Double Jack Auto by Canadian Seed Lab
A autoflowering cross of Double Jack × CSL Ruderalis, Double Jack Auto — released by Canadian Seed Lab — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 60 days from sprout. Reported THC is 19% with CBD at 0.77%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Double Jack Auto grows against.
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Similar strains
| Breeder | Canadian Seed Lab |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±60 days |
| THC | 19% |
| CBD | 0.77% |
| Environment | Outdoors |
| Lineage | Double Jack × CSL Ruderalis |
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Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.
🧬 Explore the family: Double Jack · CSL Ruderalis
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Growing Double Jack Auto: what to expect
Because Double Jack Auto 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 Double Jack or CSL 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.
Double Jack Auto FAQ
How long does Double Jack Auto take to flower?
Double Jack Auto typically flowers in around 60 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Double Jack Auto an indica or a sativa?
Double Jack Auto is listed as ruderalis/indica/sativa (autoflowering).
What are the parents of Double Jack Auto?
Double Jack Auto was bred from Double Jack × CSL Ruderalis by Canadian Seed Lab.
How strong is Double Jack Auto?
Reported THC for Double Jack Auto is 19% and CBD 0.77%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Double Jack Auto 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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