Is G13 indica or sativa?
The database labels opened for this guide call G13 indica. Weedmaps describes it as heavily indica-leaning, while its exact genetic parentage remains unresolved.1,2
Strain guide · lab-tested · on G13 Haze’s site
G13 strain
Also known as G-13 and G Thirteen
G13, also written G-13 or G Thirteen, is listed as an indica by Leafly and Weedmaps, but its exact pedigree is unresolved.1,2 The story that US government researchers bred it at the University of Mississippi is an unverified legend: Weedmaps says there is no reliable evidence, and Leafly says the legends are probably not true.1,2 In public state-lab data, G13 has a median total THC of 24.17% across 97 state lab tests of G13 flower, with the middle half of results between 16.40% and 27.43%; with only 97 tests, this small-sample median describes the matched samples, not every product sold as G13.3
Lab snapshot
24.17%median total THC
16.40%–27.43%middle half of tests
46.4%of tests at 25% THC or more
Limonenetop terpene, 0.71% median
97 state lab tests · download CSV
- Type (database labels)
- Indica (Leafly and Weedmaps); these are database classifications, not a verified pedigree.1,2
- Parents
- Unresolved. Weedmaps lists Afghani × Afghani but also says the exact parentage remains unknown; Sensi Seeds calls G13 an Afghan plant in one of its crosses.2,4
- THC (matched lab tests)
- 24.17% median across only 97 tests from 6 states; this small-sample median describes matched G13 samples, not a strain-wide estimate.3
- CBD (matched lab tests)
- In the small matched sample, none of the 73 tests that reported CBD reached 1%; it does not establish CBD in every G13 product.3
- Top terpenes (matched lab tests)
- limonene 0.71%, β-myrcene 0.32%, β-caryophyllene 0.19% by median in 56 tests with individual terpene values; those medians describe a subset of the 97-test small sample, not a strain-wide profile.3
Quick answers
Was G13 bred by the US government?
That is an unverified legend, not a documented fact. Leafly presents it as an account, Weedmaps says there is no reliable evidence that federal agents bred G13, and SeedFinder’s reproduced 1987 catalog hedges the alleged liberation as reputed.1,2,6
Is G13 the same as G13 Haze?
No. Barney’s Farm lists its G13 Haze version as G13 × Hawaiian Sativa.5
How much THC does G13 have?
The median total THC was 24.17% in only 97 strictly matched state-lab tests. This small-sample median describes those matched samples, not every item sold as G13; Leafly displays 20% and Weedmaps displays an 18–24% range for their database entries.1,2,3
What terpenes are in G13?
The 56 matched tests with individual terpene values put limonene 0.71%, β-myrcene 0.32%, β-caryophyllene 0.19% first by median. Those figures are a subset of the 97-test small sample and do not establish a strain-wide profile; Leafly’s own database also names myrcene as dominant.1,3
Is G13 Genius the same as G13?
Not for this guide’s lab data. Strict matching treats G13 Genius as a longer near-match name rather than plain G13; 50 G13 Genius records were excluded, so they do not change the G13 figures shown here.3
What G13 is
G13 is a strain name, not a verified pedigree. Leafly and Weedmaps classify it as indica; Weedmaps lists Afghani × Afghani in its parent field while saying the exact parentage remains unknown.1,2
The Afghan association is repeated by Sensi Seeds, which calls G13 a premium Afghani plant in its Mr Nice G13 × Hash Plant product description. That is a seed seller’s description of a cross, not documentation of the original G13 line.4
The name appears as G13, G-13, and G Thirteen. Weedmaps additionally lists Government Indica Strain 13, but that listing name does not verify the government-origin story.1,2
What sources report
Leafly’s top user-report labels are sleepy, euphoric, and relaxed; Weedmaps also presents relaxed, sleepy, and euphoric as reported effects.1,2
Leafly lists earthy, pine, and woody among reported flavors, while Weedmaps lists woody, earthy, and orange.1,2
These are source-specific user reports and publisher descriptions, not clinical findings.1,2
These are self-reports and marketing descriptions, not clinical findings.
The legend and what can be verified
The sources opened offer retellings rather than a documented breeding record. Leafly places its version in the late 1960s, while Weedmaps’ G13 Haze page relays a Barney’s Farm version set in the 1970s; the accounts also differ on agencies and route.1,2,4,6,7
This guide therefore calls the US-government / University of Mississippi story a legend in every instance. It does not state that any government agency bred G13.2,8
| What the source says | How this guide uses it |
|---|---|
| SeedFinder reproduces a Neville’s 1987 catalog line describing G-13 as an indica cutting reportedly liberated from a government research program in Mississippi.6 | An early dated retelling, not proof of origin.6 |
| Leafly says that, according to some accounts, agencies worked at the University of Mississippi and a cutting was liberated; it adds that the legends are probably not true.1 | A legend attributed to Leafly.1 |
| Weedmaps says almost none of the story can be proven and that there is no reliable evidence federal agents bred G13.2 | The clearest caveat in the strain sources opened.2 |
| Sensi Seeds presents a government-centre story as legend, while Erowid’s 2001 answer says G13 is highly unlikely to be anything but a Hollywood product.4,8 | Attributed skepticism, not a replacement origin theory.4,8 |
Erowid’s 2001 answer says NIDA contracted the University of Mississippi to produce cannabis; that does not document G13’s creation there.8
THC from matched lab samples
The G13 aggregate has median total THC of 24.17% across 97 state lab tests of G13 flower, with the middle half of results between 16.40% and 27.43%. With only 97 tests, this is a small sample: the median describes the matched samples, not the strain name everywhere it appears.3
Published database figures are useful context, not a substitute for a batch-specific result or the small-sample lab distribution below.1,2,3
24.17%median total THC
16.40%–27.43%middle half of tests
97tests, 6 states
10testing labs
| Publisher | Published THC figure | What it represents |
|---|---|---|
| Leafly | 20%1 | A strain-database display value, not a result for every product using the G13 name.1 |
| Weedmaps | 18–24%2 | A strain-page range, not a result for every product using the G13 name.2 |
The lab charts use only 97 strictly matched flower tests. Because that is a small sample, their medians describe matched records rather than every product sold as G13.3
- Small sample: only 97 strictly matched flower tests are included, so the median describes the matched samples and is not a strain-wide estimate.3
- The tests come from 6 states and date from 2017 to 2024; state releases and label matching are not a random sample of all G13 products.3
- 10 labs supplied the tests, and the small-sample aggregate reports medians and ranges rather than treating one high result as typical; the largest single-lab share was 29.9%.3
- Strict matching excluded 116 near-match records, including 50 labeled G13 Genius; G13 Haze and other longer names are not folded into the plain-G13 results.3
Terpenes in the lab subset
Individual terpene values appear in 56 matched tests, where limonene 0.71%, β-myrcene 0.32%, β-caryophyllene 0.19% lead by median. Those medians describe this subset within the 97-test small sample, not a strain-wide chemical profile.3
Leafly separately names myrcene as dominant in its Certified Strain Science block. That database ordering is reported alongside—not merged with—the public-lab subset.1
G13 terpenes, median % by weight
Genetics and a documented child
G13 has no verified parents in the sources opened for this page. Weedmaps’ Afghani × Afghani field sits alongside its statement that exact parentage remains unknown, so this guide does not draw a parent branch.2
G13 Haze is the documented child link on this site: Barney’s Farm lists its version as G13 × Hawaiian Sativa and also describes it as a G13-and-Haze cross. This guide does not generalize that breeder’s description to every G13 Haze version.5
Leafly also displays Tangerine Dream and Love Potion as G13 children, and SeedFinder currently lists many G-13 descendants. Database family lists do not establish that every longer G13 name is the original plant or a direct child.1,6
Family tree
G13
- G13 HazeG13 × Hawaiian Sativa
- Tangerine DreamLeafly lists as a child
- Love PotionLeafly lists as a child
Where to find G13
On Oct 5, 2026, Weedmaps listed G13 flower in 69 listings across 10 markets in its snapshot, with 20 listings around Newark.9 The first market with at least 10 priced eighths had a median listed eighth price of $48 across 19 items.9
- Source: Weedmaps public product listings, captured for the snapshot labeled Oct 5, 2026; the snapshot counts flower listings within 50 miles of one city per state and excludes across-state listings.9
- The name rule matches a G13 or G-13 phrase. It excludes named extensions such as G13 Haze, G13 Genius, G13 Skunk, G13 Hashplant, G13 Labs, G13 IPA, Airborne G13, 88 G13, and listed color- or fruit-prefixed forms.9
- Only flower listings count; pre-rolls and products naming a cross are excluded. A median eighth uses only 3.5 g flower items, listed prices may or may not include tax, and deals are not applied.9
- Only Weedmaps menu listings are counted, so a low count can reflect Weedmaps coverage rather than the whole legal market.9
- Disclosure: Official Cannabis’s founder co-founded Weedmaps and remains a shareholder.9
G13 timeline
This timeline separates dated publication and product records from the undated, unverified origin legend.1,2,4,6,8
- Late 1960s or 1970s (legend)Leafly places one account in the late 1960s, while Weedmaps’ G13 Haze page relays Barney’s Farm’s 1970s version. Weedmaps’ G-13 page says no reliable evidence shows federal agents bred G13.1,2,7
- 1987SeedFinder reproduces Neville’s Seed Bank catalog description of G-13 as an indica cutting reportedly liberated from a government research program in Mississippi.6
- 1999Sensi Seeds says it released Mr Nice G13 × Hash Plant, a cross that it describes as drawing on a premium Afghani G13 plant and a legend-origin story.4
- 2001Erowid publishes a response calling the G13 story highly unlikely and describes NIDA’s contract with the University of Mississippi to produce cannabis for research.8
- 2017–2024The 97 strictly matched G13 flower tests in this guide’s public-lab aggregate date from this period. The resulting median is a small-sample description of matched records, not a strain-wide estimate.3
Frequently asked questions
Is G13 indica or sativa?
Leafly and Weedmaps both classify G13 as indica. Weedmaps describes it as heavily indica-leaning but says the exact parentage remains unknown.1,2
What else is G13 called?
Leafly lists G-13 and G Thirteen. Weedmaps also lists Government Indica Strain 13, which is an alias on that database page rather than proof of a government origin.1,2
Was G13 really bred by the US government?
It cannot be verified from the sources opened for this guide. Leafly presents the account as an allegation, Weedmaps says there is no reliable evidence federal agents bred G13, SeedFinder’s reproduced 1987 wording is hedged, and Sensi Seeds calls a similar account legend.1,2,4,6
What are G13’s parents?
They are unresolved. Weedmaps has an Afghani × Afghani field but explicitly says the exact parentage is unknown, so this guide does not present that field as a verified pedigree.2
Is G13 the parent of G13 Haze?
Barney’s Farm lists its G13 Haze as G13 × Hawaiian Sativa and describes it as a G13-and-Haze cross. That establishes the sourced parent-child link for the breeder’s version.5
Is G13 Genius the same as G13?
No, not in this guide’s lab aggregation. G13 Genius is a longer near-match label that strict matching excludes from plain G13; 50 such records were excluded.3
How much THC does G13 have?
The matched-lab median is 24.17% from only 97 tests. This small-sample median describes matched G13 records, not every product sold under the name; Leafly displays 20% and Weedmaps displays 18–24% on their database pages.1,2,3
What are G13’s top terpenes?
In 56 matched tests with individual terpene values, limonene 0.71%, β-myrcene 0.32%, β-caryophyllene 0.19% lead by median. These medians describe a subset of the 97-test small sample rather than a strain-wide profile; Leafly separately names myrcene as its dominant terpene.1,3
Does G13 make people sleepy?
Leafly’s leading user-report label is sleepy, followed by euphoric and relaxed; Weedmaps also lists sleepy among reported effects. Those are self-reports and database descriptions, not clinical findings or a prediction for an individual.1,2
Where can I find G13?
Availability changes by market. The current Weedmaps snapshot labeled Oct 5, 2026 lists 69 G13 flower listings across 10 markets, with 20 around Newark; only licensed stores where cannabis is legal for you should be considered.9
Sources
- Leafly, G13 (G-13) strain information. Accessed Oct 5, 2026.
- Weedmaps, G-13 (aka Government Indica Strain 13) strain page. Accessed Oct 5, 2026.
- Cannlytics (CC BY 4.0), cannabis_results: public state lab results (filtered and aggregated by Official Cannabis). Accessed Oct 5, 2026.
- Sensi Seeds, Mr Nice G13 × Hash Plant regular seeds. Accessed Oct 5, 2026.
- Barney’s Farm, G13 Haze: feminized seed specifications. Accessed Oct 5, 2026.
- SeedFinder, G-13 (Unknown or Legendary): strain info and Neville’s 1987 catalog text. Accessed Oct 5, 2026.
- Weedmaps, G13 Haze (aka G-13 Haze) strain page. Accessed Oct 5, 2026.
- Erowid, Ask Erowid: does the cannabis (“G13”) in American Beauty really exist? (2001-10-16). Accessed Oct 5, 2026.
- Weedmaps listings, compiled by Official Cannabis, Weedmaps flower menu snapshot, 27 US markets, Oct 5, 2026. Accessed Oct 5, 2026.