Galactic Jack

aka 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. With THC levels reaching 16-26%, this strain offers uplifting euphoria, enhanced focus, and creative motivation perfect for daytime use. 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.

The Short Answer

What kind of high is Galactic Jack?

Myrcene-led and sweet-citrus on the palate, most often reported uplifted and picked for watching tv/movies.

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.

High Family
Relaxing High
Deep Body Relaxation
🔥 THC-Dominant
Dominant Terpenes
Myrcene
Smells Earthy, musky, fruity
  • Sedating
  • Muscle relaxant
  • Anti inflammatory
  • Caryophyllene Spicy, peppery, woody
  • Limonene Citrus, lemon, orange

Ordered by measured share — the exact percentages shift with every batch and cure.

How It Feels
Uplifted
  • Euphoric
  • Energetic
Best For
Tastes Like
Sweet citrus
  • Lemon
  • Grapefruit
Smells Like
Herbal citrus
  • Sweet
  • Lemon
  • Best Time anytime
  • Era 1990
  • Rarity Common

Genetics Sativa-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 →

Strain Highlights

Key insights at a glance

1
Potent sativa-dominant hybrid with 16-26% THC from legendary Jack Herer x Space Queen genetics
2
Bright citrus-forward flavor profile featuring lemon, grapefruit, and sweet pine aromatics
3
Delivers focused cerebral energy and creative euphoria perfect for daytime productivity
4
Balanced effects combine mental clarity with gentle physical relaxation minus couch-lock

The Experience

Professor High Avatar

Professor High Says...

In-depth strain breakdown from Professor High, our AI cannabis expert

4.4 / 5 Rated 4.4 out of 5 by Professor High

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.

Sativa-Dominant Hybrid
Myrcene Forward
anytime Use

Effects Profile

Uplifted · Euphoric · Energetic
Uplifted Euphoric Energetic Focused

Best enjoyed during anytime

Balanced for any time of day

Best For

Watching TV/Movies · Focus & Concentration · Creative Projects

Look, Aroma & Taste

Aroma & Flavor

Citrus · Sweet · Herbal

Aromas

Citrus
Sweet
Herbal
Lemon

Flavors

Citrus
Sweet
Lemon
Grapefruit

Terpene Profile

Myrcene leads · 10 terpenes mapped
Total Terpene Content: 1.01% (Average)

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

Sedating Muscle relaxant Anti-inflammatory

Caryophyllene

Flavor: Spicy, peppery, woody

Anti-inflammatory Pain relief Anti-anxiety

Limonene

Flavor: Citrus, lemon, orange

Anxiety reduction Mood elevation Stress relief

Geraniol

Terpineol

Pinene

Flavor: Pine, fresh forest

Alertness Memory retention Bronchodilator

Terpinolene

Flavor: Fresh, piney, floral, citrus

Uplifting Antioxidant Antibacterial

Linalool

Flavor: Floral, lavender, sweet

Calming Anti-anxiety Sedative

Humulene

Flavor: Hoppy, woody, earthy

Appetite suppressant Anti-inflammatory Antibacterial

Ocimene

Flavor: Sweet, herbaceous, woody

Antiviral Antifungal Decongestant

Appearance

Deep forest green · Vibrant lime green

Color Palette

deep forest green
vibrant lime green
purple undertones
fiery orange pistils
golden amber trichomes
rust-colored hairs

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

Chemistry & Research

Medical Effects

8 reported therapeutic uses on file

Mental Effects

60 %
  • 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

40 %
  • 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.

What Research Says

Peer-reviewed studies, terpene science & safety guidance

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.

Educational resources only — not medical advice. Always consult a qualified clinician for health decisions.

Cannabinoids (THC & CBD)

THC 16.67-26% · 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.

Type I THC-Dominant

High THC (>15%), low CBD (<1%) - Most common recreational strains

Reported THC Range
16.67-26%

Using It Well

Consumption Methods

Vaping · Smoking · Concentrates

Recommended Methods

Vaping
Smoking
Concentrates
Tinctures

Side Effects

Dry Mouth · Dry Eyes · +2 more

Side effects vary by individual. Start low, go slow. Consult a healthcare professional with concerns.

Dry Mouth
Dry Eyes
Paranoia
Dizziness

These are commonly reported effects. Individual experiences may vary based on dosage, tolerance, and consumption method.

Where It Comes From

Lineage & History

Jack Herer × Space Queen · bred by TGA Subcool Seeds Company

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

Jack Herer × Space Queen

Origin Timeline

First cultivated in 1990

Breeder

TGA Subcool Seeds Company

Seed Bank

Pacific Seed Bank

Awards & Recognition

1 award & mention

Notable Mentions

Top 10 Jack Herer hybrid strains
cannaconnection.com
View Source (opens in new tab)

The Full Story

Detailed Description

The long-form profile · ~4 min read

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.

Research Methodology

How we compiled this strain profile

70%
Data Confidence

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

Terpenes Low (8 sources)
Effects Low (15 sources)
Lineage High (13 sources)
Medical Low (10 sources)
Aromas Low (14 sources)
Cannabinoids Low (11 sources)
Last updated: August 14, 2026

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