G13
16%
THC
Top flavors
G13 effects are mostly calming.
G13 potency is average.
G13 is a classic indica strain derived from Afghani lineage. It is widely credited to be a result of selective breeding that emphasized vigorous growth patterns and consistent development. Suited for indoor environments, the strain is recognized for its relative ease of cultivation.
The terpene profile is dominated by myrcene, followed by pinene, ocimene, limonene, caryophyllene, beta-pinene, linalool, humulene, guaiol, bisabolol, nerolidol, and camphene. This broad composition influences the specific sensory experience of the cultivar, combining earthy and herbal foundations provided by myrcene and pinene with complex, nuanced volatile compounds that provide a multifaceted aromatic profile.
As a THC-dominant variety, G13 is primarily sought for its capacity to induce relaxed, sleepy, and happy effects. These properties make it a frequent choice for the management of sleep, pain, and stress. The genetic legacy of the strain includes hybrids such as G13 x Amnesia Haze, Brainstorm X G13, G13 x Blueberry Headband, G13 x Hawaiian sunset, G13 x Haze, G13 x Widow, and MarlysCollie x G13.
Terpene Profile
Synergies (+) and conflicts (−) are relative to each other within this profile.
| Terpene | Share | Character | Likely role |
|---|---|---|---|
| myrcene | ~60% | earthy | relaxing · solo |
| pinene | ~28% | pine | focus · creative |
| ocimene | ~12% | sweet | energetic · social |
Research notes below describe isolated terpene mechanisms and early findings. They do not guarantee effects from this strain and are not medical advice.
Russo 2011: naloxone-sensitive analgesia, potentiates barbiturate sleep; dominant sedating terpenoid; blocks hepatic carcinogenesis by aflatoxin.
Russo 2011: acetylcholinesterase inhibitor (IC50 0.44 mM) counteracting THC-induced short-term memory deficits; most widely encountered terpenoid in nature; anti-inflammatory via PGE-1.
Antifungal, antiviral, decongestant; activates CB1/CB2 at 10–60% THC efficacy per Israeli receptor study (NORML 2025); highly volatile (bp 50–66°C); limited clinical data.
Effects
Reported effects — derived from terpene chemistry and cannabinoid profile.
relaxed
eveningPrimary endpoint of myrcene+linalool sedating combinations; GABA modulation is the dominant mechanistic driver.
sleepy
eveningMyrcene potentiates barbiturate sleep (Russo 2011); CBN 2024 RCT reduces nighttime awakenings at 20 mg; nerolidol+myrcene+linalool GABAergic compounded effect.
happy
anytimeGenetic Profile
Pure Indica
Body-heavy, relaxing genetics. Short stature, dense buds, broad leaves.
THC-Dominant
High THC, trace CBD. Psychoactive. Full CB1 agonism — euphoria, appetite, analgesia.
Legendary pure Afghani indica clone with disputed origins; reportedly selected from government research, known for exceptional potency and resin.
Genealogy
Parentage, ancestry, and genetic relatives of G13.
Siblings
Share parent afghani
Offspring — 1 strains bred from G13
Composite Traits
Where to buy G13
No verified dispensaries on file — find it on Leafly.
Dispensary Locator
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Community Reviews
Okay, so I finally tried G13 after hearing all the hype, and... it was good? Don't get me wrong, I got high, felt pretty relaxed and definitely sleepy after an hour or so. But I wasn't blown away like some people claim. It felt a lot like other strong indicas I've had. The body buzz was there, a nice calming feeling, but not that super deep, almost medicinal high I was expecting. Maybe my tolerance is just too high, or maybe the specific batch I got wasn't the best expression of the strain. It tasted fine, a bit spicy and woody. Good for winding down, but I wouldn't call it life-changing. Solid but unremarkable.
Dude, G13 is no joke. I picked some up last weekend and it absolutely floored me. Like, I was planning to clean my apartment and next thing I know, I'm stuck to the couch watching documentaries about space. The body high is insane, just pure relaxation, melts all the stress away. And the sleep? Oh my god, the sleep was glorious. If you're looking to just completely chill out and forget about your troubles, this is the one. Definitely a night-time strain, wouldn't recommend before doing anything important. Flavor was kinda earthy and piney, nothing super fancy but really smooth. 10/10 would nap again.
What would G13 × ? produce?
Predict the terpene profile, effects, and growing traits of a cross. Our gene weaver engine votes on dominant traits from both parents.
Build a cross with G13 →Similar strains
Same primary terpene with overlapping effects.
Frequently Asked Questions
Is G13 indica or sativa?
G13 is modeled here as a pure indica (body-heavy, relaxing genetics).
What terpene is dominant in G13?
Myrcene is shown as the dominant terpene at approximately ~60%. Pinene follows as the secondary terpene.
Is G13 good for daytime use?
G13 is versatile and works across different times of day depending on dose and individual response.
How accurate is this data?
See the "Data confidence" card in the sidebar. Terpene profiles and effects are chemistry-informed estimates — individual responses depend on phenotype, source, and personal chemistry.