and treats CBD as cannabis rather than hemp. If you read American articles about "legal hemp THC", most of it doesn't apply here.
Common Myths About Hemp and Marijuana
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"Hemp is the male plant, marijuana is the female." No. Both hemp and drug-type cannabis have male and female plants. The legal line is THC content, not sex.
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"Hemp is sativa, marijuana is indica." Also no. Indica and sativa are informal strain labels, and both hemp and marijuana are Cannabis sativa as a species. Neither label has any bearing on legal status.
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"You can get high from hemp." Not from legal hemp. At 0.3% THC or less, smoking or eating hemp flower won't produce a meaningful high.
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"Hemp seed oil is CBD oil." It isn't. Hemp seed oil is pressed from seeds and contains essentially no CBD. CBD oil is extracted from flowers and leaves. They're regulated completely differently in Canada.
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"Hemp CBD is legal everywhere, cannabis CBD isn't." In Canada, both are cannabis under the law.
Shopping for Cannabis in Canada
If you're after THC, you're shopping for cannabis, not hemp, and the labels will tell you which is which. At Uper Weed, every product lists its THC and CBD so you know exactly what you're buying, from flower and hash to edibles and concentrates.
Looking for an online cannabis dispensary Canada residents can order from in every province and territory? Uper Weed ships discreetly to adults of legal age, with plain-language guides on everything from cannabinoids to product formats.
Frequently Asked Questions
They're the same plant species, Cannabis sativa. In Canada, the legal difference is THC: hemp has 0.3% THC or less in its leaves and flowering heads, and marijuana has more. Hemp is grown for fibre, seed and CBD; marijuana is grown for THC.
No. Legal hemp contains 0.3% THC or less, far too little to produce a meaningful high. Modern marijuana flower often contains 15 to 30% THC.
CBD is legal in Canada, but only when sold in compliance with the Cannabis Act. Health Canada regulates CBD as cannabis regardless of whether it comes from hemp or high-THC cannabis.
No. Hemp seed oil is pressed from seeds and contains essentially no CBD, so it's sold as a food. CBD oil is extracted from flowers and leaves and is regulated as cannabis.
0.3% THC or less by weight in the leaves and flowering heads, with testing that accounts for THCA converting to THC. Hemp grain products must contain 10 µg/g THC or less to be exempt from the Cannabis Act.
In Canada, yes. Industrial hemp is the legal term for cannabis plants that meet the 0.3% THC threshold, whether they're grown for fibre, seed or CBD.
Yes. Commercial hemp growers need an industrial hemp licence from Health Canada and must plant approved cultivars.
The US also uses 0.3%, but has historically measured only delta-9 THC. A new federal definition based on total THC, including THCA, is scheduled to take effect on November 12, 2026.
The Short Version
Hemp and marijuana are one species with two legal names. In Canada, 0.3% THC in the leaves and flowering heads is the entire dividing line.
Below it, the plant is industrial hemp, grown for fibre, seed or CBD. Above it, it's cannabis. And because CBD is regulated as cannabis no matter its source, the only hemp products that sit fully outside cannabis rules are the ones made from seed: hemp hearts, hemp seed oil and protein.
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