Critical Jack autoflower cannabis flower
HybridAuto
THC 20%
Autoflower
HybridAutoflowerIn Stock

Critical Jack Auto

Well-balanced hybrid autoflower with focused and relaxed effects and balanced hybrid structure. Ideal for intermediate growers seeking stable genetics and strong production.

Flavor:Sweet dough, fruity candy, pine

Best for:🌞Daytime🌤️DepressionFatigue
Intermediate Grower
🧬
THC
20%
Flower
70-80 days seed to harvest
⚖️
Yield
Typical for type
🎯
Difficulty
Intermediate
📏
Height
Short
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Stick to low-stress training, autos recover slowly

Select Pack Size
$13.49USD

Premium genetics

Generates typical for type production in both indoor and outdoor setups
Hits with clean focused effects that shine during daytime
Hybrid-dominant genetics with stable, consistent phenotype

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Reliable performer for home cultivators
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About Critical Jack Auto

In a market saturated with hybrid genetics at the 20% THC range, Critical Jack distinguishes itself through its limonene/caryophyllene terpene combination and its genuine versatility, this is not just a hybrid by label, it expresses balanced characteristics that make it adaptable to different use scenarios. Compared to similar genetics in our catalog, Critical Jack trades raw potency for terpene complexity, which makes the flower more interesting to experienced users who have moved past judging quality by THC percentage alone.

How It Grows Compared to Similar Genetics

In the grow room, Critical Jack sits in the practical middle ground that hybrid growers appreciate. Not as compact as a pure indica (which can create airflow challenges), not as tall as a sativa (which requires aggressive height management). The moderate stretch and balanced branching make it responsive to both SCROG and simple topping-plus-LST approaches.

Flowering: 70-80 days seed to harvest. Yield: 25-100 g/plant indoor / 100-230 g/plant outdoor. Height: Up to 140 cm. Difficulty: intermediate. Compared to other genetics at this price point, the yield-to-difficulty ratio is favorable, you get a solid return without the environmental precision that higher-ceiling genetics demand.

Effects and Use

At 20% THC, Critical Jack delivers focused, relaxed, uplifted effects with a limonene-influenced character. The onset is balanced, head and body arrive together and remain proportional throughout a 2-3 hour duration. This makes the strain adaptable to different situations depending on dose. The limonene dominance keeps the mental space bright and slightly elevated even when the body relaxes.

Terpene Profile

Dominant terpenes: Limonene (primary), Caryophyllene (secondary), Linalool (tertiary). This combination produces an aroma profile that is immediately identifiable when the jar opens and translates well to both vaporization (best at 360-385°F) and combustion, though lower temperatures preserve the caryophyllene top notes that combustion destroys.

Who Should Grow Critical Jack

Best suited for growers who value speed and simplicity, autoflowering genetics mean no light schedule changes, compact plants, and harvest in 10-12 weeks from seed. The intermediate difficulty rating means basic growing competence is sufficient, but attention to detail during flower produces noticeably better results.

Effects

🧠Focused
76% of people reported feeling Focused
😌Relaxed
65% of people reported feeling Relaxed
😎Uplifted
58% of people reported feeling Uplifted
😊Happy
51% of people reported feeling Happy
🤩Creative
50% of people reported feeling Creative
🤗Euphoric
40% of people reported feeling Euphoric
🤤Hungry
34% of people reported feeling Hungry
😴Sleepy
31% of people reported feeling Sleepy
😆Giggly
24% of people reported feeling Giggly

Best For

Daytime
Depression
Fatigue
Stress

Strain Type

Indica 50%Sativa 50%

Strain Data Sheet

🧬THC20% - 25% (High)
🌿LineageCritical Plus × Jack Herer
🔬TypeAutoflower Hybrid
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏HeightUp to 140 cm
⚖️YieldTypical for type
🏠Yield Indoor25-100 g/plant
🌳Yield Outdoor100-230 g/plant
Flowering Time70-80 days seed to harvest

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
Seeds
Premium US Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Laws governing cannabis seeds, germination, and cultivation vary by jurisdiction and may change. Customers are responsible for reviewing applicable federal, state, and local requirements before ordering or germinating seeds. This information is not legal advice.
1
Critical Jack Auto
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number
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Critical Jack Strain Review

Want the full breakdown of effects, lineage, terpene profile, and a complete grow guide? Read our in-depth Critical Jack strain review.

Critical Jack Auto, Cannabinoid & Terpene Reference

Reference ranges aggregated from breeder documentation and catalog specifications. Total THC reported as max-potential (THC + 0.877 × THCA). Individual seed-lot expression may vary by 1-3 percent.

Total THC
20.4%
CBD
0.08%
Top Terpenes
Caryophyllene, Limonene, Myrcene

Critical Jack Auto, Aggregated Grower Yield Reports

Yield ranges aggregated from public grower journals, breeder-documented spec sheets, and cultivation community reports on Critical Jack Auto autoflower seeds. First-time growers should expect 70-85 percent of these numbers.

SetupYield
Outdoor, greenhouse, supplemental light344g
Outdoor, balcony, 5-gal fabric pot344g

Critical Jack Auto, Sourcing & Genetics

Release Era
Modern stabilized line
Parent Genetics
Critical Plus × Jack Herer
Lineage Notes
Critical Jack was bred by Dinafem in Spain by crossing their Critical + (Critical Plus) with a Jack Herer, producing a high-yielding, resin-heavy sativa-dominant hybrid. The lineage is confirmed by CannaConnection and Strainpedia.
Recommended US Climate
Versatile across all US climates, 8-10 week cycle works in any growing window from Maine to Hawaii.

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