Emerald Jack by Geistgrow
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Emerald Jack, from breeder Geistgrow, is an indica-leaning strain descended from Jack Herer × Nepal Indica. Indoors it typically finishes flowering in around 60 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 | Geistgrow |
|---|---|
| Type | mostly indica |
| Flowering time | ±60 days |
| Environment | Outdoors |
| Lineage | Jack Herer × Nepal Indica |
| Descendants | Emerald Jack x SCBDx, OG Critical |
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🧬 Explore the family: Jack Herer · Nepal Indica · Emerald Jack x SCBDx · OG Critical
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Growing Emerald Jack: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with Jack Herer or Nepal Indica 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 60 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 indica.
What are the parents of Emerald Jack?
Emerald Jack was bred from Jack Herer × Nepal Indica by Geistgrow.
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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