OG #18
aka OG 18, Private Reserve, Private Reserve OG +3 more
OG #18, also known as Private Reserve, is an award-winning indica-dominant hybrid (70/30) from DNA Genetics that delivers powerful relaxation with surprising mental clarity. With THC levels reaching 16-26%, this strain combines euphoric cerebral effects with deep body sedation, wrapped in pungent diesel, pine, and sour citrus aromas. Multiple Cannabis Cup victories highlight its exceptional quality, while its limonene-rich terpene profile provides mood elevation alongside the indica's soothing embrace, making it ideal for evening stress relief and sleep support.
The Short Answer
What kind of high is OG #18?
Limonene-led and sweet-diesel on the palate, most often reported relaxed and picked for sleep & bedtime in the evening.
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
- Caryophyllene Spicy, peppery, woody
- Myrcene Earthy, musky, fruity
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 →- Pine
- 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 →- Earthy
- Sour
- Best Time evening
- Era 2007
- Rarity Common
Genetics Indica-Dominant Hybrid 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 OG #18
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
Settling into the couch after exhaling that diesel-pine cloud... okay, so the first thing hitting me is this unexpected wave of mental brightness—my thoughts feel crisp and elevated, almost effervescent, which is fascinating for such an indica-heavy strain. The limonene is definitely doing its work here, creating this luminous headspace that feels simultaneously focused and euphoric. But here's where it gets interesting: about fifteen minutes in, this warm, tingling sensation starts cascading down from my shoulders, spreading like honey through my muscles. It's not just relaxation—it's this profound unwinding at the cellular level, like every fiber is releasing tension I didn't know I was holding. The duality is remarkable: my mind stays alert enough to appreciate what's happening, tracking the sensory experience with scientific curiosity, even as my body melts deeper into complete physical tranquility. The sour citrus notes seem to mirror the mental effects—sharp and attention-grabbing—while the earthy kush undertones match the body sedation perfectly. There's this tingly, almost electric quality dancing across my skin that keeps the experience from becoming too heavy or couch-lock dominant. By the thirty-minute mark, though, the indica genetics assert themselves more fully, and I find myself contentedly immobilized, thoughts slowing to a peaceful drift. The euphoria persists but transforms into something deeper—a quiet contentment rather than active happiness. This is the kind of high that makes you understand why OG genetics earned their legendary status: complex, layered, evolving, and ultimately... profoundly satisfying.
Effects Profile
Relaxed · Euphoric · Happy
Best enjoyed during evening
Wind down and relax
Best For
Sleep & Bedtime · Stress Relief · Relaxing
Effect Sources
- 1 OG #18 - Compare The Strain comparethestrain.ca(opens in new tab)
- 2 The OG 18 (DNA Genetics) feminized zamnesia.com(opens in new tab)
- 3 OG #18 Seeds pacificseedbank.com(opens in new tab)
- 4 OG #18 Strain Review: A Comprehensive Growing Guide and Experience - GetBudsLegalize.com getbudslegalize.com(opens in new tab)
- 5 OG #18 Strain - Hybrid with Sedative Effects wayofleaf.com(opens in new tab)
- 6 The OG #18 - Ganjed ganjed.com(opens in new tab)
- 7 OG #18 Strain - Growing Tips and Medical Effects marijuana-guides.com(opens in new tab)
- 8 OG #18 - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 9 OG #18 Strain ilovegrowingmarijuana.com(opens in new tab)
- 10 OG #18 - Weed Strains leafly.com(opens in new tab)
- 11 OG #18 Strains supherbscanada.store(opens in new tab)
- 12 OG 18 thestrainseeds.com(opens in new tab)
- 13 The OG #18 Private Reserve OG askgrowers.com(opens in new tab)
- 14 The OG #18 Seeds by Reserva Privada growdiaries.com(opens in new tab)
14 verified sources
Look, Aroma & Taste
Aroma & Flavor
Diesel · Earthy · Pungent
Aroma & Flavor Sources
- 1 OG #18 - Compare The Strain comparethestrain.ca(opens in new tab)
- 2 The OG 18 (DNA Genetics) feminized zamnesia.com(opens in new tab)
- 3 OG #18 Seeds pacificseedbank.com(opens in new tab)
- 4 OG #18 Strain Review: A Comprehensive Growing Guide and Experience - GetBudsLegalize.com getbudslegalize.com(opens in new tab)
- 5 OG #18 Strain - Hybrid with Sedative Effects wayofleaf.com(opens in new tab)
- 6 The OG #18 - Ganjed ganjed.com(opens in new tab)
- 7 OG #18 Strain - Growing Tips and Medical Effects marijuana-guides.com(opens in new tab)
- 8 OG #18 - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 9 OG #18 Strain ilovegrowingmarijuana.com(opens in new tab)
- 10 OG #18 - Weed Strains leafly.com(opens in new tab)
- 11 OG #18 Strains supherbscanada.store(opens in new tab)
- 12 OG 18 thestrainseeds.com(opens in new tab)
- 13 The OG #18 Private Reserve OG askgrowers.com(opens in new tab)
- 14 The OG #18 Seeds by Reserva Privada growdiaries.com(opens in new tab)
14 verified sources
Aromas
Flavors
Terpene Profile
Limonene leads · 7 terpenes mapped
Terpene Sources
- 1 OG #18 Seeds pacificseedbank.com(opens in new tab)
- 2 OG #18 Strain - Hybrid with Sedative Effects wayofleaf.com(opens in new tab)
- 3 OG #18 Strain - Growing Tips and Medical Effects marijuana-guides.com(opens in new tab)
- 4 OG #18 - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 5 OG #18 Strain ilovegrowingmarijuana.com(opens in new tab)
- 6 OG #18 - Weed Strains leafly.com(opens in new tab)
- 7 OG #18 Strains supherbscanada.store(opens in new tab)
- 8 The OG #18 Seeds by Reserva Privada growdiaries.com(opens in new tab)
8 verified sources
Terpene Distribution
Terpene profile: Limonene 0.7%, Caryophyllene 0.6%, Myrcene 0.5%, Linalool 0.3%, Pinene 0.1%, Humulene 0.0%, Terpinolene 0.0% .
Limonene Dominant
Flavor: Citrus, lemon, orange
Caryophyllene
Flavor: Spicy, peppery, woody
Myrcene
Flavor: Earthy, musky, fruity
Linalool
Flavor: Floral, lavender, sweet
Pinene
Flavor: Pine, fresh forest
Humulene
Flavor: Hoppy, woody, earthy
Terpinolene
Flavor: Fresh, piney, floral, citrus
Full Profile
Limonene
0.69%
Flavor Profile:
Citrus, lemon, orange
Effects:
Caryophyllene
0.58%
Flavor Profile:
Spicy, peppery, woody
Effects:
Myrcene
0.49%
Flavor Profile:
Earthy, musky, fruity
Effects:
Linalool
0.25%
Flavor Profile:
Floral, lavender, sweet
Effects:
Pinene
0.13%
Flavor Profile:
Pine, fresh forest
Effects:
Humulene
0.03%
Flavor Profile:
Hoppy, woody, earthy
Effects:
Terpinolene
0.02%
Flavor Profile:
Fresh, piney, floral, citrus
Effects:
Appearance
Deep forest green · Purple undertones
Color Palette
Texture
Dense, compact indica-dominant bud structure with heavy resin production and tight node spacing. The flowers feel sticky and resinous to the touch, with a firm, chunky texture that breaks apart to reveal frosted interior layers thick with trichome coverage.
Crystal Density
very high
Exceptional crystal coverage
Chemistry & Research
Medical Effects
8 reported therapeutic uses on file
Medical Effect Sources
- 1 OG #18 - Compare The Strain comparethestrain.ca(opens in new tab)
- 2 OG #18 Seeds pacificseedbank.com(opens in new tab)
- 3 OG #18 Strain Review: A Comprehensive Growing Guide and Experience - GetBudsLegalize.com getbudslegalize.com(opens in new tab)
- 4 OG #18 Strain - Hybrid with Sedative Effects wayofleaf.com(opens in new tab)
- 5 The OG #18 - Ganjed ganjed.com(opens in new tab)
- 6 OG #18 Strain - Growing Tips and Medical Effects marijuana-guides.com(opens in new tab)
- 7 OG #18 - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 8 OG #18 Strain ilovegrowingmarijuana.com(opens in new tab)
- 9 OG #18 - Weed Strains leafly.com(opens in new tab)
- 10 OG #18 Strains supherbscanada.store(opens in new tab)
- 11 OG 18 thestrainseeds.com(opens in new tab)
- 12 The OG #18 Private Reserve OG askgrowers.com(opens in new tab)
- 13 The OG #18 Seeds by Reserva Privada growdiaries.com(opens in new tab)
13 verified sources
Mental Effects
- •Stress Relief
Reduces stress and anxious thoughts effectively
- •Anxiety Management
Alleviates anxiety without excessive sedation
- •Mood Enhancement
Elevates mood and promotes positive outlook
- •Depression Support
Helps manage depressive symptoms and negativity
Professor High visualization
Body Effects
- •Pain Management
Reduces chronic pain and muscle tension
- •Sleep Support
Promotes deep sleep and treats insomnia
- •Inflammation Reduction
Decreases inflammation and muscle spasms
- •Appetite Stimulation
Increases appetite and reduces nausea
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 OG #18?
OG #18 is a hybrid cannabis strain containing up to 26.0% THC, with a terpene profile dominated by Limonene and Caryophyllene. 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 16-26% · 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 · Concentrates
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
OG Kush × Afghani · bred by DNA Genetics, Reserva Privada
Lineage Sources
- 1 OG #18 - Compare The Strain comparethestrain.ca(opens in new tab)
- 2 The OG 18 (DNA Genetics) feminized zamnesia.com(opens in new tab)
- 3 OG #18 Seeds pacificseedbank.com(opens in new tab)
- 4 OG #18 Strain Review: A Comprehensive Growing Guide and Experience - GetBudsLegalize.com getbudslegalize.com(opens in new tab)
- 5 OG #18 Strain - Hybrid with Sedative Effects wayofleaf.com(opens in new tab)
- 6 The OG #18 - Ganjed ganjed.com(opens in new tab)
- 7 OG #18 Strain - Growing Tips and Medical Effects marijuana-guides.com(opens in new tab)
- 8 OG #18 - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 9 OG #18 Strain ilovegrowingmarijuana.com(opens in new tab)
- 10 OG #18 - Weed Strains leafly.com(opens in new tab)
- 11 OG #18 Strains supherbscanada.store(opens in new tab)
- 12 OG 18 thestrainseeds.com(opens in new tab)
- 13 The OG #18 Seeds by Reserva Privada growdiaries.com(opens in new tab)
13 verified sources
OG #18 is a hybrid strain primarily descended from OG Kush with various lineage reports including Afghani, Hindu Kush, and Lemon Thai genetics. Some sources indicate it originated in the 2000s.
Origin Timeline
First cultivated in 2007
Breeder
DNA Genetics, Reserva Privada
Seed Bank
Reserva Privada
Awards & Recognition
17 awards & mentions
Award Sources
- 1 OG #18 - Compare The Strain comparethestrain.ca(opens in new tab)
- 2 The OG 18 (DNA Genetics) feminized zamnesia.com(opens in new tab)
- 3 OG #18 Strain - Hybrid with Sedative Effects wayofleaf.com(opens in new tab)
- 4 The OG #18 - Ganjed ganjed.com(opens in new tab)
- 5 OG #18 - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 6 OG #18 Strain ilovegrowingmarijuana.com(opens in new tab)
- 7 OG #18 - Weed Strains leafly.com(opens in new tab)
- 8 OG #18 Strains supherbscanada.store(opens in new tab)
- 9 OG 18 thestrainseeds.com(opens in new tab)
- 10 The OG #18 Seeds by Reserva Privada growdiaries.com(opens in new tab)
10 verified sources
Competition Wins
The Full Story
Detailed Description
The long-form profile · ~5 min read
The OG #18 Legacy
OG #18, also known as Private Reserve or Reserve OG, stands as a testament to cannabis breeding excellence and award-winning genetics. This indica-dominant hybrid (70% indica/30% sativa) represents one of the most decorated strains from the legendary DNA Genetics and Reserva Privada breeding programs. Born in the mid-2000s and achieving widespread recognition by 2007, OG #18 has captured multiple High Times Cannabis Cup awards (2007, 2009, 2010) along with victories at the European Champions Cup and Spannabis Cannabis Champions Cup, cementing its status as a world-class cultivar that continues to captivate cannabis enthusiasts worldwide.
🧬 Genetic Heritage & Lineage
OG #18's genetic foundation rests primarily on the iconic OG Kush, one of cannabis culture's most revered parent strains. While the exact lineage contains some mystery—a hallmark of many legendary OG varieties—various reports indicate contributions from Afghani, Hindu Kush, and Lemon Thai genetics. This complex genetic tapestry creates a strain that honors its Kush heritage while introducing unique characteristics that distinguish it from its parent. Bred by the renowned teams at DNA Genetics and Reserva Privada in the 2000s, OG #18 emerged during the golden era of California cannabis breeding, when skilled cultivators were perfecting the OG Kush lineage into numerous award-winning phenotypes.
👃 Terpene Profile & Aromatics
The aromatic experience of OG #18 showcases a sophisticated terpene profile dominated by limonene (0.69%), which provides uplifting citrus notes and mood-enhancing properties. Supporting terpenes include beta-myrcene (0.29%), contributing sedating body effects and musky undertones, linalool (0.25%), adding calming floral lavender hints, alpha-pinene (0.13%), delivering sharp pine clarity, and beta-caryophyllene (0.08%), offering spicy pepper notes with anti-inflammatory potential. With a total terpene content around 2.19%, you'll encounter a pungent, diesel-forward aroma that immediately announces its OG heritage. The scent profile layers sour fuel notes with sweet pine, earthy kush, and subtle citrus accents, creating an olfactory experience that's both aggressive and refined. Some phenotypes reveal skunky undertones with hints of spice and musk, while the citrus notes provide brightness that cuts through the heavier diesel base.
👅 Flavor Experience
When you inhale OG #18, the initial flavor hits with bold diesel fuel characteristics mixed with sweet pine that coats your palate. Mid-palate, you'll notice the earthy, woody kush flavors developing, accompanied by sour citrus notes that add complexity and tang. The spicy pepper undertones from caryophyllene create a subtle burn, while sweeter notes balance the intensity. On the exhale, the flavor transforms into a pungent, hashy finish with lingering diesel and sour citrus that remains on your tongue long after consumption. Some users report subtle fruity or citrus sweetness that emerges, particularly when vaporized at lower temperatures, revealing the strain's nuanced flavor layers.
🎯 Effects & Experience
OG #18 delivers a powerful experience that begins within minutes of consumption, offering THC levels ranging from 16-26% (typically around 20-22%). You'll first notice a euphoric cerebral rush that elevates mood and brings a sense of happiness and contentment. This initial uplifting phase quickly transitions into deep physical relaxation that spreads throughout your body, melting tension and stress. The indica dominance becomes apparent as the effects peak, delivering strong body sedation accompanied by a tingly sensation and profound calmness. Despite the heavy body effects, OG #18 maintains mental clarity better than many indica-dominant strains, allowing for focused thoughts and even creative inspiration before the sedation fully takes hold. The experience lasts 2-4 hours, with effects intensifying over the first 30-60 minutes before gradually tapering into sleepiness that makes this strain ideal for evening use. You may experience increased appetite and a pleasant sense of being uplifted even as relaxation deepens.
💚 Medical & Therapeutic Potential
OG #18's balanced cannabinoid and terpene profile may help address numerous wellness concerns. The strain's stress-relieving properties are particularly notable, with the limonene and linalool combination potentially reducing anxious thoughts and promoting emotional balance. For pain management, the myrcene and caryophyllene content may provide significant relief from chronic pain, muscle tension, inflammation, and headaches. The strain's sedating qualities make it a popular choice for those seeking sleep support, as it may help quiet racing thoughts and encourage deep, restorative rest. Additionally, users report that OG #18 may help manage symptoms of depression through its mood-enhancing euphoria, while its appetite-stimulating properties could benefit those dealing with nausea or lack of appetite. The strain's effects on anxiety are dose-dependent—lower amounts may provide relief, while higher doses might increase anxious feelings in sensitive individuals.
👁️ Visual Characteristics
OG #18 produces visually stunning buds characterized by dense, compact structure typical of indica-dominant genetics. You'll observe deep forest green coloring as the primary hue, often accented with purple undertones and olive green shading throughout the buds. The flowers feature vibrant orange to rust-colored pistils that curl and twist throughout the bud structure, creating striking contrast against the darker green base. What truly sets OG #18 apart is its heavy trichome coverage—the buds glisten with crystalline resin glands that give them a frosted, sugar-coated appearance, reflecting the strain's potency. The trichomes often display amber to milky white coloring when fully mature, creating a shimmering effect under proper lighting.
🏆 Awards & Recognition
OG #18's trophy case speaks volumes about its quality and consistency. The strain captured 3rd Place Indica at the 2007 High Times Cannabis Cup, followed by 2nd Place Indica in 2009, and continued its winning streak at multiple international competitions including the 2010 High Times Cannabis Cup and European Champions Cup. Perhaps most impressively, OG #18 took 1st Place at the 2011 Spannabis Cannabis Champions Cup in the Hydro category and the Spannabis Indoor Hydro Cup 2010, demonstrating excellence in both cultivation methods and consumer appeal.
📜 Cultural Context & Consumer Considerations
As one of the numbered OG Kush phenotypes, OG #18 holds special significance in cannabis culture, representing the era when California breeders were methodically selecting and stabilizing the best OG genetics. The "#18" designation indicates this was the 18th phenotype isolated by Reserva Privada, and its multiple awards prove they chose wisely. Today, OG #18 remains readily available through various seed banks and dispensaries, maintaining popularity among both recreational users seeking potent relaxation and medical patients requiring strong therapeutic effects. Start low, go slow with this strain—its high THC content and heavy effects can overwhelm novice users. Experienced consumers will appreciate the complex effects profile that balances euphoria with sedation, making it versatile for various evening activities before ultimately guiding you toward restful sleep.
Research Methodology
How we compiled this strain profile
This strain profile was compiled from 21 published sources covering 'OG #18'. 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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