BlackJack by Sativa Seedbank
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Bred by Sativa Seedbank from Black Domino × Jock Horror, BlackJack is a sativa-leaning cannabis variety. Indoors it typically finishes flowering in around 77 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real BlackJack grows against.
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Similar strains
| Breeder | Sativa Seedbank |
|---|---|
| Type | mostly sativa |
| Flowering time | ±77 days |
| Environment | Indoors |
| Lineage | Black Domino × Jock Horror |
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Growing BlackJack: what to expect
As a sativa-leaning plant, plan for a big stretch after the flip (often 100–200%) — flip earlier than feels natural and keep training options ready. Sativa-leaning plants also generally prefer a lighter feed than heavy indicas. Growers familiar with Black Domino or Jock Horror will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
BlackJack FAQ
How long does BlackJack take to flower?
BlackJack typically flowers in around 77 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is BlackJack an indica or a sativa?
BlackJack is listed as mostly sativa.
What are the parents of BlackJack?
BlackJack was bred from Black Domino × Jock Horror by Sativa Seedbank.
What environment does BlackJack like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
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