Critical Jack
- THC 20%
- CBD 0.5%
- Flowering Time From 56 to 63 days
- Yield 625 g/m²
Genetics: Critical+ x Jack Herer
FLAVORS
EFFECTS
Critical Jack: family tree
- Parents
- Critical × Jack Herer
- Grandparents
- Afghani Skunk #1 Haze Northern Lights Shiva Skunk
- Landrace roots
- Afghani Acapulco Gold Colombian Gold Thai
Other sources say (4)
- Critical Plus × Jack Herer Beaver Seeds, Crop King Seeds, I Love Growing Marijuana
- Critical 2.0 × Haze Blimburn
- Critical 2.0 × Haze 2.0 Silent Seeds
- Critical Mass × Jack Herer WeedSeedsExpress
Lineage as declared by the seedbanks: sometimes they disagree.
Price Comparison Table — Critical Jack
| Vendor | 3 Seeds | 5 Seeds | 10 Seeds |
|---|---|---|---|
Mr Hanf
Best price
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|
€34.75 €6.95 / seed | €71.30 €7.13 / seed |
Cannoptikum
|
€21.78 €7.26 / seed | €35.04 €7.01 / seed | €71.02 €7.10 / seed |
Zamnesia
|
€23.00 €7.67 / seed |
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|
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|
Price history
One line per shop, in the colour of its logo. Each step is a price change we recorded since 20/10/2026. Prices in euro.
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Zamnesia -
Cannoptikum
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Cannoptikum -
Mr Hanf
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Cannoptikum -
Mr Hanf
Description from Silent Seeds
Critical Jack Feminized
Critical Jack feminized by Silent Seeds is a hybrid resulting from crossing Critical+ with the renowned Jack Herer. This highly productive Sativa-dominant strain flowers in about 60 days and boasts a potency level surpassing that of its predecessors. Composed of 60% Sativa and 40% Indica, it's tailored for cannabis connoisseurs seeking a top-tier hybrid.
Critical Jack delivers impressive yields, outperforming its Critical parent in both growth vigor and productivity. As it matures into a towering plant reaching up to 3 meters, it produces large, compact buds rich in resin. Outdoor cultivators can expect yields as high as 1200g per plant, while indoor growers can achieve up to 625g/m² of premium cannabis by late September to mid-October.
Resilient and easy to cultivate, Critical Jack is well-suited for growers of all experience levels. It shows strong resistance to mold and pests, making it a reliable choice for both indoor and outdoor environments.
The flavor and aroma of Critical Jack are bold and complex, featuring notes of citrus, incense, exotic wood, and a range of spices. Its smooth smoke delivers an uplifting, cerebral high that lingers and appeals to fans of psychedelic cannabis. For those who prefer not to manage light schedules, the Autoflowering version of Critical Jack is also available.
Terpenes: Myrcene, Limonene
Suitable for: Indoor, Outdoor
Grow difficulty: Easy
Parents: Critical+ x Jack Herer
Genetics: 40% Indica / 60% Sativa
THC: 20%
CBD: 0-1%
Flowering Type: Photoperiod
Sex: Feminized
Flowering Time: 8-9 weeks
Height (Indoor): Medium
Height (Outdoor): 300cm
Yield (Indoor): High
Yield (Outdoor): 1000+ gr/plant
Available as: Feminized seeds
Resilience: Mold resistant, Pest resistant
Taste / Aroma: Citrus, Spicy, Woody
Effects: Uplifting, Cerebral, Long-lasting, Psychedelic
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