Sour Jack Feminised
Sour Jack Feminised: sativa cannabis seeds picked for South African conditions. 15% THC, with uplifted, 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 2026-09-21 on 450 seeds.
About Sour Jack Feminised
Days 1 to 14, seed to fourth node: Expect Sour 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 12: The 18/82 character becomes obvious here. Limonene usually shows in week three and strengthens from there, with trichome cover visible without a loupe from about week five. Indoor yield: 300g/m2. Height: Tall. Tested at 15% THC. Difficulty: medium.
The Aromatic Three
Leading with Limonene, then Pinene, and Terpinolene underneath.
Difficulty: medium. In flower for 9-12 weeks. Stands Tall. Indoors it returns 300g/m2. Outdoors, 500g/plant a plant.
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Sour Jack Feminised — 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.
A West Coast clone-only clone-only original brought to seed via a three-generation backcross programme. Vigour, terpene character and finished-flower potency are all locked. The pack runs true to the cut your mate grew off a clone last season.
Pin the finished-flower potency of the elite cut into the population.
Chosen for sativa vigour, bud-to-leaf ratio and the distinctive terpene character of the original cut.
Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.