Jack Smack by Ustad Seeds
Jack Smack is a sativa-leaning cannabis strain from Ustad Seeds, bred by crossing Jack Herer × Herijuana. Indoors it typically finishes flowering in around 70 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Jack Smack grows against.
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Similar strains
| Breeder | Ustad Seeds |
|---|---|
| Type | mostly sativa |
| Flowering time | ±70 days |
| Environment | Outdoors |
| Lineage | Jack Herer × Herijuana |
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Growing Jack Smack: 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 Jack Herer or Herijuana 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.
Jack Smack FAQ
How long does Jack Smack take to flower?
Jack Smack typically flowers in around 70 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Jack Smack an indica or a sativa?
Jack Smack is listed as mostly sativa.
What are the parents of Jack Smack?
Jack Smack was bred from Jack Herer × Herijuana by Ustad Seeds.
What environment does Jack Smack 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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Facts compiled from public breeder listings. Growing Jack Smack? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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