Jack the Ripper by TGA Subcool
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Growers reach for Jack the Ripper as a sativa-leaning option, a cross of Jacks Cleaner × Space Queen out of TGA Subcool. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. Reported THC is 18.80% with CBD at 0.16%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Jack the Ripper grows against.
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Similar strains
| Breeder | TGA Subcool |
|---|---|
| Type | mostly sativa |
| Flowering time | ±63 days |
| THC | 18.80% |
| CBD | 0.16% |
| Environment | Outdoors |
| Lineage | Jacks Cleaner × Space Queen |
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🧬 Explore the family: Jacks Cleaner · Space Queen
Ancestry Pedigree
TGA Subcool Seeds
Original Strains
Original Strains
Sensi Seeds
The Seed Bank
The Seed Bank
The Seed Bank
The Seed Bank
Cultivators Choice
Original Strains
Original Strains
Original Strains
Cultivators Choice
Unknown or Legendary
BC Growers Association
Unknown or Legendary
Original Strains
Brothers Grimm
Unknown or Legendary
Sensi Seeds
Original Strains
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
Growing Jack the Ripper: 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 Jacks Cleaner or Space Queen 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 the Ripper FAQ
How long does Jack the Ripper take to flower?
Jack the Ripper 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 Jack the Ripper an indica or a sativa?
Jack the Ripper is listed as mostly sativa.
What are the parents of Jack the Ripper?
Jack the Ripper was bred from Jacks Cleaner × Space Queen by TGA Subcool.
How strong is Jack the Ripper?
Reported THC for Jack the Ripper is 18.80% and CBD 0.16%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Jack the Ripper 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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