Black Jack Auto
Black Jack Auto: sativa cannabis seeds picked for South African conditions. 23% THC, with euphoric, focused, energetic the effects most often reported. Posted discreetly countrywide.
Royal King Genetics — Seed-Lot Testing
Figures below come from our own seed-lot testing rather than breeder marketing, taken from a single batch tested 2026-09-11 on 200 seeds.
About Black Jack Auto
Days 1 to 14, seed to fourth node: Expect Black Jack to crack in roughly 48 hours on damp paper towel and to break soil by day three. Early growth runs upward quickly, narrow first leaves already reaching. Look for five nodes by day 14 with obvious gaps between them, which is the sativa pattern showing early. Damping off is rare if you hold near 70% humidity through this stage.
Weeks 3 to 6, building the frame: This is the point where it tries to get away from you. Start low-stress training in week three, bend the main stem over at 90 degrees in week four, and the secondaries will draw level for a flat canopy by week six without topping at all.
Bloom, weeks 1 to 9: The 20/80 character becomes obvious here. Pinene usually shows in week three and strengthens from there, with trichome cover visible without a loupe from about week five. Indoor yield: 400-550 g/m2. Height: 40-110 cm. Tested at 23% THC. Difficulty: easy.
The Aromatic Three
Leading with Pinene, then Limonene, and Caryophyllene underneath.
Difficulty: easy. In flower for 9 weeks from germination. Stands 40-110 cm. Indoors it returns 400-550 g/m2. Outdoors, 40-250 g/plant a plant.
Effects
Reach For It When
Strain Type
At a Glance
In the Packet
Regular
Seeds
the source
inside
number
Related Strains
Black Jack Feminised
A sativa testing at 23% THC, Black Jack Feminised is reported euphoric, focused, energetic. Grown right across the country, from the Cape to the Lowveld. Discreet nationwide delivery and a germination guarantee.
Kahuna Auto
Buy Kahuna Auto seeds in South Africa. Sativa · 20% THC · euphoric, creative, calm. Every figure on this page is sourced, and every order ships unbranded.
Super Jack Auto
Super Jack Auto: hybrid cannabis seeds picked for South African conditions. 26% THC, with creative, focused, energetic the effects most often reported. Posted discreetly countrywide.
Cinderella 99 Feminised
Buy Cinderella 99 Feminised seeds in South Africa. Sativa · 22% THC · euphoric, sleepy, energetic. Every figure on this page is sourced, and every order ships unbranded.
Black Jack Auto — Breeder Information
Royal King GeneticsRecreated and stabilised by Royal King Genetics, the breeding team behind this catalogue. Seed lots are germination-tested before they ship. More on the breeding process and about page.
Black Jack is our F5 autoflower line. Five rounds of selection have fixed both the autoflower trigger and the high-energy terpene expression the cultivar is known for. The recessive ruderalis trait demands this depth of work to express uniformly.
Lock the autoflower trait in Black Jack through five generations of selection.
Chosen for vigour, manageable stretch and the cerebral terpene profile sativa growers buy this strain for.
Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.