Jack Hammer by Victory Seeds
Jack Hammer lands on the sativa-leaning side of the spectrum, Victory Seeds's take on the Jack Herer line. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. Reported THC is 20% with CBD at 0.95%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Jack Hammer grows against.
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Similar strains
| Breeder | Victory Seeds |
|---|---|
| Type | mostly sativa |
| Flowering time | ±63 days |
| THC | 20% |
| CBD | 0.95% |
| Environment | Outdoors, Greenhouse |
| Lineage | Jack Herer |
| Descendants | Blue Hammer, Motarebel - Sativa Queen, Auto Jack Hammer |
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🧬 Explore the family: Jack Herer · Blue Hammer · Motarebel - Sativa Queen · Auto Jack Hammer
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Growing Jack Hammer: 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 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 Hammer FAQ
How long does Jack Hammer take to flower?
Jack Hammer 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 Hammer an indica or a sativa?
Jack Hammer is listed as mostly sativa.
What are the parents of Jack Hammer?
Jack Hammer was bred from Jack Herer by Victory Seeds.
How strong is Jack Hammer?
Reported THC for Jack Hammer is 20% and CBD 0.95%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Jack Hammer 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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