Big Jack by GreenLabel Seeds
2 other breeders' versions of Big Jack — compare flowering times side by side →
A sativa-leaning cross of Big Bud × Jack Herer, Big Jack — released by GreenLabel Seeds — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Big Jack grows against.
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Similar strains
| Breeder | GreenLabel Seeds |
|---|---|
| Type | mostly sativa |
| Flowering time | ±63 days |
| Environment | Outdoors |
| Lineage | Big Bud × Jack Herer |
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Growing Big 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 Big Bud or Jack Herer 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.
Big Jack FAQ
How long does Big Jack take to flower?
Big Jack typically flowers in around 63 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Big Jack an indica or a sativa?
Big Jack is listed as mostly sativa.
What are the parents of Big Jack?
Big Jack was bred from Big Bud × Jack Herer by GreenLabel Seeds.
What environment does Big 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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