A sativa-dominant hybrid bred from Sour Diesel and Jack Herer. It focuses on energy and clarity.

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Sour Jack Feminized Seeds

Q: How long does Sour Jack take to flower?

Flowering runs 8 to 9 weeks indoors. Outdoor harvest typically falls late September to early October in the northern hemisphere.

Q: What yield should I expect?

Expect 450 to 550 g/m2 indoors with proper light and training. Outdoors expect 400 to 600 g per plant in full sun.

Q: What training works best?

Low stress training early and topping at 3 to 5 nodes. Add SCROG or LST to control stretch and increase colas.

Q: What nutrients suit Sour Jack?

Standard three-part feeding works. Lean slightly during early flower, increase phosphorus and potassium weeks 3 to 6 of bloom.

Q: How do I manage stretch?

Flip to flower after 4 to 6 weeks veg for manageable stretch. Use ties and nets to hold branches down.

Q: When is the best harvest window?

Harvest when trichomes show mostly cloudy with some amber for a balanced energetic high with light body effect.

Q: How should I cure Sour Jack buds?

Dry slowly at 10 to 15 C and 50 to 60 percent RH for 7 to 10 days. Cure in jars, burping daily for two weeks then weekly for a month.

Q: What pests to watch for?

Watch spider mites and powdery mildew. Keep humidity low during late flower and inspect leaves weekly.

Q: Is Sour Jack good for daytime use?

Yes. Expect energetic, focused effects that suit tasks and social activity during the day.

Sour Jack Feminized Seeds by Captain Seeds - Sour Jack is a sativa-dominant hybrid combining Sour Diesel and Jack Herer for diesel flavor and energetic daytime effects.

Daytime energy
Diesel citrus flavor
Short flowering sativa

Sour Jack blends Sour Diesel and Jack Herer genetics to deliver a diesel-forward terpene profile with citrus and pine highlights. It favors growers who train plants to control stretch. Expect an 8 to 9 week indoor bloom and medium-high yields with proper light and nutrient management. Use low stress training and topping to boost colas. Harvest at mostly cloudy trichomes for a clear-headed, energetic result. Cure slowly to preserve aroma and smoothness.

Sour Jack Feminized Seeds Quick Facts

All the essential strain details at a glance for growers and users.

Property	Value	Description
Type	Sativa-dominant hybrid	Sour Jack is a sativa-dominant hybrid with an energetic lean.
THC Content	18-22%	THC typically ranges between 18 and 22 percent.
CBD Content	0.1-0.5%	CBD remains low, usually 0.1 to 0.5 percent.
Grow Difficulty	Intermediate	Grow difficulty is intermediate. Expect routine training and steady nutrient work.
Flowering Time	8-9	Flowering takes 8 to 9 weeks indoors.
Yield	Medium-High (450-550 g/m2 indoor; 400-600 g/plant outdoor)	Indoor yield hits about 450 to 550 grams per square meter. Outdoor plants produce roughly 400 to 600 grams per plant.
Height	Medium to tall (80-160 cm)	Plants reach 80 to 160 centimeters when allowed full stretch.
Environment	Indoor and outdoor	Suits indoor and outdoor grows. Train heavily indoors to control stretch and increase bud sites.
Effects	Energetic, Uplifting, Focused	Effects run energetic, uplifting, and focused, suited for daytime tasks.
Flavor Profile	Diesel, Citrus, Pine	Flavor profile blends diesel fuel notes with bright citrus and a pine finish.
Genetics	Sour Diesel x Jack Herer	Genetics come from Sour Diesel x Jack Herer, which explains the diesel aroma and clear-headed high.
Climate	Mediterranean	Performs best in warm, Mediterranean climates with low humidity during late flower.

Frequently Asked Questions

Answers to Common Questions About Growing Sour Jack Cannabis Seeds

What is Sour Jack?

How long does Sour Jack take to flower?

What yield should I expect?

What training works best?

What nutrients suit Sour Jack?

How do I manage stretch?

When is the best harvest window?

How should I cure Sour Jack buds?

What pests to watch for?

Is Sour Jack good for daytime use?

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Q: My Sour Jack is stretching too much after flip. What do I do?

A: Add a net and tie branches down. Reduce final vegetative time next run and top earlier at 3 nodes.