Strain experience guide
Galactic Jack
Also known as Space Jill
Galactic Jack is a sativa-dominant hybrid (70/30) combining Jack Herer and Space Queen genetics, delivering an energizing cerebral experience with citrus-forward flavors. Its dominant terpene profile features limonene, myrcene, and caryophyllene, creating bright lemon-grapefruit aromas with sweet pine undertones. Ideal for creative projects, social activities, and combating stress while maintaining mental clarity and productivity. Read more Show less
Quick Hits
What kind of high is Galactic Jack?
A sativa-dominant hybrid reported as uplifted, euphoric and energetic. Picked for watching tv/movies and focus & concentration at any time of day. The profile features sweet citrus flavor, herbal citrus aroma and myrcene as the lead terpene.
Terpenes help give cannabis its aroma. Compare citrus, pine and earthy notes to find what appeals to you. The profile offers clues, not a guaranteed high.
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.
Research associations
- Sedating
- Muscle relaxant
- Anti inflammatory
General terpene associations, not effects confirmed for this strain. Evidence varies.
- Caryophyllene Spicy, peppery, woody
- Limonene Citrus, lemon, orange
Ordered by measured share — the exact percentages shift with every batch and cure.
Reported effects, at a glance. Dose, tolerance and setting can change the experience.
- Euphoric
- Energetic
Ideas for your next session, drawn from strain reports. Find what fits your plans.
See the full list →What to look for when you open the jar, based on descriptions of this strain.
See the full profile →- Sweet
- Lemon
The reported taste, from the first impression to the finish. The batch and how you consume it can change what comes through.
See the full profile →- Lemon
- Grapefruit
- Best Time Anytime
- Era 1990
- Rarity Common
Genetics Sativa-Dominant Hybrid A guide to lineage, not a reliable predictor of the high.
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 Reported: dry mouth and dry eyes. Responses vary — start low, go slow. Review safety →
Worth knowing
The details that shape the experience
The memorable details
- Potent sativa-dominant hybrid with 16-26% THC from legendary Jack Herer x Space Queen genetics
- Bright citrus-forward flavor profile featuring lemon, grapefruit, and sweet pine aromatics
- Delivers focused cerebral energy and creative euphoria perfect for daytime productivity
- Balanced effects combine mental clarity with gentle physical relaxation minus couch-lock
Explore the full profile Complete experience record
Mind, body, and energy
Best enjoyed during anytime
Balanced for any time of day
Activities people choose it for
Effect Sources
- 1 Galactic Jack by Sin City Seeds: A Comprehensive Strain Guide - Blog - JointCommerce app.jointcommerce.com(opens in new tab)
- 2 Galactic Jack Seeds pacificseedbank.com(opens in new tab)
- 3 Galactic Jack Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 4 Galactic Jack Weed Strain Information leafly.com(opens in new tab)
- 5 Galactic Jack - Strain Information - CannaConnection cannaconnection.com(opens in new tab)
- 6 Buy Galactic Jack AAAA Online mmjexpress.cc(opens in new tab)
- 7 Galactic Jack Strain - Full info & Reviews | AskGrowers askgrowers.com(opens in new tab)
- 8 Galactic Jack - Green Ganja Home greenganjahome.com(opens in new tab)
- 9 Galactic Jack - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 10 Galactic Jack Strain - Hybrid Cannabis Review, 26.0 ... hytiva.com(opens in new tab)
- 11 Galactic Jack (SubCool's The Dank) :: Cannabis Strain Info seedfinder.eu(opens in new tab)
- 12 Galactic Jack | hybrid Weed Strain cannapages.com(opens in new tab)
- 13 highburg.ca highburg.ca(opens in new tab)
- 14 Galactic Jack Galactic Jack - Greenfield Garden | Washington DC thegreenfieldgarden.com(opens in new tab)
- 15 Galactic Jack | None% thc, None% cbd, None% tac | strainsdb.com(opens in new tab)
15 verified sources
Therapeutic reports
Medical Effect Sources
- 1 Galactic Jack by Sin City Seeds: A Comprehensive Strain Guide - Blog - JointCommerce app.jointcommerce.com(opens in new tab)
- 2 Galactic Jack Seeds pacificseedbank.com(opens in new tab)
- 3 Galactic Jack Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 4 Galactic Jack Weed Strain Information leafly.com(opens in new tab)
- 5 Buy Galactic Jack AAAA Online mmjexpress.cc(opens in new tab)
- 6 Galactic Jack Strain - Full info & Reviews | AskGrowers askgrowers.com(opens in new tab)
- 7 Galactic Jack - Green Ganja Home greenganjahome.com(opens in new tab)
- 8 Galactic Jack - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 9 Galactic Jack Strain - Hybrid Cannabis Review, 26.0 ... hytiva.com(opens in new tab)
- 10 highburg.ca highburg.ca(opens in new tab)
10 verified sources
Mental Effects
- •Stress Relief
Reduces mental tension and racing thoughts
- •Anxiety Management
Alleviates anxiety symptoms through cerebral effects
- •Mood Elevation
Enhances mood and promotes positive mindset
- •Focus Enhancement
Improves mental clarity and concentration
Professor High visualization
Body Effects
- •Pain Management
Reduces chronic pain and physical discomfort
- •Muscle Tension Relief
Eases muscle stiffness and spasms
- •Fatigue Reduction
Combats tiredness and boosts energy levels
- •Migraine Relief
Helps alleviate headache and migraine symptoms
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.
Side effects and safer use
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.
Keep listening Music neighborhood
Sound neighborhood
Follow Galactic Jack into Relaxing High music.
TIWIH classifies this strain within the Relaxing High chemistry pattern. Separately, our editorial music map associates the same family with these sounds. It is a creative bridge—not a prediction or artist endorsement.
Open the jar
Aroma, flavor, and chemistry
Look closer Full sensory specimen
Aroma and flavor
Aroma & Flavor Sources
- 1 Galactic Jack by Sin City Seeds: A Comprehensive Strain Guide - Blog - JointCommerce app.jointcommerce.com(opens in new tab)
- 2 Galactic Jack Seeds pacificseedbank.com(opens in new tab)
- 3 Galactic Jack Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 4 Galactic Jack Weed Strain Information leafly.com(opens in new tab)
- 5 Galactic Jack - Strain Information - CannaConnection cannaconnection.com(opens in new tab)
- 6 Buy Galactic Jack AAAA Online mmjexpress.cc(opens in new tab)
- 7 Galactic Jack Strain - Full info & Reviews | AskGrowers askgrowers.com(opens in new tab)
- 8 Galactic Jack - Green Ganja Home greenganjahome.com(opens in new tab)
- 9 Galactic Jack - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 10 Galactic Jack Strain - Hybrid Cannabis Review, 26.0 ... hytiva.com(opens in new tab)
- 11 Galactic Jack (SubCool's The Dank) :: Cannabis Strain Info seedfinder.eu(opens in new tab)
- 12 Galactic Jack | hybrid Weed Strain cannapages.com(opens in new tab)
- 13 highburg.ca highburg.ca(opens in new tab)
- 14 Galactic Jack Galactic Jack - Greenfield Garden | Washington DC thegreenfieldgarden.com(opens in new tab)
14 verified sources
Aromas
Flavors
Terpene profile
Terpene Sources
- 1 Galactic Jack by Sin City Seeds: A Comprehensive Strain Guide - Blog - JointCommerce app.jointcommerce.com(opens in new tab)
- 2 Galactic Jack Seeds pacificseedbank.com(opens in new tab)
- 3 Galactic Jack Weed Strain Information leafly.com(opens in new tab)
- 4 Buy Galactic Jack AAAA Online mmjexpress.cc(opens in new tab)
- 5 Galactic Jack Strain - Full info & Reviews | AskGrowers askgrowers.com(opens in new tab)
- 6 Galactic Jack - Green Ganja Home greenganjahome.com(opens in new tab)
- 7 Galactic Jack | hybrid Weed Strain cannapages.com(opens in new tab)
- 8 Galactic Jack | None% thc, None% cbd, None% tac | strainsdb.com(opens in new tab)
8 verified sources
Terpene Distribution
Terpene profile: Myrcene 0.3%, Caryophyllene 0.2%, Limonene 0.1%, Geraniol 0.1%, Terpineol 0.1%, Pinene 0.1%, Terpinolene 0.1%, Linalool 0.0%, Humulene 0.0%, Ocimene 0.0% .
Myrcene Dominant
Flavor: Earthy, musky, fruity
Full Profile
Myrcene
0.3%
Flavor Profile:
Earthy, musky, fruity
Effects:
Caryophyllene
0.18%
Flavor Profile:
Spicy, peppery, woody
Effects:
Limonene
0.13%
Flavor Profile:
Citrus, lemon, orange
Effects:
Geraniol
0.11%
Terpineol
0.11%
Pinene
0.06%
Flavor Profile:
Pine, fresh forest
Effects:
Terpinolene
0.05%
Flavor Profile:
Fresh, piney, floral, citrus
Effects:
Linalool
0.03%
Flavor Profile:
Floral, lavender, sweet
Effects:
Humulene
0.03%
Flavor Profile:
Hoppy, woody, earthy
Effects:
Ocimene
0.01%
Flavor Profile:
Sweet, herbaceous, woody
Effects:
Appearance
Color Palette
Texture
Dense, spade-shaped buds with tight structure and heavy resin production characteristic of premium sativa-dominant hybrids
Crystal Density
very high
Exceptional crystal coverage
Batch context Complete cannabinoid record
There’s more to a strain than THC%.
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
03 · AI interpretation
Professor High interprets the pattern
The moment Galactic Jack takes hold, I feel this incredible mental sharpness—like someone just adjusted the focus on my entire consciousness. My thoughts become crystal clear yet beautifully interconnected, each idea flowing into the next with remarkable ease. There's this uplifting euphoria washing through my mind, not overwhelming but persistent, like floating on a cloud of creative potential.
What fascinates me is how this strain manages to be energizing without causing anxiety. My body feels pleasantly loose, tension melting away from my shoulders, but there's zero couch-lock. Instead, I feel motivated to engage with the world—conversations become more engaging, creative projects more compelling. The citrus terpenes are clearly at work here, that limonene creating this sunny disposition while the myrcene provides just enough mellowness to keep things balanced.
The experience peaks beautifully around the hour mark, where focus and euphoria reach perfect equilibrium. I'm noticing details I'd normally miss, making connections between concepts that seemed unrelated before. This is what cannabis education is all about—understanding how specific terpene profiles and cannabinoid ratios create predictable, beneficial effects. Galactic Jack demonstrates sativa dominance at its finest.
Read this as an interpretation of the profile—not clinical advice, a product rating, or a guarantee.
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The helpful detail
Galactic Jack: A Stellar Journey Through Legendary Cannabis Genetics
Welcome to Galactic Jack, a strain that lives up to its cosmic name by delivering an out-of-this-world cerebral experience combined with legendary genetics. This sativa-dominant hybrid (70% Sativa / 30% Indica) represents the pinnacle of modern cannabis breeding, offering an uplifting, energizing high that's perfect for creative endeavors, social situations, and daytime productivity. With THC levels ranging from 16.67% to 26%, Galactic Jack delivers a potent yet manageable experience that appeals to both novice and experienced consumers.
🧬 Genetic Heritage & Lineage
Galactic Jack's impressive pedigree stems from the union of two cannabis legends: Jack Herer and Space Queen. Created by TGA Subcool Seeds Company during the 1990s, this strain inherits the best traits from both parents. Jack Herer brings its renowned uplifting cerebral effects and piney, spicy aromatics, while Space Queen contributes sweet, fruity notes and an extra boost of creativity. This genetic combination has also earned Galactic Jack the affectionate nickname "Space Jill" among enthusiasts. The strain's creation represents a deliberate effort to craft a sativa-dominant hybrid that maintains focus and energy while providing a pleasant euphoric backdrop.
👃 Terpene Profile & Aromatics
The terpene profile of Galactic Jack is where science meets sensory delight. Myrcene dominates at 0.30%, providing a foundational earthy sweetness, while Caryophyllene (0.18%) adds spicy, peppery notes and potential anti-inflammatory benefits. Limonene (0.13%) brings the signature citrus brightness that defines this strain's aroma, and Geraniol and Terpineol (both at 0.11%) contribute floral and pine nuances.
When you open a container of Galactic Jack, you'll immediately notice the intense citrus aroma dominated by lemon and grapefruit notes. As you break apart the buds, sweet pine undertones emerge, complemented by herbal and spicy accents. Some phenotypes reveal subtle woody and skunky notes that add depth and complexity. This aromatic profile isn't just pleasant—it's a preview of the multifaceted experience to come.
👅 Flavor Experience
Galactic Jack's flavor journey is equally impressive. On the inhale, you'll taste bright citrus with pronounced lemon and grapefruit flavors that dance across your palate. The mid-palate reveals sweet, honey-like notes that balance the tartness, while herbal and piney undertones add complexity. The exhale leaves you with a lingering sweetness tinged with subtle skunk and earthy spice that invites another taste. Many users note that vaporizing this strain at lower temperatures (around 350-370°F) preserves the delicate citrus terpenes while higher temperatures bring out the deeper woody and spicy notes.
🎯 Effects & Experience
Galactic Jack delivers a cerebral-focused high that begins within minutes of consumption. You'll first notice a wave of mental clarity and enhanced focus that sharpens your thoughts without causing racing or anxiety. This initial phase lasts 15-30 minutes and transitions into a euphoric, uplifted state characterized by increased creativity and motivation. Many users report feeling energized yet relaxed—a balanced effect that makes this strain ideal for daytime use.
The mental effects peak around 45-60 minutes after consumption and can last 2-4 hours depending on dosage and individual tolerance. Unlike some heavy sativas, Galactic Jack provides this cerebral stimulation without significant body sedation, though you may notice mild physical relaxation that eases tension without couch-lock. The high maintains a happy, sociable quality throughout, making it excellent for group activities or solo creative work.
🎮 Use Cases & Activities
Galactic Jack excels in scenarios requiring mental engagement and creativity. It's perfect for creative projects like writing, painting, or music production, where its focus-enhancing properties help you enter a flow state. The strain's energizing effects make it ideal for physical activities like hiking or yoga, while its sociable nature shines during conversations and social gatherings. Many medical cannabis patients use Galactic Jack for daytime symptom management when they need to remain functional and productive.
💚 Medical & Therapeutic Potential
Galactic Jack may offer significant therapeutic benefits, particularly for mental health conditions. The strain's mood-elevating properties may help individuals managing depression, while its focus-enhancing effects could benefit those with ADHD. The high limonene content suggests potential for stress and anxiety relief, though novice users should start with low doses as high-THC strains can occasionally trigger anxiety in sensitive individuals. For physical symptoms, the caryophyllene content may provide anti-inflammatory benefits and pain relief, while the overall energizing effect may combat fatigue and low motivation.
👁️ Visual Characteristics
Galactic Jack produces visually stunning buds with dense, spade-shaped structures characteristic of its Jack Herer lineage. The flowers display deep forest green coloration with occasional purple undertones in cooler growing conditions. Fiery orange pistils curl throughout the buds, creating striking contrast against the green backdrop. Perhaps most impressive is the heavy trichome coverage—these buds glisten with crystalline resin that speaks to their potency and gives them a frosted, almost glowing appearance that justifies the "galactic" name.
🏆 Awards & Recognition
Galactic Jack has earned recognition as one of the top 10 Jack Herer hybrid strains according to Cannaconnection.com, cementing its place among elite cannabis genetics. This recognition reflects not only its genetic pedigree but also its consistent quality and user satisfaction across multiple growing seasons and phenotypes.
⚠️ Consumer Considerations
Galactic Jack is suitable for intermediate to advanced users due to its moderate-to-high THC content. Beginners should start with small doses (one or two puffs if smoking/vaping) and wait 15-20 minutes to assess effects. The most commonly reported side effects include dry mouth and dry eyes, which are easily managed with hydration and eye drops. Some users may experience mild paranoia at higher doses, particularly if prone to THC-induced anxiety. This strain is best consumed during morning or afternoon hours when you can take advantage of its energizing properties, though some users enjoy it for early evening social activities.
Practical guide How people use it
Recommended Methods
Where it comes from Origins and lineage
Lineage Sources
- 1 Galactic Jack by Sin City Seeds: A Comprehensive Strain Guide - Blog - JointCommerce app.jointcommerce.com(opens in new tab)
- 2 Galactic Jack Seeds pacificseedbank.com(opens in new tab)
- 3 Galactic Jack Marijuana Strain Information & Reviews allbud.com(opens in new tab)
- 4 Galactic Jack Weed Strain Information leafly.com(opens in new tab)
- 5 Galactic Jack - Strain Information - CannaConnection cannaconnection.com(opens in new tab)
- 6 Buy Galactic Jack AAAA Online mmjexpress.cc(opens in new tab)
- 7 Galactic Jack Strain - Full info & Reviews | AskGrowers askgrowers.com(opens in new tab)
- 8 Galactic Jack - Green Ganja Home greenganjahome.com(opens in new tab)
- 9 Galactic Jack - Strain Information – Royal King Seeds royalkingseeds.com(opens in new tab)
- 10 Galactic Jack Strain - Hybrid Cannabis Review, 26.0 ... hytiva.com(opens in new tab)
- 11 Galactic Jack (SubCool's The Dank) :: Cannabis Strain Info seedfinder.eu(opens in new tab)
- 12 highburg.ca highburg.ca(opens in new tab)
- 13 Galactic Jack Galactic Jack - Greenfield Garden | Washington DC thegreenfieldgarden.com(opens in new tab)
13 verified sources
A sativa-dominant hybrid cross between Jack Herer and Space Queen, created by TGA Subcool Seeds Company and other breeders. Known for uplifting and energetic effects with citrus and pine aromatics.
Genetics
Origin Timeline
First cultivated in 1990
Breeder
TGA Subcool Seeds Company
Seed Bank
Pacific Seed Bank
On the record Awards and recognition
Award Sources
1 verified source
Notable Mentions
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Evidence and limits
Research notes
This profile assembles public facts in original language, links its supporting sources, and keeps gaps or disagreements visible. It is research provenance—not product or lab certification.
- Linked sources
- 20
- Sourced sections
- 9
- Claims under review
- 77
- Profile updated
- Aug 31, 2026
Research Edition Current profile edition
Updated August 31, 2026 · 9 profile areas with section-level sourcing Featured research profile
This edition records This Is Why I'm High’s synthesis of published information about Galactic Jack. It describes source-supported patterns and uncertainty; it does not certify genetics, potency, safety, or any product batch.
- Profile sources
- 20
- Research evidence confidence
- 70%
- Edition date
- August 31, 2026
Evidence confidence summarizes source coverage and consistency for this profile synthesis. It is not a product rating, potency score, or guarantee about any batch.
Source coverage in this edition
- Classification 15 sources
- Lineage 13 sources
- Cannabinoids 11 sources
- Terpenes 8 sources
- Reported effects 15 sources
- Aromas 14 sources
- Flavors 14 sources
- Reported medical uses 10 sources
- Awards 1 source
History tracking is active
Material changes are recorded as new editions using factual categories and source metadata. Source article prose and reviews are not copied into the history.
Research context What published research says
What does the research say about Galactic Jack?
Galactic Jack is a sativa cannabis strain containing up to 26.0% THC, with a terpene profile dominated by Myrcene 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.
Power-user detail Open sources and methodology
Research Methodology
How we compiled this strain profile
This strain profile was compiled from 20 published sources covering 'Galactic Jack'. 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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Flag a name, lineage, source, image, or chemistry issue for private editorial review.