Colombian Jack by Kannabia
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Colombian Jack is a sativa-leaning cannabis strain from Kannabia, bred by crossing Black Jack × Nebula. Indoors it typically finishes flowering in around 67 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Colombian Jack grows against.
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Similar strains
| Breeder | Kannabia |
|---|---|
| Type | mostly sativa |
| Flowering time | ±67 days |
| Environment | Outdoors |
| Lineage | Black Jack × Nebula |
| Descendants | Tropical Treat Special |
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🧬 Explore the family: Black Jack · Nebula · Tropical Treat Special
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Growing Colombian Jack: 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 Jack or Nebula 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.
Colombian Jack FAQ
How long does Colombian Jack take to flower?
Colombian Jack typically flowers in around 67 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Colombian Jack an indica or a sativa?
Colombian Jack is listed as mostly sativa.
What are the parents of Colombian Jack?
Colombian Jack was bred from Black Jack × Nebula by Kannabia.
What environment does Colombian Jack 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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