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.
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 400 seeds.
About Black Jack Feminised
The way to plan Black Jack is backwards from the day you intend to cut, with 500-600 g/m2 per square metre indoors and 500-700 g/plant per plant outdoors as the figures you are working toward, at 23% THC. Count 9 weeks back from that date and you have your flip date. This one does not dump its weight in a fortnight the way a short indica will; it adds through the whole bloom. Growers who panic about autumn rain and chop a fortnight early routinely hand back a fifth of the crop. Depending on your province the honest window runs from late March into May, and the pinene-led profile only arrives in the last fourteen days.
The Aromatic Three
Leading with Pinene, then Limonene, and Caryophyllene underneath.
Difficulty: medium. In flower for 9 weeks. Stands Medium. Indoors it returns 500-600 g/m2. Outdoors, 500-700 g/plant a plant.
Effects
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Black 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.
Black Jack runs through our F3 programme. Most of the pack expresses the target haze-character terps cleanly; the F3-to-F4 cycle is where we close out the last remaining off-types.
Stabilise Black Jack across three rounds toward F4 production-ready stock.
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.