Critical Jack Automatic by Dinafem
Critical Jack Automatic is an autoflowering cannabis strain from Dinafem, bred by crossing Critical Jack × Roadrunner Automatic. Indoors it typically finishes flowering in around 70 days from sprout. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Critical Jack Automatic grows against.
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Similar strains
| Breeder | Dinafem |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±70 days |
| Environment | Outdoors |
| Lineage | Critical Jack × Roadrunner Automatic |
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Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.
🧬 Explore the family: Critical Jack · Roadrunner Automatic
Ancestry Pedigree
Dinafem
Dinafem
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Original Strains
Original Strains
Sensi Seeds
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Dinafem
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Original Strains
The Seed Bank
Clone Only Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Original Strains
Growing Critical Jack Automatic: what to expect
Because Critical Jack Automatic 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 Critical Jack or Roadrunner Automatic 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.
Critical Jack Automatic FAQ
How long does Critical Jack Automatic take to flower?
Critical Jack Automatic typically flowers in around 70 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Critical Jack Automatic an indica or a sativa?
Critical Jack Automatic is listed as ruderalis/indica/sativa (autoflowering).
What are the parents of Critical Jack Automatic?
Critical Jack Automatic was bred from Critical Jack × Roadrunner Automatic by Dinafem.
What environment does Critical Jack Automatic 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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