- G13 is a hybrid Indica strain originating from USA (Mississippi), dating back to 1985.
- Lab tests place its THC content at approximately 20-25%.
- Its lineage runs through Mystery government indica — possibly Afghani or Northern Lights (unknown exact lineage), making it a key reference point for breeders.
- 4 documented strains descend from G13, including modern market favourites.
- Dominant terpenes: Myrcene, Limonene, Caryophyllene — driving its signature aroma and effects.
About G13
G13 is surrounded by more mythology than almost any other cannabis strain. The story: a clone of an exceptional plant from the US government's cannabis research program at the University of Mississippi was smuggled out by an employee in the 1980s. This clone — labeled 'Government Indica #13' — found its way into the hands of breeders and became the foundation of several legendary hybrids. Whether or not the full story is true, the strain that emerged under the G13 name was undeniably potent — a heavy, sedative indica with exceptional resin production and a distinct sweet-pine-ammonia aroma. G13 was preserved by the seed collector known as 'Chemdog' (of Chemdawg fame), who obtained the cut in the mid-1990s and crossed it into several important hybrids.
Flavor Profile
The Story & Lineage Origin
The G13 story begins with the US government's cannabis research program at the University of Mississippi, which has grown cannabis for research purposes since the 1960s. According to legend, a janitor or employee smuggled out a clone of the #13 plant (the best in their greenhouse) in the 1980s.
The clone made its way to the West Coast through a series of underground connections. Chemdog (of Chemdawg fame) received the G13 cut in the mid-90s and bred it into several notable lines.
G13 was used by Sensi Seeds and other Dutch breeders to create G13 Haze (one of the most famous Cannabis Cup winners of the 1990s). The true story remains unverifiable, which only adds to G13's mystique — but the genetics themselves are undeniable.
This strain is a staple of Amsterdam coffee shop menus. Check current availability and prices on DAM Live →
Find it on DAM Live: Browse G13 across Amsterdam Coffee Shop Menus, Amsterdam Cannabis Guides, or see its live Amsterdam price index →
Live Amsterdam Pricing
See real-time prices, availability, and shop locations for G13 at Amsterdam coffeeshops — updated daily.
View Live Menus →Where to Find G13 in Amsterdam
G13 is a popular strain on Amsterdam's coffeeshop menus. Prices and availability change daily based on supply, quality, and seasonal harvests.
- Centrum / De Wallen — Most tourist-facing shops stock popular strains like G13
- Bedford Factory (Outer Space) — Premium selection with quality-tested G13
- Barney's Gourmet Flowers — High-end G13 with detailed lab reports
- Grey Area — Curated G13 selection, limited stock
- LOF Amsterdam — Wide G13 variety with delivery options
For live pricing, menu availability, and shop locations — visit DAM Live →
Genetic Background
Unknown. Believed to be a highly selected Afghani or Northern Lights phenotype from the US government cannabis supply
Phenotypes & Cultivars
G13 is available in the following phenotypes and cultivars:
Terpene Profile
G13 is dominated by Myrcene, Limonene, Caryophyllene. These compounds shape the strain's aroma, flavor, and reported effects.
Known Offspring
Strains that descend from G13:
Frequently Asked Questions
What is the THC percentage of G13?
G13 typically tests at 20-25% THC content in lab results, though actual potency varies by phenotype, growing conditions, and harvest. As an indica-leaning strain, the THC produces a heavier body-driven effect.
Is G13 a sativa or indica?
G13 is an indica cannabis strain (Indica). Bred from Mystery government indica — possibly Afghani or Northern Lights (unknown exact lineage), its effects lean toward a relaxing, body-driven indica experience. Users report: Extremely heavy body stone, powerful sedation, couch-lock, sleep-inducing, euphoric onset.
G13 strain review — what to expect
G13 is known for Extremely heavy body stone, powerful sedation, couch-lock, sleep-inducing, euphoric onset. The most mysterious strain in cannabis history. G13 is rumored to have been developed at a US government research facility at the University of Mississippi. The clone was supposedly smuggled out in the 1980s and became one of the most sought-after and influential indica strains ever. The aroma profile features sweet pine, ammonia, earth, pepper, spice. Dominant terpenes: Myrcene, Limonene, Caryophyllene.
What are the phenotypes of G13?
G13 expresses several phenotypes and cuts, including G13, G13 #1. The dominant phenotypes often show subtle differences in structure, flowering time, color expression, and terpene balance while sharing the same core genetics.
What is G13 crossed from?
G13 was bred from Mystery government indica — possibly Afghani or Northern Lights (unknown exact lineage). Detailed ancestry: Unknown. Believed to be a highly selected Afghani or Northern Lights phenotype from the US government cannabis supply. This cross produces the strain's characteristic effects, terpene profile, and growth pattern.
Is G13 available in Amsterdam coffee shops?
Yes — G13 is found on Amsterdam coffeeshop menus. Live Amsterdam pricing and shop availability is updated daily on DAM Live.
What terpenes are in G13?
G13 is dominated by Myrcene, Limonene, Caryophyllene. These aromatic compounds shape the strain's signature flavor, aroma, and contribute to its reported effects through the entourage effect.
How much does G13 yield and how long does it flower?
G13 has a flowering time of 8-10 weeks and produces moderate to high yields. Plants reach medium height, making it a versatile size for most indoor setups.
What is G13 and where does it come from?
G13 is an indica cannabis strain that originates from USA (Mississippi). It belongs to the 1980s era of cannabis genetics. The most mysterious strain in cannabis history. G13 is rumored to have been developed at a US government research facility at the University of Mississippi. The clone was supposedly smuggled out in the 1980s and became one of the most sought-after and influential indica strains ever.
What is the genetic background of G13?
G13 has the following ancestry: Unknown. Believed to be a highly selected Afghani or Northern Lights phenotype from the US government cannabis supply.
Is G13 indica or sativa?
G13 is an indica cannabis strain. Learn how in indica vs sativa classification differs in our strain guide.
What does G13 smell and taste like?
G13 has a Sweet pine, ammonia, earth, pepper, spice aroma, with flavors described as Pine, earth, sweet, chemical spice. Its dominant terpenes are Myrcene, Limonene, Caryophyllene.
Medical Applications
G13 is commonly associated with: