Old Jack by Projects Seeds
Bred by Projects Seeds from Jack Herer, Old Jack is a sativa-leaning cannabis variety. Indoors it typically finishes flowering in around 61 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Old Jack grows against.
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Similar strains
| Breeder | Projects Seeds |
|---|---|
| Type | mostly sativa |
| Flowering time | ±61 days |
| Environment | Outdoors |
| Lineage | Jack Herer |
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Growing Old 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 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.
Old Jack FAQ
How long does Old Jack take to flower?
Old Jack typically flowers in around 61 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Old Jack an indica or a sativa?
Old Jack is listed as mostly sativa.
What are the parents of Old Jack?
Old Jack was bred from Jack Herer by Projects Seeds.
What environment does Old 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 Old Jack? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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