THC
12.8–20.2%
Middle half of 17 lab tests · median 15.05%
CBD
0.3%
Middle half of 12 lab tests · median 0.11%
Genetics Split
Critical Jack is a 60% sativa hybrid with Critical x Jack Herer lineage, flowering in 8-9 weeks and offering energetic, focused, and creative effects.
Lab-Tested Profile
Measured in 17 flower lab tests of samples sold as Critical Jack by Analytical360, SC Labs, 2012–2017. Bar = middle half of results, tick = median.
Terpenes by weight · total 1.9% median
Lab results reflect the samples submitted under this name; batches, growers and phenotypes vary.
Effects
As reported by our data sources, most-cited first.
Terpene Profile
Relative levels from lab and source data.
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Terpene Fingerprint
Relative terpene levels from lab and source data
THC in this profile
20.2% THC
Growing Information
Flowering Time
8–9 weeks
Difficulty
moderate
Height (Indoor)
80-160cm
Height (Outdoor)
150-200cm
Yield (Indoor)
500-600 g/m²
Yield (Outdoor)
800-1000 g/plant
About Critical Jack
Critical Jack, a hybrid strain with 60% sativa genetics, offers a complex profile for growers and consumers alike. Its lineage combines Critical with Jack Herer, resulting in a plant that typically flowers in 8-9 weeks. This moderate difficulty strain can reach indoor heights of 80-160cm, producing a generous yield of 500-600 g/m². Outdoors, it grows taller, between 150-200cm, and can yield 800-1000 g/plant. Users report a balanced experience, feeling Energetic, Calming, Focused, Relaxed, and Creative. The flavor profile is a delightful mix of Sweet, Fruity, Citrus, and Pine notes, with primary terpenes including Caryophyllene, Humulene, and Linalool. The version offered by Silent Seeds typically shows THC content ranging from 14.59-15%.
Where to Buy Seeds
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Frequently Asked Questions about Critical Jack
Is Critical Jack an Indica, Sativa, or Hybrid?
Critical Jack is classified as a hybrid cannabis strain bred from a genetic cross of Critical × Jack Herer.
What cannabinoid content is reported for Critical Jack?
Critical Jack: 15.1% THC and 0.3% CBD reported in our data. The THC figure is a lab-test median. Potency can vary across harvests, phenotypes, and growing conditions.
What are the common effects of Critical Jack?
Our data sources report these effects for Critical Jack: calm, creative, focused, relaxed. Individual experiences vary.
What does Critical Jack taste and smell like?
Our data sources list flavors of citrus, fruity, pepper and terpenes such as Bisabolol, Camphene, Caryophyllene for Critical Jack.
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Shared reported terpene or flavor notes; effects may differ
