Jack Plant by Advanced Seeds
A sativa-leaning cross of Jack Herer, Jack Plant — released by Advanced Seeds — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 65 days after the flip to 12/12. Reported THC is 20%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Jack Plant grows against.
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Similar strains
| Breeder | Advanced Seeds |
|---|---|
| Type | mostly sativa |
| Flowering time | ±65 days |
| THC | 20% |
| Environment | Outdoors |
| Lineage | Jack Herer |
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Growing Jack Plant: 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 Plant FAQ
How long does Jack Plant take to flower?
Jack Plant typically flowers in around 65 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Jack Plant an indica or a sativa?
Jack Plant is listed as mostly sativa.
What are the parents of Jack Plant?
Jack Plant was bred from Jack Herer by Advanced Seeds.
How strong is Jack Plant?
Reported THC for Jack Plant is 20%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Jack Plant 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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