Claustrum by Positronics
Claustrum is a sativa-leaning cannabis strain from Positronics, bred by crossing Kali Mist × Jack Herer. Indoors it typically finishes flowering in around 80 days after the flip to 12/12. Reported THC is 21% with CBD at 0.1%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Claustrum grows against.
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Similar strains
| Breeder | Positronics |
|---|---|
| Type | mostly sativa |
| Flowering time | ±80 days |
| THC | 21% |
| CBD | 0.1% |
| Environment | Outdoors |
| Lineage | Kali Mist × Jack Herer |
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Growing Claustrum: 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 Kali Mist or 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.
Claustrum FAQ
How long does Claustrum take to flower?
Claustrum typically flowers in around 80 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Claustrum an indica or a sativa?
Claustrum is listed as mostly sativa.
What are the parents of Claustrum?
Claustrum was bred from Kali Mist × Jack Herer by Positronics.
How strong is Claustrum?
Reported THC for Claustrum is 21% and CBD 0.1%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Claustrum 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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