CannaSelection Strain Finder · Strain
sativa-dominant strainCritical Jack
Critical Jack is a sativa-dominant hybrid of Critical Plus and Jack Herer. The available source description highlights a sharp, distinctly citrusy aromatic lift, large spear-shaped colas, and fast, productive growth.
View all strainsCharacter profile
Aroma, effects and terpenes
Aromas
- sharp
Cannabinoid profile
Documented ranges
These values are intended for orientation. Actual levels may vary depending on the batch, phenotype and growing environment.
Genetics
Parentage and family tree
Critical Jack is shown at the beginning. The documented parent lines then follow through to the 4th generation.
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StrainCritical Jack
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ParentsCritical+
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GrandparentsCritical Bilbo
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3rd generationAfghani
- 4th generationAfghanistan
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3rd generationCritical Mass
- 4th generationAfghanistan
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3rd generationAfghani
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GrandparentsCritical Mass
- 3rd generationAfghanistan
- GrandparentsAfghanistan
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GrandparentsCritical Bilbo
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ParentsJack Herer
- GrandparentsHaze
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ParentsCritical+
Editorial profile
Critical Jack in detail
Origin & classification
Critical Jack brings together two well-known genetic lines: Critical Plus and Jack Herer. In the available description, the former represents the Critical side of the cross, while Jack Herer adds the sativa-influenced background. The result is explicitly described as a sativa-dominant hybrid. No breeder is documented in the dataset, so this origin should not be attributed to a specific seed bank or a single commercial version.
Aroma & taste
The brief but coherent source focuses on a few clearly identifiable characteristics. Regarding growth, it describes fast, productive development. The plants are said to form particularly large, spear-shaped colas. This shape description is more specific than a general statement about “good flowers”: it refers to elongated main flower clusters reminiscent of spearheads, which define the visible structure of the described selection.
Terpene profile
No precise information is available on flowering time, plant height, outdoor maturity or achievable yields. Fast growth therefore should not be used to infer a specific number of flowering days or guaranteed production. Information on moisture tolerance, training or suitability for particular climate zones is also missing. The profile deliberately remains open on these points instead of transferring characteristics from related Critical or Jack Herer cultivars.
Effect tendency
From a sensory perspective, Critical Jack is characterised by a sharp citrus note. The English expression “sharp citrus lift” suggests a pronounced, bright and rather zesty opening. Whether this refers to lemon, orange or another citrus fruit is not specified in more detail. No terpenes have been documented either. Assigning the profile to limonene would therefore be merely speculative despite the citrus description and does not belong in a reliable strain portrait.
Cannabinoids, flowering & appearance
The source gives a THC range of 15 to 21 percent. Such laboratory values can vary considerably between phenotypes and batches and do not describe a guaranteed potency for every plant. No specific effect profile has been documented; sativa dominance alone should not be taken to imply an energetic, creative or euphoric effect. Based on the dataset, Critical Jack should therefore be described primarily as a sativa-dominant combination of Critical Plus and Jack Herer with sharp citrus aromatics, fast productive development and notably large, spear-shaped colas. Further claims would go beyond the source material actually available.
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Log in & give feedback Only approved comments are shown publicly.Questions and answers
Frequently asked questions about Critical Jack
What type of strain is Critical Jack?
We list Critical Jack as a sativa-dominant strain with the parentage Critical Plus × Jack Herer.
What genetics are behind Critical Jack?
The parentage of Critical Jack is Critical Plus × Jack Herer.
What does Critical Jack smell and taste like?
Aromatically, Critical Jack is primarily characterised as citrusy and sharp. Depending on the batch and phenotype, the intensity may vary.
How high is the THC content of Critical Jack?
A THC range of 15–21 % is given for Critical Jack. Actual values may vary depending on the batch, phenotype and growing environment.
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