Critical Jack
8 listings from 6 seed banksBred by Dr. Seedsprices checked Nov 5
- THC
- 19%
- Flowering
- 63–70 days
- 30-day price
- no change
Offers for Critical Jack
“est.” adds a typical $11.00 shipping cost when the bank does not publish a rate. Some links are affiliate links. How prices and rankings work
Price history: 30 observed days, 2026-10-07 to 2026-11-05 (UTC). Lowest recorded: $5.10/seed, before shipping and coupon codes. Gaps mean no in-stock price was recorded.
Genetics
The family tree for this strain is still being assembled from breeder records across seed banks.
Grow specs
- Height
- Tall
- Difficulty
- Easy (fine for a first grow)
- Grows
- Indoors or out
Reported in catalog and seed-bank records; not independently tested.
Harvest timing
Harvest 63–70 days after the flip to 12/12.
From seed with a 6-week veg, about 15–16 weeks. Autoflower versions run on their own clock, usually 10 to 12 weeks from seed.
Plan a Critical Jack grow in the harvest calculator →Data & sources
Growing details and parentage reflect catalog and seed-bank records. They are not independent grow tests or lab results. How we use these records.
Seed-bank records (9)
- Crop King Seeds: Critical Jack Feminized Marijuana Seeds
- Dr Seeds: Critical Jack Autoflowering Seeds
- Dr Seeds: Critical Jack Feminized Seeds
- Homegrown Cannabis Co.: Critical Jack Feminized
- ILGM: Critical Jack Seeds
- Quebec Cannabis Seeds: Jack's Critical Autoflower Feminized Cannabis Seeds
- SeedSupreme: Critical Jack Autoflower Cannabis Seeds
- SeedSupreme: Critical Jack Feminized Seeds
- Dr Seeds: Critical Jack Autoflowering Seeds · historical listing
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Also sold as Jack's Critical