Type 1, Type 2 and Type 3 describe cannabinoid profiles, not three legally defined kinds of hemp. In the classic chemotype framework, Type I is THC-predominant, Type II contains a more mixed THC/CBD profile, and Type III is CBD-predominant. The actual batch report matters more than the shorthand on a product page.
Type 1, Type 2 and Type 3 at a Glance
| Common label | Classic cannabinoid profile | What to expect on a COA | What the label does not prove |
|---|---|---|---|
| Type I | THC-predominant | THCA/THC dominate relative to CBDA/CBD | Legality, potency consistency, contaminant status, or how a person will feel |
| Type II | Mixed or intermediate THC/CBD | Meaningful amounts of both THCA/THC and CBDA/CBD | A fixed 1:1 ratio, legal hemp status, or predictable effects |
| Type III | CBD-predominant | CBDA/CBD dominate relative to THCA/THC | Zero THC, no intoxication risk, a negative drug test, or legal status |
The exact numerical boundaries used by sellers or researchers can differ. The durable idea is the relative CBD-to-THC chemical phenotype, not a universal retail rule that every company applies identically.
Where the Type I, II and III Framework Comes From
Research on Cannabis sativa has long identified three major chemical phenotypes based on the relative production of THC- and CBD-related cannabinoids. A 2003 genetics study crossed plants with CBD-dominant and THC-dominant chemotypes and observed three groups in later offspring: CBD-predominant, mixed CBD/THC and THC-predominant.
A 2020 study of European agricultural hemp likewise described three discrete chemotypes based on the THC/CBD relationship: THC-predominant, CBD-predominant and an intermediate chemotype. More recent chemical-profiling work continues to describe canonical Types I, II and III while noting that minor cannabinoids add more complexity than this three-part system captures.
PubMed: 2003 inheritance of chemical phenotype in Cannabis sativa · PubMed: 2020 distribution of chemotypes in European agricultural hemp · PubMed: 2026 cannabinoid chemotype profiling
Type I: THC-Predominant Flower
Type I is the THC-predominant end of the classic framework. In raw flower, much of that potential THC may appear on the laboratory report as THCA rather than delta-9 THC because acidic cannabinoid forms are abundant before heating.
That distinction matters. A label emphasizing only the measured delta-9 THC number can give an incomplete picture of the flower’s cannabinoid profile if THCA is much higher.
A Type I label should never be treated as proof that a product belongs in the federal hemp category. For any product sold as hemp, check the current legal framework and the complete cannabinoid panel rather than the seller’s type name.
Type II: Mixed THC and CBD Flower
Type II describes the intermediate or mixed chemotype. Both THC-related and CBD-related cannabinoids are meaningful parts of the profile.
Retailers sometimes use Type II as though it means exactly “1:1,” but the research concept is broader than one fixed ratio. A batch can be intermediate without matching a perfectly equal THC-to-CBD number.
Read the actual THCA, delta-9 THC, CBDA and CBD results. The ratio on one batch should not automatically be assumed for another harvest or product.
Type III: CBD-Predominant Flower
Type III is the CBD-predominant chemotype. This is the type most closely associated with what many consumers call “CBD flower.”
CBD-predominant does not mean THC-free. A Type III report can still show THCA and delta-9 THC. The relative dominance of CBD-related cannabinoids does not erase the THC-related values on the report.
That is why the product’s batch COA matters for drug-testing and legal questions. See THC-Free CBD and Non-Detect and Can CBD Cause a Positive Drug Test?.
Why “Hemp Flower Type” and “Legal Hemp” Are Different Questions
Type I, II and III are chemical-profile terms. Federal and state hemp rules are legal definitions with their own thresholds, methods, product categories and effective dates. A seller cannot make a flower legally compliant merely by calling it Type II or Type III.
For the current federal timeline and source links, use the Federal Hemp Law Status Tracker. For the broader framework, use CBD Legal Status: Federal Guide. For state-by-state product rules, check the State CBD Law Database. For product-form questions such as THCA, testing, and contaminant panels, see the CBD Flower Guide.
How to Check the Type on a Flower COA
- Confirm the product and batch. The report should match the flower you are checking.
- Find THCA and delta-9 THC. Do not read only one THC field.
- Find CBDA and CBD. Raw flower often contains substantial acidic cannabinoids.
- Compare the THC-related and CBD-related sides of the profile. That relationship is the basis of the classic chemotype idea.
- Check the units. Percent by weight and mg/g can be converted, but do not compare unlike units without doing the math.
- Check the report date and laboratory identity.
- Review contaminant panels. Cannabinoid type says nothing about pesticides, heavy metals, microbes, mycotoxins or other tested contaminants.
- Keep legal status separate. Use the law that applies to the product, place and date.
Use How to Read a CBD COA or the COA Red-Flag Checker while reading a report.
Type I, II and III Are Not the Whole Chemical Story
The three-type framework is useful because THC and CBD are major axes of cannabis chemistry. It is also incomplete. Modern analytical work can measure CBG, CBC, CBDV, CBN and other cannabinoids alongside THC and CBD.
A 2026 profiling study found that minor cannabinoids added discriminatory chemical information beyond the traditional THC/CBD classification. That is a good reason to treat Type I/II/III as a helpful shorthand, not a complete description of a flower batch.
Terpenes are another separate layer. A cannabinoid chemotype does not tell you the full terpene profile, contaminant status, freshness or storage quality.
Type 1 vs Type 2 vs Type 3 FAQ
Is Type III hemp flower THC-free?
No. Type III means CBD-predominant in the classic chemotype framework. A batch can still contain measurable THCA or delta-9 THC.
Does Type II always mean a 1:1 CBD-to-THC ratio?
No. Type II refers to an intermediate or mixed CBD/THC chemotype. Exact ratios vary, and retail usage is not perfectly standardized.
Is Type I legally hemp?
The Type I label does not answer that question. Legal classification depends on the applicable law and the product’s actual cannabinoid profile, not the marketing shorthand.
Is Type III the same as CBD flower?
Type III is the CBD-predominant chemotype and is commonly associated with CBD-dominant flower, but a batch report is still needed to know its actual CBD, CBDA, THC and THCA values.
Are Type I, II and III the same as indica, hybrid and sativa?
No. Type I/II/III describe cannabinoid chemistry. Indica, sativa and hybrid are different naming conventions and do not map cleanly onto these three chemical profiles.
Sources
- de Meijer EPM, et al. The inheritance of chemical phenotype in Cannabis sativa L. Genetics. 2003.
- Borroto Fernandez E, et al. Distribution of Chemical Phenotypes in European Agricultural Hemp Cultivars. Journal of Forensic Sciences. 2020.
- Staginnus C, et al. THCA synthase polymorphism and THC-rich Cannabis chemotypes. Journal of Forensic Sciences. 2014.
- Mayong A, et al. Hierarchical Chemotaxonomic Differentiation in Cannabis Chemovars. Plants. 2026.
Fact checked: September 5, 2026.