Emerald Jack by Emerald Triangle
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Emerald Jack, from breeder Emerald Triangle, is a sativa-leaning strain descended from Jack Herer × Unknown Strain. 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 Emerald Jack grows against.
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Similar strains
| Breeder | Emerald Triangle |
|---|---|
| Type | mostly sativa |
| Flowering time | ±67 days |
| Environment | Outdoors |
| Lineage | Jack Herer × Unknown Strain |
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Growing Emerald 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 Jack Herer or Unknown Strain 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.
Emerald Jack FAQ
How long does Emerald Jack take to flower?
Emerald 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 Emerald Jack an indica or a sativa?
Emerald Jack is listed as mostly sativa.
What are the parents of Emerald Jack?
Emerald Jack was bred from Jack Herer × Unknown Strain by Emerald Triangle.
What environment does Emerald 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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Facts compiled from public breeder listings. Growing Emerald Jack? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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