Auto Jack Horrendus by Jah Seeds
A autoflowering cross of Jack Herer × Ruderalis, Auto Jack Horrendus — released by Jah Seeds — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 65 days from sprout. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Auto Jack Horrendus grows against.
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Similar strains
| Breeder | Jah Seeds |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±65 days |
| Environment | Outdoors |
| Lineage | Jack Herer × Ruderalis |
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Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.
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Growing Auto Jack Horrendus: what to expect
Because Auto Jack Horrendus is an autoflower it runs on age, not photoperiod: keep it under 18–20 hours of light from sprout to harvest, start in its final pot, and go easy on training after week 3 — autos never pause to recover. Growers familiar with Jack Herer or Ruderalis 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.
Auto Jack Horrendus FAQ
How long does Auto Jack Horrendus take to flower?
Auto Jack Horrendus typically flowers in around 65 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Auto Jack Horrendus an indica or a sativa?
Auto Jack Horrendus is listed as ruderalis/indica/sativa (autoflowering).
What are the parents of Auto Jack Horrendus?
Auto Jack Horrendus was bred from Jack Herer × Ruderalis by Jah Seeds.
What environment does Auto Jack Horrendus 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 Auto Jack Horrendus? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
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