G13
aka G-13, G Thirteen, Government Indica Strain 13 +4 more
G13 is a legendary indica-dominant hybrid (70/30) with mysterious government research origins dating to the 1960s-70s. Bred by Nevil Schoenmakers from Afghani genetics, it delivers powerful euphoria followed by deep physical relaxation. With 16-24% THC and limonene-dominant terpenes, it offers earthy, pine, and citrus flavors with sweet berry notes. The strain excels for evening use, providing stress relief, pain management, and sleep support. Its dense, trichome-frosted buds and potent effects make G13 a cannabis icon cherished by experienced consumers seeking profound relaxation and therapeutic benefits.
The Short Answer
What kind of high is G13?
Limonene-led and sweet-pine on the palate, most often reported relaxed and picked for sleep & bedtime at night.
Terpenes decide how a strain feels — THC% only decides how strong the dose is. Here is the family, the chemistry behind it, and what people reach for it to do.
Terpenes are the aromatic compounds that shape the character of a high. The blend a strain carries — not its THC percentage — is what makes one feel bright and social and another heavy and sleepy, which is why the top three are listed rather than just the leader.
Terpene percentages belong to the jar, not the strain. They move with harvest timing, drying, cure and shelf age — the lighter ones literally evaporate. What holds steady is which terpenes lead, so that is what we rank.
See the full profile →Learn how terpenes work →- Anxiety reduction
- Mood elevation
- Stress relief
- Linalool Floral, lavender, sweet
- Caryophyllene Spicy, peppery, woody
Ordered by measured share — the exact percentages shift with every batch and cure.
The effects reported most often across our research sources. Every body is different — set, setting and tolerance all move the result.
- Euphoric
- Happy
The activities this strain gets picked for most often, leading with the specific ones rather than the broad buckets nearly every strain shares. A starting point, not a prescription — what works for you is personal.
See the full list →The flavor notes reported most often across our research sources, led by the most specific one — flavor tracks the terpene blend, but cure, age and how you consume it all shift what actually lands on the palate.
See the full profile →- Earthy
The aroma notes reported most often across our research sources — what the jar gives up before you light it. This is the strain's own recorded profile, not the textbook aroma of its lead terpene.
See the full profile →- Berry
- Best Time night
- Era 1977
- Rarity Uncommon
Genetics Indica A lineage label, not an effects predictor — most modern flower is a hybrid, and the terpene mix above is what you will actually notice.
Potency Check the label, not the strain Varies by batch, grower and harvest — check the label on the product you are buying. Scan your label → Reported ranges →
Heads up Most reported: dry mouth and dry eyes. Responses vary — start low, go slow. Review safety →
Your guided read
6 chapters on G13
Start at the top and work down — each chapter builds on the one before it. Jump to any chapter to read it on its own.
- The Experience How this strain is reported to feel, and when people reach for it.
- Look, Aroma & Taste The smell and flavour you will actually notice — and the terpenes behind them.
- Chemistry & Research Therapeutic reports, published research, and what the lab numbers do — and do not — tell you.
- Using It Well Consumption methods that suit this strain, and the side effects to plan around.
- Where It Comes From The genetics, the breeders, and the recognition it has picked up along the way.
- The Full Story The long-form profile and community video reviews, once you want the detail.
Strain Highlights
Key insights at a glance
The Experience
Professor High Says...
In-depth strain breakdown from Professor High, our AI cannabis expert
Experiencing G13 is like slowly sinking into the world's most comfortable chair while your mind floats on a gentle euphoric cloud. The initial wave hits with this crystalline clarity—thoughts become vivid and colorful, creativity sparks like tiny fireworks, and suddenly every muscle you didn't realize was tense begins to unclench methodically from head to toe. It's fascinating how the limonene creates this bright, uplifting headspace even as your body melts into pure relaxation. The Afghani genetics show their power about twenty minutes in—you feel this deep gravitational pull that's not sedating so much as profoundly peaceful. Pain signals seem to fade into background noise, stress dissolves like sugar in warm tea, and time... well, time becomes wonderfully irrelevant. What strikes me most is the quality of the body relaxation—it's not numbing or disorienting, but rather like every cell is exhaling simultaneously. The appetite stimulation is undeniable, and sleep arrives naturally once you surrender to it. This is indica mastery demonstrating how terpene synergy and genetics create experiences that transcend simple intoxication into genuine therapeutic relief.
Effects Profile
Relaxed · Euphoric · Happy
Best enjoyed during night
Deep relaxation and sleep
Best For
Sleep & Bedtime · Relaxing · Stress Relief
Effect Sources
- 1 G13 Cannabis Strain Information - GrowDiaries growdiaries.com(opens in new tab)
- 2 G13 Weed Strain Guide: Terpenes and Effects of G-13 Strain hometownhero.com(opens in new tab)
- 3 G-13 Marijuana Strain Review 2026 | The Cannigma cannigma.com(opens in new tab)
- 4 G13 Strain - Indica Cannabis Review, 24.38% THC,5.3mg/g Limonene hytiva.com(opens in new tab)
- 5 G13 Strain: Legendary Indica-Dominant Hybrid Overview inheal.com(opens in new tab)
- 6 How to Grow G13 Strain: Cultivating Strain G13 blimburnseeds.com(opens in new tab)
- 7 G13 Cannabis Strain Information & Review ilovegrowingmarijuana.com(opens in new tab)
- 8 G13 - Strain Information - CannaConnection cannaconnection.com(opens in new tab)
- 9 G13 Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 10 G13 | Weed Strain cannabislinkinc.com(opens in new tab)
- 11 G13 Strain Autoflowering Feminized Marijuana Seeds vancouverseedbank.ca(opens in new tab)
- 12 G13 cannabis.net(opens in new tab)
- 13 G13 Strain – A power punch of taste and aroma collective-cannabis.com(opens in new tab)
- 14 G13 aka G-13, G Thirteen Weed Strain Information leafly.com(opens in new tab)
- 15 nuggmd.com nuggmd.com(opens in new tab)
- 16 G13 - HelloMD hellomd.com(opens in new tab)
16 verified sources
Look, Aroma & Taste
Aroma & Flavor
Earthy · Pine · Berry
Aroma & Flavor Sources
- 1 G13 Cannabis Strain Information - GrowDiaries growdiaries.com(opens in new tab)
- 2 G13 Weed Strain Guide: Terpenes and Effects of G-13 Strain hometownhero.com(opens in new tab)
- 3 G-13 Marijuana Strain Review 2026 | The Cannigma cannigma.com(opens in new tab)
- 4 G13 Strain - Indica Cannabis Review, 24.38% THC,5.3mg/g Limonene hytiva.com(opens in new tab)
- 5 G13 Strain: Legendary Indica-Dominant Hybrid Overview inheal.com(opens in new tab)
- 6 How to Grow G13 Strain: Cultivating Strain G13 blimburnseeds.com(opens in new tab)
- 7 G13 Cannabis Strain Information & Review ilovegrowingmarijuana.com(opens in new tab)
- 8 G13 - Strain Information - CannaConnection cannaconnection.com(opens in new tab)
- 9 G13 Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 10 G13 | Weed Strain cannabislinkinc.com(opens in new tab)
- 11 G13 Strain Autoflowering Feminized Marijuana Seeds vancouverseedbank.ca(opens in new tab)
- 12 G13 Strain – A power punch of taste and aroma collective-cannabis.com(opens in new tab)
- 13 G13 aka G-13, G Thirteen Weed Strain Information leafly.com(opens in new tab)
- 14 nuggmd.com nuggmd.com(opens in new tab)
- 15 G13 - HelloMD hellomd.com(opens in new tab)
15 verified sources
Aromas
Flavors
Terpene Profile
Limonene leads · 9 terpenes mapped
Terpene Sources
- 1 G13 Cannabis Strain Information - GrowDiaries growdiaries.com(opens in new tab)
- 2 G13 Weed Strain Guide: Terpenes and Effects of G-13 Strain hometownhero.com(opens in new tab)
- 3 G-13 Marijuana Strain Review 2026 | The Cannigma cannigma.com(opens in new tab)
- 4 G13 Strain - Indica Cannabis Review, 24.38% THC,5.3mg/g Limonene hytiva.com(opens in new tab)
- 5 G13 Cannabis Strain Information & Review ilovegrowingmarijuana.com(opens in new tab)
- 6 G13 Strain Autoflowering Feminized Marijuana Seeds vancouverseedbank.ca(opens in new tab)
- 7 G13 Strain – A power punch of taste and aroma collective-cannabis.com(opens in new tab)
- 8 G13 aka G-13, G Thirteen Weed Strain Information leafly.com(opens in new tab)
- 9 G13 - HelloMD hellomd.com(opens in new tab)
9 verified sources
Terpene Distribution
Terpene profile: Limonene 0.5%, Linalool 0.5%, Caryophyllene 0.4%, Humulene 0.3%, Pinene 0.3%, Ocimene 0.3%, Myrcene 0.3%, Carene 0.2%, Phellandrene 0.2% .
Limonene Dominant
Flavor: Citrus, lemon, orange
Linalool
Flavor: Floral, lavender, sweet
Caryophyllene
Flavor: Spicy, peppery, woody
Humulene
Flavor: Hoppy, woody, earthy
Pinene
Flavor: Pine, fresh forest
Ocimene
Flavor: Sweet, herbaceous, woody
Myrcene
Flavor: Earthy, musky, fruity
Carene
Phellandrene
Full Profile
Limonene
0.53%
Flavor Profile:
Citrus, lemon, orange
Effects:
Linalool
0.48%
Flavor Profile:
Floral, lavender, sweet
Effects:
Caryophyllene
0.43%
Flavor Profile:
Spicy, peppery, woody
Effects:
Humulene
0.33%
Flavor Profile:
Hoppy, woody, earthy
Effects:
Pinene
0.28%
Flavor Profile:
Pine, fresh forest
Effects:
Ocimene
0.26%
Flavor Profile:
Sweet, herbaceous, woody
Effects:
Myrcene
0.25%
Flavor Profile:
Earthy, musky, fruity
Effects:
Carene
0.23%
Phellandrene
0.16%
Appearance
Deep forest green · Purple undertones
Color Palette
Texture
Dense, chunky indica structure with tightly packed calyxes. Buds feel slightly sticky with heavy resin coverage. Breaks apart easily when properly cured, releasing pungent aromas.
Crystal Density
very high
Exceptional crystal coverage
Chemistry & Research
Medical Effects
9 reported therapeutic uses on file
Medical Effect Sources
- 1 G13 Cannabis Strain Information - GrowDiaries growdiaries.com(opens in new tab)
- 2 G-13 Marijuana Strain Review 2026 | The Cannigma cannigma.com(opens in new tab)
- 3 G13 Strain - Indica Cannabis Review, 24.38% THC,5.3mg/g Limonene hytiva.com(opens in new tab)
- 4 How to Grow G13 Strain: Cultivating Strain G13 blimburnseeds.com(opens in new tab)
- 5 G13 Cannabis Strain Information & Review ilovegrowingmarijuana.com(opens in new tab)
- 6 G13 Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 7 G13 | Weed Strain cannabislinkinc.com(opens in new tab)
- 8 G13 cannabis.net(opens in new tab)
- 9 G13 Strain – A power punch of taste and aroma collective-cannabis.com(opens in new tab)
- 10 G13 aka G-13, G Thirteen Weed Strain Information leafly.com(opens in new tab)
- 11 nuggmd.com nuggmd.com(opens in new tab)
- 12 G13 - HelloMD hellomd.com(opens in new tab)
12 verified sources
Mental Effects
- •Anxiety Relief
Reduces anxiety and promotes calm without heavy sedation
- •Stress Relief
Alleviates stress and tension throughout the body
- •Depression Management
Elevates mood and provides emotional uplift
- •PTSD Support
Helps manage post-traumatic stress symptoms
Professor High visualization
Body Effects
- •Pain Relief
Reduces chronic pain, arthritis, and migraines effectively
- •Insomnia Treatment
Promotes sleep and sedation for restful nights
- •Muscle Spasm Relief
Reduces muscle tension and spasm occurrence
- •Appetite Stimulation
Increases hunger and promotes gastrointestinal wellness
- •Nausea Relief
Alleviates nausea and gastrointestinal discomfort
Medical Disclaimer: This information is AI-generated based on available research and user reports, provided for educational purposes only, and is not intended as medical advice. Cannabis affects everyone differently. Consult with a qualified healthcare professional before using cannabis for medical purposes. Do not use cannabis if pregnant, nursing, or have a medical condition without consulting your doctor.
What Research Says
Peer-reviewed studies, terpene science & safety guidance
What does the research say about G13?
G13 is a indica cannabis strain containing up to 24.0% THC, with a terpene profile dominated by Limonene and Linalool. This page currently has good data confidence. Below are profile sources when available plus authoritative resources for understanding the compounds in this strain.
Terpene Research
Cannabinoid Information
Cannabis Regulations & Safety
Educational resources only — not medical advice. Always consult a qualified clinician for health decisions.
Cannabinoids (THC & CBD)
THC 16-24% · Type I chemovar
THC% tells you how strong. Terpenes tell you how it feels.
THC percentage is a property of the product in your hand, not of the strain. It shifts with the batch, the grower, the harvest, and how the flower was cured and stored — the same strain can test several points apart from two different jars.
Treat the ranges below as market context for what to expect on a shelf — then read the actual label on the product you are buying, and use the terpene profile to judge how it will feel.
High THC (>15%), low CBD (<1%) - Most common recreational strains
Using It Well
Consumption Methods
Smoking · Vaping · Tinctures
Recommended Methods
Side Effects
Dry Mouth · Dry Eyes · +3 more
Side effects vary by individual. Start low, go slow. Consult a healthcare professional with concerns.
These are commonly reported effects. Individual experiences may vary based on dosage, tolerance, and consumption method.
Where It Comes From
Lineage & History
Afghani × Maui Haze · bred by Nevil Schoenmakers
Lineage Sources
- 1 G13 Cannabis Strain Information - GrowDiaries growdiaries.com(opens in new tab)
- 2 G-13 Marijuana Strain Review 2026 | The Cannigma cannigma.com(opens in new tab)
- 3 G13 Strain: Legendary Indica-Dominant Hybrid Overview inheal.com(opens in new tab)
- 4 G13 - Strain Information - CannaConnection cannaconnection.com(opens in new tab)
- 5 The Origins Of G13 Cannabis Strain seedsman.com(opens in new tab)
- 6 G13 Strain Autoflowering Feminized Marijuana Seeds vancouverseedbank.ca(opens in new tab)
- 7 G13 Strain – A power punch of taste and aroma collective-cannabis.com(opens in new tab)
- 8 G13 aka G-13, G Thirteen Weed Strain Information leafly.com(opens in new tab)
- 9 G13 - HelloMD hellomd.com(opens in new tab)
9 verified sources
G13 is an indica-dominant strain with Afghani genetics as its primary parent, often crossed with Haze varieties. The strain originated in the 1960s-1970s and is attributed to breeder Nevil Schoenmakers.
Genetics
Origin Timeline
First cultivated in 1977
Breeder
Nevil Schoenmakers
Seed Bank
Blimburn Seeds
The Full Story
Detailed Description
The long-form profile · ~4 min read
The Legendary G13: A Cannabis Icon Steeped in Mystery
G13 stands as one of the most mythologized strains in cannabis history, shrouded in Cold War-era conspiracy theories and government research legends. This indica-dominant hybrid (70% indica/30% sativa) has captivated enthusiasts since the 1960s-70s with its powerful effects and enigmatic origins. Whether the stories of clandestine government breeding programs hold truth or simply add to the mystique, G13 delivers an undeniably potent experience that has earned its place in the cannabis hall of fame.
🧬 Genetic Heritage & Lineage
The lineage of G13 reads like a cannabis spy novel. Most sources attribute the strain's foundation to pure Afghani genetics, bred by the legendary Nevil Schoenmakers who obtained it through mysterious circumstances in the 1970s. Some variations incorporate Maui Haze or Neville's A5 Haze into the genetic mix, creating slightly different phenotypes. The Afghani backbone provides the heavy indica foundation, while any sativa influence adds subtle cerebral uplift to what is fundamentally a body-dominant experience. The strain emerged from the 1960s-70s era of intensive cannabis breeding, allegedly as part of research conducted at the University of Mississippi—hence the "Government Indica Strain" nickname that fuels conspiracy theories to this day.
👃 Terpene Profile & Aromatics
G13's terpene profile creates a complex aromatic experience dominated by Limonene at 0.53%, which delivers bright citrus notes that cut through the earthiness. Linalool (0.48%) contributes floral, lavender-like qualities and calming properties, while Caryophyllene (0.43%) adds spicy, peppery undertones with anti-inflammatory potential. Humulene (0.33%) brings woody, hoppy notes, and Myrcene (0.25%) enhances the sedative qualities while adding herbal earthiness.
The aroma profile combines earthy, pine, and sweet base notes with surprising complexity. You'll notice citrus brightness on first encounter, followed by berry and spicy secondary notes. Some phenotypes express woody, herbal, and skunky characteristics, with pungent overtones that announce the strain's potency. The overall scent is rich, layered, and unmistakably indica-forward.
👅 Flavor Experience
The flavor journey mirrors the aromatic complexity. On initial inhale, you'll taste sweet earthiness with prominent pine notes that feel grounding and natural. The mid-palate reveals citrus brightness and subtle berry sweetness, while spicy, peppery undertones from caryophyllene create tingling sensations. The exhale leaves woody, herbal notes that linger pleasantly, with some floral qualities emerging. The flavor profile is smooth yet robust, with the earthiness providing a satisfying base that showcases the strain's Afghani heritage.
🎯 Effects & Experience
G13 delivers a powerful indica experience with THC levels ranging from 16-24% (occasionally testing higher). The onset begins within 5-10 minutes, starting with cerebral euphoria and mood elevation that quickly transitions into deep physical relaxation. Users report feeling happy, uplifted, and creative initially, before the body effects dominate.
The peak arrives at 30-45 minutes, bringing profound relaxation that spreads throughout the body. Muscles release tension, stress dissolves, and a sense of peaceful calm settles in. Many users experience increased appetite and sleepiness as effects intensify. The mental state remains euphoric without heavy cognitive impairment, though focus may wander.
Duration typically extends 2-3 hours, with lingering relaxation lasting even longer. The comedown is gentle, often leading naturally into restful sleep. Intensity is strong—this is not a beginner-friendly strain at higher doses.
🎮 Use Cases & Activities
G13 excels for evening and nighttime use. It's ideal for stress relief after demanding days, pain management when physical discomfort interferes with rest, and sleep support for those struggling with insomnia. The strain also works well for social activities in intimate settings where deep relaxation enhances conversation and connection. Creative individuals may appreciate the initial euphoric phase for artistic projects, though productivity wanes as body effects intensify. It's perfect for meditation, gentle yoga, or simply unwinding with entertainment.
💚 Medical & Therapeutic Potential
G13 offers significant therapeutic potential across multiple conditions. The strain may help with anxiety relief through its calming terpene profile, particularly linalool's anxiolytic properties. Stress management benefits from the euphoric onset and deep relaxation. Chronic pain, arthritis, and migraines may respond to the anti-inflammatory caryophyllene and overall analgesic effects. Muscle spasms and tension release under the strain's powerful body relaxation. Insomnia sufferers often find G13 highly effective for promoting sleep. Depression and PTSD symptoms may be eased by the mood-elevating properties, though individual responses vary. Appetite stimulation and nausea relief round out the medicinal applications.
👁️ Visual Characteristics
G13 buds display classic indica structure—dense, chunky, and compact with tightly packed calyxes. The primary colors feature deep forest green with purple undertones that emerge in cooler growing conditions. Secondary colors include bright orange pistils that contrast beautifully against the green backdrop, while amber and golden trichomes coat the surface heavily, creating a frosted appearance. The crystal density rates as very high, with resinous trichomes covering every visible surface. Properly cured G13 feels slightly sticky but breaks apart easily, releasing pungent aromas when handled.
📜 Cultural Context & Recognition
G13's legend status in cannabis culture stems partly from its mysterious origins and partly from genuine quality. The strain has inspired countless stories, songs, and even movies. While it hasn't won major Cannabis Cup awards in recent years, its historical significance and enduring popularity speak volumes. It remains a favorite among indica enthusiasts who appreciate its reliable effects and distinctive character. Availability has improved with modern cultivation, though true G13 genetics can still be difficult to verify.
⚠️ Consumer Considerations
Experience level: G13 suits intermediate to advanced consumers. The potency can overwhelm cannabis newcomers, potentially causing anxiety or excessive sedation. Start with small doses (one or two puffs) and wait 15-20 minutes before consuming more. Common side effects include dry mouth, dry eyes, and occasional dizziness. Staying hydrated and having eye drops available helps. Some users report mild paranoia at very high doses. The strain works best consumed 2-3 hours before desired sleep time, allowing the euphoric phase to pass before deep relaxation sets in. Avoid G13 when you need to remain alert, productive, or operate vehicles.
Research Methodology
How we compiled this strain profile
This strain profile was compiled from 20 published sources covering 'G13'. Our research pipeline cross-references these sources and reports how strongly they agree — see the confidence breakdown below.
Data Quality by Section
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Strain Highlights
Key insights at a glance
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