Black Jack
Also known as: Blackjack, Black Jack®, SWS01
Breeder: Sweet Seeds
Black Jack (SWS01) is one of Sweet Seeds' flagship cultivars, bred from an elite Black Domina '98 clone crossed with an exceptional Jack Herer clone selected for its intense Haze-type incense aroma. The result is a balanced, high-vigor hybrid that combines the bud density and resin output of Black Domina with the cerebral stimulation and complex terpene profile of Jack Herer. Known as a heavy resin producer, it adapts well to both indoor and outdoor environments and has accumulated 10 cannabis cup awards since 2008, including a Best Hashish prize. Growers praise its rock-hard bud structure, slow tolerance build, and strong hybrid vigor, though it can be slightly finicky with magnesium uptake. Black Jack occupies a unique position in Sweet Seeds' lineup as their flagship "complete package" strain—it delivers high yields, fast flowering, potent effects, and complex aromatics all in one plant without forcing the grower to compromise on any single attribute. The Black Domina '98 parent contributes structural integrity, resin production, and a sweetened earthy base note, while the Jack Herer parent provides the complex spicy-incense Haze aromatics, cerebral stimulation, and elevated mood effects. The resulting 50/50 balance means the high provides both mental stimulation (creativity, happiness, social energy from the Jack Herer side) and physical relaxation (body calm, muscle release from the Black Domina side) without overwhelming in either direction. THC ranges 16-21% with approximately 1% CBD. Dominant terpenes include limonene, pinene, and beta-caryophyllene, producing notes of citrus, pine, earthy wood, and spices overlaid with that signature cathedral incense character.
Lineage & Genetics
Cross: Black Domina '98 x Jack Herer
Black Domina '98 — Sweet Seeds' in-house selection of Sensi Seeds' Black Domina (Afghan x Ortega x Northern Lights x Hash Plant), a four-way indica cross known for extreme resin production, dark coloration, and dense bud structure. Jack Herer — Sensi Seeds' legendary sativa-dominant hybrid (Northern Lights #5 x Haze C) x (Skunk #1 x Haze C), renowned for its cathedral-incense Haze aroma, cerebral energy, and multiple Cannabis Cup wins.
Lineage Dispute
Sweet Seeds (breeder) lists Black Jack as a 50/50 Indica-Sativa hybrid. Many dispensary databases and review sites (AllBud, HeyAbby, NoKidsAllowed) report it as 70% Indica / 30% Sativa. The breeder's own data sheet is the authoritative source; the 70/30 figure appears to be an error propagated across secondary databases.
Terpene Profile
Terpinolene — Complex floral-citrus-pine character with herbal freshness
Caryophyllene — Sharp spice reinforcing fuel and diesel character
Ocimene — Sweet, herbaceous with tropical and woody undertones
Myrcene — Earthy, musky base grounding the fuel-forward profile
Pinene — Resinous pine adding solvent-like sharpness to fuel
Limonene — Sharp citrus edge contrasting fuel undertones
Humulene — Hoppy earth reinforcing heavy, dank undertones
Aroma: Immediately recognizable pine-forward nose with a complex cathedral-incense backbone inherited from Jack Herer. Secondary notes of lemon-citrus, black pepper, fresh-cut wood, and earthy spice. A subtle floral-tropical sweetness from ocimene rounds out the profile. Nose intensifies significantly after 3–4 weeks of curing.
Flavor: Very pronounced Haze character on the inhale — woody, incense-laden, and slightly sweet. The exhale shifts to pure spicy pine with peppery and citrus undertones. Some phenotypes show a surprising bubble-gum sweetness on the back end. Smooth smoke that does not produce a choking effect.
Effects & Experience
Onset: Fast-acting; cerebral effects begin within 5–15 minutes of consumption.
Opens with an uplifting, euphoric head rush that brings mental clarity, focus, and creative energy. Gradually transitions into a smooth full-body relaxation that soothes muscle tension without heavy sedation. The balance between stimulation and calm makes it versatile — energizing at lower doses, more meditative and spacey at higher doses. Users consistently report elevated mood and a sense of happiness.
Duration: 1.5–3 hours depending on dose and tolerance. Tolerance builds very slowly, which is notable among hybrids.
Commonly Reported Uses
Grower's Notes
Black Jack by Sweet Seeds is a perfectly balanced hybrid (50% indica / 50% sativa) created by crossing their elite Black Domina '98 clone with an exceptional Jack Herer selection known for its intense Haze-like cathedral incense aroma. Designated SWS01 in Sweet Seeds' catalog, it is one of their most iconic and productive strains—combining the resin-drenched potency of Black Domina with the complex, spicy-incense aromatic profile of Jack Herer.
Growth Structure and Training
The plant displays exceptional hybrid vigor with well-balanced growth characteristics. It develops a robust frame with strong lateral branching that gives plants a spherical shape when left untrained. The structure combines the best of both parent typologies: indica-like density and compactness in the center with sativa-like branch extension at the periphery. This balanced architecture makes it highly adaptable to multiple training methods.
Growth Structure and Training
Indoor cultivation is straightforward. Black Jack responds well to SOG (Sea of Green), SCROG, topping, and LST—essentially any training technique you prefer will work. For SOG, use 9-16 plants per square meter with minimal veg time, allowing single colas to develop. For SCROG, top once or twice and fill a net during a 3-4 week vegetative phase. The plant's naturally vigorous branching makes it fill space efficiently.
Vegetative conditions
18/6 light at 400-600 PPFD, temperatures 72-80F, humidity 55-65%. Feed at moderate-to-heavy levels (1.2-1.8 EC) with a balanced NPK ratio. The plant tolerates higher nutrient loads without burning—a hallmark of its hybrid vigor. Growth rate is fast and consistent.
Flowering Time and Harvest
Flowering time is an efficient 9 weeks (63 days), which is remarkably short for a strain with such significant Jack Herer and Haze influence. Most phenotypes finish reliably within this window. Transition to bloom nutrients at the flip, emphasizing phosphorus and potassium as buds develop. The stretch is moderate (1.5-2x), manageable for most indoor spaces.
Environment and Climate
During flower, maintain 68-78F with humidity below 50%. The buds develop into long, dense colas along the lateral branches—resinous and tightly packed. Trichome production is exceptional on both bud and surrounding foliage, making this an excellent strain for hash or extract production. The aromatic profile intensifies through flower: earthy citrus and pine with the distinctive cathedral-incense Haze note from the Jack Herer parent, softened by the sweet undertones of Black Domina.
Yield
Yields are among the best in Sweet Seeds' catalog: 500-600 g/m² indoors is achievable with proper technique, and some experienced growers push past 600 g/m² with optimized conditions. Outdoors, the plant transforms into a resinous giant reaching approximately 3 meters when planted directly in the ground with full sun—producing 500-700 g/plant. Outdoor harvest falls in early October in the Northern Hemisphere.
Wash and Extraction
The plant's thick resin production combined with balanced hybrid effects (psychoactive, stimulating, happiness-inducing) at 16-21% THC makes it versatile for both flower and extraction markets. A standard 10-14 day dry followed by 2-3 week cure brings out the full complexity of the terpene profile.
History & Origin
Black Jack (SWS01) was one of the earliest releases in the Sweet Seeds catalog, bred in Valencia, Spain, from an elite Black Domina clone selected in 1998 and a standout Jack Herer pheno chosen for its intense Haze-incense aroma. It quickly became one of their most iconic and best-selling strains, earning 10 cannabis competition awards between 2008 and 2017 across Spain, Italy, Argentina, and Uruguay. Sweet Seeds subsequently expanded the line with Black Jack Auto, Black Jack F1 Fast Version (SWS49, crossing S.A.D. Auto with the original Jack Herer clone for 7–8 week flowering), and Black Jack CBD (SWS68, a 1:1 THC:CBD version).
Awards & Recognition
- ●1st Prize — Indoor Hydro — III Encuentro Por La Normalización Y El Consumo Responsable, El Punto, Málaga, 2008
- ●2nd Prize — Best Hashish — X Revolta Verde, Girona, 2008
- ●3rd Prize — Outdoor — V Copa Bitox, Sabadell, 2008
- ●1st Prize — Indoor Hydro — IV Encuentro Por La Normalización Y El Consumo Responsable, El Punto, Málaga, 2009
- ●2nd Prize — Indoor — Fumaria, Lleida, 2009
- ●3rd Prize — Indoor Hydro — 1st Copa THC Skunk, Donostia, 2009
- ●2nd Prize — Outdoor — Cata Copa de Cultivadores de Cannabis (CCCC), Argentina, 2012
- ●2nd Prize — Indoor Hydro — VII Copa del Gremi Growshops Catalunya Profesional, Vilanova del Camí, 2014
- ●1st Prize — Indoor — I Certamen de Horticultura Cannábica, Montevideo, Uruguay, 2016
- ●2nd Prize — Outdoor — Secret Cup Napoli, Italy, 2017
- ●VII Copa del Gremi Growshops Catalunya
- ●Secret Cup Napoli (Exterior category)
- ●Multiple Spanish cannabis cup recognitions
Notable Crosses
Strains bred using Black Jack as a parent:
Frequently Asked Questions
7 common questions about Black Jack
What is Black Jack and what are its genetics?
Black Jack is a hybrid cannabis strain (50% Indica / 50% Sativa) bred by Sweet Seeds. It is a cross of Black Domina '98 x Jack Herer, testing at 16–21% THC. Black Jack (SWS01) is one of Sweet Seeds' flagship cultivars, bred from an elite Black Domina '98 clone crossed with an exceptional Jack Herer clone selected for its intense Haze-type incense aroma. The result is a balanced, high-vigor hybrid that combines the bud density and resin output of Black Domina with the cerebral stimulation and complex terpene profile of Jack Herer.
What does Black Jack smell and taste like?
Black Jack's dominant terpenes are Terpinolene, Caryophyllene. The aroma is described as immediately recognizable pine-forward nose with a complex cathedral-incense backbone inherited from jack herer. secondary notes of lemon-citrus, black pepper, fresh-cut wood, and earthy spice. a subtle floral-tropical sweetness from ocimene rounds out the profile. nose intensifies significantly after 3–4 weeks of curing.. The flavor profile features very pronounced haze character on the inhale — woody, incense-laden, and slightly sweet. the exhale shifts to pure spicy pine with peppery and citrus undertones. some phenotypes show a surprising bubble-gum sweetness on the back end. smooth smoke that does not produce a choking effect..
What are the effects of Black Jack?
Fast-acting; cerebral effects begin within 5–15 minutes of consumption. Opens with an uplifting, euphoric head rush that brings mental clarity, focus, and creative energy. Gradually transitions into a smooth full-body relaxation that soothes muscle tension without heavy sedation. Duration is typically 1.5–3 hours depending on dose and tolerance. tolerance builds very slowly, which is notable among hybrids.. Commonly reported uses include Daytime productivity, Creative work, Social gatherings, Stress relief.
How hard is Black Jack to grow?
Black Jack is rated easy to intermediate difficulty. It flowers in 9 weeks, reaches medium-tall in height, and yields 500-600 g/m² indoors. Best suited for indoor, outdoor environments.
What are the parent strains of Black Jack?
Black Jack is a cross of Black Domina '98 and Jack Herer. Black Domina '98 — Sweet Seeds' in-house selection of Sensi Seeds' Black Domina (Afghan x Ortega x Northern Lights x Hash Plant), a four-way indica cross known for extreme resin production, dark coloration, and dense bud structure. Jack Herer — Sensi Seeds' legendary sativa-dominant hybrid (Northern Lights #5 x Haze C) x (Skunk #1 x Haze C), renowned for its cathedral-incense Haze aroma, cerebral energy, and multiple Cannabis Cup wins..
What strains were bred from Black Jack?
Black Jack has been used as a parent in several notable crosses, including Sweet Cheese, Colombian Jack, Black Abyss, Black Jack CBD, Black Jack F1 Fast Version. Its genetics contribute to a wide range of modern cultivars.
Has Black Jack won any cannabis awards?
Yes. Black Jack has received recognition including 1st Prize — Indoor Hydro — III Encuentro Por La Normalización Y El Consumo Responsable, El Punto, Málaga, 2008; 2nd Prize — Best Hashish — X Revolta Verde, Girona, 2008; 3rd Prize — Outdoor — V Copa Bitox, Sabadell, 2008.
Sources & References (22)
- Sweet Seeds official product page: https://sweetseeds.com/en/photoperiod-dependent-seeds/28-black-jack.html
- SeedFinder.eu strain info & grower review (user: Jubei): https://seedfinder.eu/en/strain-info/black-jack/sweet-seeds
- SeedFinder.eu strain review detail: https://seedfinder.eu/en/strain-info/black-jack/sweet-seeds/review/03161897732628551
- AllBud strain database: https://www.allbud.com/marijuana-strains/indica-dominant-hybrid/blackjack
- AskGrowers terpene profile: https://askgrowers.com/strains/black-jack-strain-review
- CannaConnection strain info: https://www.cannaconnection.com/strains/black-jack
- JointCommerce comprehensive guide (terpene lab ranges): https://app.jointcommerce.com/blog/category/cannabis-101/blackjack-strain-a-comprehensive-strain-guide/
- Green Parrot seed bank listing: https://greenparrotseeds.com/en/seeds/317-black-jack
- Kannabia Seeds — Colombian Jack (notable cross): https://us.kannabia.com/feminized-cannabis-seeds/colombian-jack/
- Sweet Seeds — Sweet Cheese (notable cross): https://sweetseeds.com/en/photoperiod-dependent-seeds/48-112-sweet-cheese.html
- Grower's Notes cultivation sources:
- https://sweetseeds.com/en/photoperiod-dependent-seeds/28-black-jack.html
- https://www.cannaconnection.com/strains/black-jack
- https://greenparrotseeds.com/en/seeds/317-black-jack
- https://www.icmag.com/threads/the-complete-sweet-seeds-strain-guide.302655/page-2
- https://www.attitudeseedbankusa.com/sweet-seeds-black-jack/prod_1293
- https://www.leafly.com/strains/black-jack
- https://weedmaps.com/strains/black-jack
- https://seedfinder.eu/en/strain-info/black-jack/sweet-seeds
- https://www.allbud.com/marijuana-strains/hybrid/black-jack
- https://www.wikileaf.com/strain/black-jack/
- https://www.ilovegrowingmarijuana.com/strains/black-jack/
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