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Critical Jack
Feminized
Critical Jack pairs Critical’s production with Jack Herer’s cerebral lift. You get an uplifting, focused high with light body relaxation. The plant stretches in early flower and rewards training with dense colas. Expect 8 to 9 weeks to finish indoors. MasterSeeds supplies feminized seeds for growers who want predictable phenotypes.
- Uplifting, Productive, Fast
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STRAIN PROFILE
Complete Cannabis Strain Specifications
| Trait | Value |
|---|---|
| Type | Sativa-dominant hybrid |
| THC | 18-22% |
| CBD | 0.5-1.5% |
| Grow Difficulty | Intermediate |
| Flowering Time | 8-9 |
| Yield | High (500-600 g/meter² indoor; 400-700 g/plant outdoor) |
| Height | Medium-tall (100-180 cm) |
| Environment | Indoor and outdoor |
| Effects | Uplifting, Focused, Relaxed |
| Flavors | Citrus, Pine, Earthy spice |
| Genetics | Critical x Jack Herer |
| Climate | Temperate to Mediterranean |
Critical Jack Strain Information and Characteristics
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Strain Type:
Critical Jack is a sativa-dominant hybrid. It blends the heavy yield of Critical with the uplift of Jack Herer.
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THC Content:
THC sits around 18 to 22 percent in most phenotypes. This level delivers an energetic, focused high suited to daytime use.
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CBD Content:
CBD is low, typically under 1.5 percent. Patients report relief from mild pain and stress with low doses.
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Grow Difficulty:
Grow difficulty rates as intermediate. You need steady feeding and basic training to reach full yields.
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Flowering Time:
Flowering time runs 8 to 9 weeks indoors. Outdoor harvest comes late September in temperate zones.
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Expected Yield:
Yield rates are high under proper care. Indoor growers report 500 to 600 grams per square metre while outdoor plants reach 400 to 700 grams per plant.
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Plant Height:
Plants grow medium to tall, often 100 to 180 centimetres. You should expect a noticeable stretch during early flowering.
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Growing Environment:
Critical Jack suits both indoor and outdoor grows. It handles short frosts but prefers warm, sunny sites.
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Expected Effects:
Effects lean uplifting and focused, with light body relaxation. Many users in Canada choose it for daytime social use.
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Genetic Lineage:
Genetics pair Critical with Jack Herer for yield and lift. Breeders balanced aroma and growth traits in the cross.
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Seed Type:
These seeds are sold as feminized for stable female plants. MasterSeeds offers them to growers seeking reliable phenotypes.
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Preferred Climate:
Best climate is temperate to Mediterranean with consistent sun. In cooler Canadian regions, finish plants indoors or under protective covers.
Frequently Ask Questions
Everything you need to know about this strain.
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Questions & Answers
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Q: My plants stretch too much. What do I do?
A: Adjust light distance and use a stable light schedule to limit stretch. Apply topping and set up a SCROG to level the canopy.
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Q: Leaves show nutrient burn. How do I fix it?
A: Flush medium with pH balanced water for two feed cycles. Then reduce nutrient strength by 25 percent and monitor leaf recovery.
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Q: What soil mix works best?
A: Use a light, airy mix with perlite and compost for good drainage. Keep pH between 6.0 and 6.5 for optimal uptake.
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Q: How do I boost resin production?
A: Introduce a finishing PK and lower humidity to 40 to 45 percent in the final two weeks. Keep night temps slightly cooler than day temps.
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Q: Should I grow this outdoors in Canada?
A: Yes in southern Canadian regions with warm summers. Move plants under cover if early frost appears.
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