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The Official Cannabis collection · sheet 13No 13 · G13 HazeGenetics

Genetics

Is G13 Haze indica or sativa? Its genetics and family tree

G13 Haze is a sativa-dominant hybrid whose breeder, Barney’s Farm, lists G13 × Hawaiian Sativa; Leafly says G13 × Haze, and Weedmaps and AllBud say Hawaiian Haze.1,2,3,4 G13 itself is an indica with no verified pedigree: its government-laboratory origin is a legend that Weedmaps says cannot be proven.5,6

Family tree

  • G13Indica; origin a legend; an Afghani-type clone per Weedmaps and Sensi Seeds
  • Hawaiian SativaPer Barney’s Farm; Leafly says Haze, Weedmaps and AllBud say Hawaiian Haze

G13 Haze

  • XJ-13G13 Haze × Jack Herer
  • Connie ChungLA Flavor × G13 Haze
  • G13 Haze Buddha’s SisterG13 Haze × Buddha’s Sister
  • G13 Haze CitralahG13 Haze × Citralah
  • G13 Haze Free TibetG13 Haze × Free Tibet
  • Devil’s HazeG13 Indica × G13 Haze
Parents as named by Barney’s Farm, with Leafly’s Haze noted; offspring as reported by Leafly and SeedFinder.1,2,7,8,9

The two parents

G13 is an indica that Leafly users call sleepy, euphoric and relaxed and that Weedmaps lists as Afghani × Afghani, an old-school cultivar of unknown exact parentage; Sensi Seeds calls it “a premium Afghani plant”, and Mr Nice says its G13 is predominantly Afghan and was only ever available as a female clone.5,6,10,11 SeedFinder counts 125 direct descendants, and the earliest dated description it reproduces is Neville’s 1987 Seed Bank catalog, which calls G-13 “an outstanding indica cutting reputedly ‘liberated’ from the government research program in Mississippi”.12

The sativa side is less clear. Barney’s Farm’s genetics field says Hawaiian Sativa, which Weedmaps describes as a family of island landraces (Maui Wowie, Kona Gold, Kauai Electric) with roughly ten weeks of flowering; the breeder does not say which line it used.1,13 Haze, the parent Leafly names, took root in Santa Cruz in the 1960s from Colombian, Mexican, Thai and South Indian genetics and was later backcrossed and stabilized in Amsterdam by Nevil, according to High Times.2,14,15

Which Haze? Five accounts

Sources agree on G13 but not on the other parent, and other breeders sell different G13 × Haze crosses under the same name.

Second parentWho says so
Hawaiian SativaBarney’s Farm’s genetics field on both seed entries; AllBud’s entry for the Barney’s version1,16,17
HazeLeafly; Barney’s Farm’s own regular-seed description (“the cross of G13 and Haze”)2,16
Hawaiian HazeWeedmaps; AllBud’s main entry3,4
Haze IBL (Santa Marta Gold × Wacky Weed × Colombian lines)Mr Nice Seedbank, for its own version by Nevil and Shantibaba11
Neville’s Super HazeSoma Seeds, for its own version: “It was crossed to a Super Haze by Neville”9

Weedmaps also relays a longer Barney’s Farm account in which G13 was first combined with Skunk #1 for stability and the result crossed with a Hawaiian Sativa; no Barney’s Farm page we opened mentions Skunk #1.3

Where G13 comes from: a legend, not a pedigree

Every account of G13’s origin traces back to a story, not a document. The accounts below are given as each source tells them.

AccountWho says so
“An outstanding indica cutting reputedly ‘liberated’ from the government research program in Mississippi, and now we have it”Neville’s Seed Bank catalog, 1987, as reproduced by SeedFinder12
“According to some accounts”, the CIA, FBI and other agencies bred super hybrids at a “super-secret installation” at the University of Mississippi in the late 1960s, and a technician liberated a single cuttingLeafly5
“The first (and, so far, only) known strain to be bred by the US government” at the University of Mississippi, “secretly procured and brought to Holland circa 1986” (stated as fact)High Times, 201415
“A government Indica” allegedly developed by the US federal government in the 1970sWeedmaps, relaying Barney’s Farm3
“Rumored to have been created from a 1970’s secret US federal medical marijuana distribution program”AllBud, entry for the Barney’s Farm version17
“A premium Afghani plant that (according to legend) was smuggled out of a government research centre by a technician”Sensi Seeds10
“Supposedly” taken from a US government research facility; the author is skepticalLeafly’s sponsored grow guide, 201718
“One of cannabis’s all-time great origin stories”, of which “almost none of it can be proven”; “no reliable evidence that federal agents actually bred G13”Weedmaps6
“Highly unlikely that ‘G13’ is anything but a Hollywood product”; the government’s own University of Mississippi cannabis tested at roughly 2–5% THCErowid, 200119
A story probably created by growers to promote the plant, told in Santa Cruz as a hybrid “stolen from the CIA back in the ’70s”USC Digital Folklore Archives, 200820
“Supposedly first created in a top-secret, secure US government cannabis research facility in the 1970s”; a researcher purportedly gave a cutting to Nevil SchoenmakersThe Cannigma, 202021

Decades differ (late 1960s or 1970s), as do the agency and the route to the Netherlands. This site repeats the legend only with these attributions.

How sativa is it?

Sativa-dominant in every source that gives a lean: Barney’s Farm lists 80% sativa / 20% indica on both seed entries, AllBud the same, Weedmaps “sativa-dominant hybrid”, and SeedFinder files the Barney’s and Mr Nice versions as mostly sativa and Soma’s as indica/sativa.1,3,4,9,11,16,22 Leafly files it simply as a hybrid, placed on the energizing side of its scale.2 SeedFinder’s growers document three phenotypes of the Barney’s line, from long and sativa-dominant to short and indica-dominant.22

Six breeders, one name

SeedFinder lists six breeders’ versions of G13 Haze: Barney’s Farm, California Connoisseur Genetics, GreenLabel Seeds, Mr Nice Seedbank, Seedsman and Soma Seeds.23 Barney’s Farm’s, sold as feminized and as regular seeds, is the version that won the Cup.1,16,24

The others are different crosses. Mr Nice’s, credited to Nevil and Shantibaba, is G13 × Haze IBL, “a hybrid that has had to be inbred since the G13 was only available as a female clone”, sold as regular seeds.11,25 Soma Seeds’ is G13 × Neville’s Super Haze and was never offered feminized; SeedFinder lists 36 crosses made from it.9 Two packets of “G13 Haze” can therefore carry different Haze parents.

What our lab data adds

Our strict name matching found only 14 flower tests of plain G13 Haze and excluded 2 results sold under near-miss names, "G13 Haze NYC Diesel" and "NYC × G13 Haze", 1 of them flower.26 The parent is counted separately: 97 flower tests of G13, with a median total THC of 24.17% against 20.30% for G13 Haze (only 14 tests, a small sample).26 Among the 117 near-miss results excluded from G13’s own count were 18 labeled "G13 × Hawaiian Sativa Trim", the cross Barney’s Farm names for G13 Haze, sold as trim under the parents’ names.1,26

Strains bred from G13 Haze

StrainCrossSource
XJ-13Jack Herer × G13 Haze per Leafly; High Times says G-13 × a Jack Herer maleLeafly; High Times7,15
Connie ChungLA Flavor × G13 Haze (DNA Genetics) per Leafly; L.A. Confidential × G13 Haze per SeedFinderLeafly; SeedFinder8,9
G13 Haze Buddha’s SisterG13 Haze × Buddha’s Sister (Soma Seeds)SeedFinder9
G13 Haze CitralahG13 Haze × Citralah (Soma Seeds)SeedFinder9
G13 Haze Free TibetG13 Haze × Free Tibet (Soma Seeds)SeedFinder9
Devil’s HazeG13 Indica × G13 Haze (The Devil’s Harvest Seed Company)SeedFinder9
Conspiracy TheoryThailand × G13 Haze (Riot Seeds)SeedFinder9

Barney’s Farm’s Tangerine Dream (G13 × Neville’s A5 Haze, crossed again with G13) and Liberty Haze (a G13 male × Chem Dawg 91) are crosses of the parent G13, not of G13 Haze, although SeedFinder’s genealogy marks Liberty Haze as “probably” a G13 Haze cross.27,28

Sources

  1. Barney’s Farm, G13 Haze: feminized seed specifications. Accessed Oct 3, 2026.
  2. Leafly, G13 Haze strain information. Accessed Oct 3, 2026.
  3. Weedmaps, G13 Haze (aka G-13 Haze) strain page. Accessed Oct 3, 2026.
  4. AllBud, G13 Haze marijuana strain information and reviews. Accessed Oct 3, 2026.
  5. Leafly, G13 (G-13) strain information. Accessed Oct 3, 2026.
  6. Weedmaps, G-13 (aka Government Indica Strain 13) strain page. Accessed Oct 3, 2026.
  7. Leafly, XJ-13 strain information. Accessed Oct 3, 2026.
  8. Leafly, Connie Chung strain information. Accessed Oct 3, 2026.
  9. SeedFinder, G13 Haze (Soma Seeds): strain info, breeder description and hybrids. Accessed Oct 3, 2026.
  10. Sensi Seeds, Mr Nice G13 x Hash Plant regular seeds. Accessed Oct 3, 2026.
  11. SeedFinder, G13 Haze (Mr Nice Seedbank): strain info and breeder description. Accessed Oct 3, 2026.
  12. SeedFinder, G-13 (Unknown or Legendary): strain info, with Neville’s 1987 catalog text. Accessed Oct 3, 2026.
  13. Weedmaps, Hawaiian strain page. Accessed Oct 3, 2026.
  14. Leafly, Haze strain information. Accessed Oct 3, 2026.
  15. High Times, 25 greatest strains of all time (Nico Escondido) (2014-10-09). Accessed Oct 3, 2026.
  16. Barney’s Farm, G13 Haze: regular seed specifications. Accessed Oct 3, 2026.
  17. AllBud, BF G13 Haze (Barney’s Farm) marijuana strain information and reviews. Accessed Oct 3, 2026.
  18. Leafly, Tips for growing G13 cannabis (presented by Advanced Nutrients) (2017-06-30). Accessed Oct 3, 2026.
  19. Erowid, Ask Erowid: does the cannabis (“G13”) in American Beauty really exist? (2001-10-16). Accessed Oct 3, 2026.
  20. USC Digital Folklore Archives, The legend of G13 (urban legend, collected April 16, 2008) (2008-04-16). Accessed Oct 3, 2026.
  21. The Cannigma, G-13 marijuana strain review (Ben Hartman) (2020-06-17). Accessed Oct 3, 2026.
  22. SeedFinder, G13 Haze (Barneys Farm): strain info, breeder description, awards and grower reviews. Accessed Oct 3, 2026.
  23. SeedFinder, All G13 Haze strains. Accessed Oct 3, 2026.
  24. Wikipedia, Cannabis Cup (winners by year). Accessed Oct 3, 2026.
  25. Zamnesia, G13 Haze (Mr. Nice) regular seeds. Accessed Oct 3, 2026.
  26. Cannlytics (CC BY 4.0), cannabis_results: public state lab results (filtered and aggregated by Official Cannabis). Accessed Oct 3, 2026.
  27. SeedFinder, Tangerine Dream (Barneys Farm): strain info and awards. Accessed Oct 3, 2026.
  28. SeedFinder, Liberty Haze (Barneys Farm): strain info and awards. Accessed Oct 3, 2026.