Galactic Jack by Sin City Seeds
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Galactic Jack lands on the indica-leaning side of the spectrum, Sin City Seeds's take on the Alien Dog V2 × Sour Jack line. Indoors it typically finishes flowering in around 69 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Galactic Jack grows against.
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Similar strains
| Breeder | Sin City Seeds |
|---|---|
| Type | 70% Sativa / 30% Indica |
| Flowering time | ±69 days |
| Environment | Outdoors |
| Lineage | Alien Dog V2 × Sour Jack |
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🧬 Explore the family: Alien Dog V2 · Sour Jack
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Sensi Seeds
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The Seed Bank
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Unknown or Legendary
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Growing Galactic 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 Alien Dog V2 or Sour Jack 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.
Galactic Jack FAQ
How long does Galactic Jack take to flower?
Galactic Jack typically flowers in around 69 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Galactic Jack an indica or a sativa?
Galactic Jack is listed as 70% Sativa / 30% Indica.
What are the parents of Galactic Jack?
Galactic Jack was bred from Alien Dog V2 × Sour Jack by Sin City Seeds.
What environment does Galactic 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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