Strain names vs what's on the jar
By Shawn Hepper, Independent cannabis educator and researcher
Walk up to almost any dispensary counter and the names do most of the talking. One sounds sleepy, another sounds like rocket fuel, and a third is a "classic" you've been hearing about for years. The names are fun and easy to remember, but as a guide to what's actually inside the jar, they're unreliable.
So here's my pitch. Treat the strain name as a nickname, and shop by two things you can find on the label or the lab report instead: the terpene percentages and the dates (the harvest or packaged date if it's printed, and the best-by date that Minnesota flower labels must show). Neither one predicts how a product will make you feel. Both, however, describe something measurable about the specific batch in your hand, which is more than most names can promise.
The name isn't the plant
There's no official registry for cannabis strain names. A grower can call a batch almost anything, and a different grower can use the same name for flower with a noticeably different chemical makeup. Researchers have tested how much the names mean in several ways, and their findings point in the same direction.
The largest analysis so far. Smith and colleagues gathered lab results for close to 90,000 flower samples tested by labs in six US states, about 43,000 of which included terpene data (Smith 2022). They identified a few distinct, repeatable chemical groups, but the labels shoppers rely on matched those groups poorly. Products marked "Indica," "Sativa," and "Hybrid" were so thoroughly intermingled that a sample with one label could easily share its terpene profile with a sample carrying another. Simply sorting the samples by their most abundant terpene separated them better than the industry labels did.
Strain names were a mixed bag. For most of the names Smith's researchers could evaluate, products sharing a name were more alike than random chance would predict, yet consistency varied enormously from one name to the next. For one popular name, 96% of products fell into the same chemical group; for another, only 62.5% did. Nothing on the jar tells you which kind of name you're looking at. (One coauthor worked for Leafly, the strain database company.)
One state, hundreds of names. In Nevada, a lab survey of 2,662 medical flower samples found that the terpene data sorted into just three main chemical groups, which were being sold under 396 different names (Reimann-Philipp 2020). The authors concluded that the names created a false impression of variety that the chemistry didn't support. (The study was run by a cannabis company, GB Sciences, with researchers it funded, including a testing lab.)
The genes don't match the labels either. A research team in Canada and the Netherlands analyzed the DNA of more than 100 samples and found that "Sativa" and "Indica" samples were not genetically distinct across the genome as a whole. What did track with the labels was variation in a small number of terpenes (Watts 2021). (Bedrocan, a medical cannabis producer, funded that work.) A smaller US study bought 30 named strains from dispensaries in three states and found that most strains included at least one sample that was genetically out of line with the others. Same name, not always the same plant, though many strains were fairly stable once the outliers were set aside (Schwabe and McGlaughlin 2019).
None of these studies claims that names are pure noise, since some names really do lean toward a particular profile. The trouble is that you can't distinguish the dependable names from the loose ones just by reading the jar.
What the label can tell you
Minnesota doesn't require terpenes on flower labels. The required list includes the cannabinoid profile, the batch number, and a best-by date, but not terpenes (Minn. Stat. 342.63, subd. 2, as amended in 2026; Minn. R. 9810.1401, subp. 2; checked Oct 19, 2026). If your label doesn't list them, ask for the certificate of analysis (COA), which is the lab report for that batch, and confirm that the batch number on the package matches the one on the report. (Chapter 8 of Foundations explains how to read a COA.)
Terpenes are listed as a percent of the flower's weight, so the numbers look small. That's normal. In a large study of US lab results, the middle half of flower samples had about 1.4% to 2.5% total terpenes, and any single terpene was usually under half a percent (Smith 2022).
Here's how a made-up example label compares with those ranges. It isn't a real product. "Typical" means the middle half of tested flower.
| Terpene | On the label | Typical range (flower) | How it reads |
|---|---|---|---|
| Myrcene | 0.39% | 0.17 to 0.64% | Typical, right around the middle |
| Alpha-pinene | 0.04% | 0.03 to 0.13% | Typical, low end |
| Beta-caryophyllene | 0.08% | 0.16 to 0.44% | Low |
| Total terpenes (if listed) | not shown | about 1.4 to 2.5% | Under 1% is low, over 3% is high (see note below) |
In the same lab data, only about 1 in 10 flower samples had less than 1% total terpenes, and only about 1 in 8 had more than 3%, so we call those low and high.
Example label only, not a real product. Ranges are for flower only and don't apply to vapes, concentrates, or edibles. Canopy Talks calculated them from the public Smith 2022 dataset (25th to 75th percentile, 43,148 flower samples from six US states); the paper itself doesn't report them. The 1% and 3% cutoffs are our own, based on that data, not from the paper.
Two quick notes on reading it. First, those three numbers add up to 0.51%, but that isn't the total, because flower usually carries many more terpenes than a label lists. Compare a total only with the total row. Second, notice which terpene comes out on top. On this label it's myrcene, and that detail tells you more about the batch than whatever name is printed above it.
Why the date matters
Terpenes are volatile, meaning they evaporate easily. In one year-long lab study, terpene levels in stored flower fell under every storage condition tested (Milay 2020; Foundations Ch. 3). The terpene numbers on a label were measured on the test date, so the harvest or packaged date, if the jar shows one, tells you how old that snapshot is. The COA's test date tells you the same thing, and the best-by date gives you a rough sense of how fresh the jar is.
How quickly do terpenes fade in storage? The research is thin. One 74-day storage study found that total terpenes didn't change significantly, although individual terpenes did shift: myrcene declined in flower stored with ordinary air, while limonene and pinene declined in flower packed with nitrogen (MacLaughlin and MacDonald 2024). The date won't give you a precise figure, then. So here's my own tip, not a research finding: when two jars look alike on paper, I pick the one with the more recent date, because its label numbers are a newer snapshot. Whatever you buy, keep it sealed and away from heat.
Three cautions before you shop by numbers
- The % is not the effect. A higher number means more of that compound is in the jar, but it doesn't tell you how the product will make you feel. Most terpene research comes from lab or animal studies, and a 2024 review called the "entourage effect" unproven (André 2024). Terpenes are clues.
- Labs and batches vary. Labs don't all test the same list of terpenes, so totals aren't always directly comparable, and typical totals differed from state to state (Smith 2022). One batch can also differ from the next batch sold under the same name, so read the label on the product in your hand every time.
- Terpenes are lost over time. The number on the label is a snapshot from the test date, and the older the jar, the less you can lean on it.
The short version
Treat the name as a nickname. Read the top two or three terpenes, check the date, and match the batch to the COA. Then pay attention to how a product actually feels for you, and write it down; the log on page 2 of the free cheat sheet that comes with Foundations is designed for exactly that. Bring it to the pharmacist or certified medical cannabis consultant at your dispensary, since they're the right people to ask about amounts, timing, and how cannabis fits with any medicines you take.
Education only, not medical advice. Talk with your clinician, or the pharmacist or certified medical cannabis consultant at your dispensary, before you change anything.
Sources
- Smith CJ, Vergara D, Keegan B, Jikomes N. The phytochemical diversity of commercial Cannabis in the United States. PLoS One. 2022;17(5):e0267498. PMID 35588111; PMC9119530; doi:10.1371/journal.pone.0267498. Conflict note: one author was employed by Leafly Holdings. Typical ranges in the table were calculated by Canopy Talks from the authors' public dataset (
preproc_lab_data_pub_20220218.csv, downloaded Oct 19, 2026), 43,148 flower samples with terpene data; the paper does not report these ranges. The public file has 305 more terpene samples than the paper's cleaned count of 42,843, all from Oregon (12,025 in the file vs 11,720 in the paper's Table 1). Total terpenes, 25th to 75th percentile: 1.37 to 2.48%, shown rounded as 1.4 to 2.5%. The 1% and 3% cutoffs are our own cutoffs, based on that data (in the file, about the bottom 9.5% and top 12.5% of samples). - Reimann-Philipp U, Speck M, Orser C, et al. Cannabis chemovar nomenclature misrepresents chemical and genetic diversity; survey of variations in chemical profiles and genetic markers in Nevada medical cannabis samples. Cannabis Cannabinoid Res. 2020;5(3):215-230. PMID 32923659; PMC7480732; doi:10.1089/can.2018.0063. Conflict note (PubMed conflict of interest statement): two authors (U.R.-P., A.L.S.-H.) were GB Sciences employees; five other authors (M.S., C.O., S.J., A.H., H.T.) received research funding from GB Sciences. The statement does not mention the eighth author (A.J.S.).
- Watts S, McElroy M, Migicovsky Z, Maassen H, van Velzen R, Myles S. Cannabis labelling is associated with genetic variation in terpene synthase genes. Nat Plants. 2021;7(10):1330-1334. PMID 34650264; PMC8516649; doi:10.1038/s41477-021-01003-y. Conflict note: funded by Bedrocan; two authors were Bedrocan employees.
- Schwabe AL, McGlaughlin ME. Genetic tools weed out misconceptions of strain reliability in Cannabis sativa: implications for a budding industry. J Cannabis Res. 2019;1(1):3. PMID 33526091; PMC7815053; doi:10.1186/s42238-019-0001-1.
- MacLaughlin LL, MacDonald MT. Is nitrogen-modified atmosphere packaging a tool for retention of volatile terpenes and cannabinoids in stored Cannabis sativa inflorescence? J Cannabis Res. 2024;6(1):42. PMID 39707520; PMC11660729; doi:10.1186/s42238-024-00253-9.
- André R, et al. The entourage effect in cannabis medicinal products: a comprehensive review. Pharmaceuticals (Basel). 2024;17(11):1543. PMID 39598452; doi:10.3390/ph17111543.
- Hepper S. Understanding Medical Cannabis: Foundations (v1.4.3). Verdant Canopy; 2026. Chapter 3 (Reading labels and lab reports for terpenes; Heat and terpene loss) and Chapter 8 (The certificate of analysis).
- Minnesota Statutes, section 342.63, subdivision 2 (cannabis flower labeling), as amended by Laws 2026, chapter 123, section 108. Lists the cannabinoid profile; no terpene requirement. https://www.revisor.mn.gov/statutes/cite/342.63 (read Oct 19, 2026).
- Minnesota Rules, part 9810.1401, subpart 2 (dried flower labels: cannabinoid profile, strain or cultivar name, best-by date; no terpene requirement), and parts 9810.1400 and 9810.1402. https://www.revisor.mn.gov/rules/9810.1401/ (read Oct 19, 2026).
- Milay L, Berman P, Shapira A, Guberman O, Meiri D. Metabolic profiling of cannabis secondary metabolites for evaluation of optimal postharvest storage conditions. Front Plant Sci. 2020;11:583605. PMID 33178249; PMC7593247; doi:10.3389/fpls.2020.583605.
PubMed records for sources 1 to 6 and 10 were checked on PubMed on Oct 19, 2026 (CT). Sources 8 and 9 were checked on revisor.mn.gov on Oct 19, 2026 (CT).