Jack Hair Feminized Seeds – Bulk Seed Bank · High Yield Sativa Hybrid

Jack Hair feminized seeds by Bulk Seed Bank offer the ultimate revival of a legendary cannabis classic, delivering explosive yields and an unforgettable cerebral high in just 8 weeks of flowering.

Are you tired of modern hybrids that lack the soul, yield, and distinctive flavor of old-school legends? Spending months nurturing plants only to end up with airy buds and a muted, disappointing aroma can be incredibly frustrating for any passionate grower. Jack Hair is the definitive solution to this problem, combining the vigorous genetics of Haze Hybrid, Northern Lights #5, and Shiva Skunk to guarantee dense, trichome-loaded buds with that unmistakable citrus and incense punch.

What Jack Hair does for your cannabis garden

This slightly Sativa-dominant hybrid (55%) provides a fast, robust, and highly productive cultivation experience, rewarding you with premium-quality, resin-drenched flowers. It perfectly balances an uplifting, cerebral euphoria with a complex terpene profile, making it the ideal choice for growers seeking both massive harvests and top-tier recreational effects.

Key features and benefits in a nutshell

• 55% Sativa / 45% Indica genetics: Enjoy a balanced growth structure that is easy to manage, meaning less stress in your grow tent.
• 8-week indoor flowering: Harvest your crop faster than most Sativa-dominant strains, saving you time and electricity.
• High THC levels: Experience a powerful, cerebral, and fun effect that is perfect for social gatherings and creative sessions.
• Complex terpene profile: Delight your senses with a rich blend of exotic fruits, citrus, incense, and spices for a truly gourmet smoke.
• Massive yields: Produce up to 600 g/m² (1.96 oz/ft²) indoors, ensuring your stash jars stay full for months.

Technical specifications

• Breeder: Bulk Seed Bank
• Type: Feminized photoperiod
• Dominance: 55% Sativa / 45% Indica
• Genetics: Haze Hybrid × Northern Lights #5 × Shiva Skunk
• Flowering Time (Indoor): 8 weeks
• Harvest Time (Outdoor): End of September (Northern Hemisphere)
• Yield (Indoor): Up to 600 g/m² (1.96 oz/ft²)
• Yield (Outdoor): Up to 1.60 kg/plant (3.53 lb/plant)
• Height (Indoor): 0.80–1.20 m (2.62–3.94 ft) approx.
• Height (Outdoor): 1.50–2.00 m (4.92–6.56 ft) approx.
• Difficulty: Low to Medium
• Ideal climate: Dry and sunny; greenhouse recommended for humid coastal areas
• THC: High (approx. 18-22%)
• CBD: Low

How to grow Jack Hair efficiently

Quick overview and setup

This feminized photoperiod strain thrives in dry climates and controlled indoor environments.

• Maintain temperatures around 22–25 °C (71.6–77 °F).
• Keep indoor humidity at 50-60% during vegetative growth.
• Use 7 L (1.85 gal) pots for indoor setups.

Safe start and vegetative phase

Establish a strong foundation with an 18/6 light cycle and a well-aerated substrate.

• Germinate seeds in a warm, humid environment.
• Apply Canna Rhizotonic XP to accelerate early root growth.
• Keep your soil pH strictly between 6.2 and 6.4.
• Fit up to 14 plants per square meter indoors.

Flowering and odor control

Switch to a 12/12 light cycle to trigger the explosive 8-week blooming phase.

• Install a carbon filter immediately to neutralize intense odors.
• Lower humidity to 40-50% to prevent bud rot.
• Use Big Bud Powder Advanced Nutrients for heavier yields.

Harvest and outdoor prevention

Outdoor growers should prepare for a late September harvest with massive yields.

• Use 50 L (13.2 gal) pots for maximum outdoor growth.
• Grow in a greenhouse if you live in humid coastal areas.
• Spray Canna Cure preventively against pests and fungi.
• Dry buds slowly at 20 °C (68 °F) for best flavor.

Frequently Asked Questions

Is Jack Hair suitable for beginners?

Yes, despite its Sativa dominance, it is quite resilient and easy to manage indoors, making it a great choice for novice growers who want premium results.

How strong is the smell during flowering?

The aroma is extremely intense. You will definitely need a high-quality carbon filter or an ozone generator if you are growing indoors to maintain discretion.

Can I grow it outdoors in a humid climate?

While it prefers dry and sunny environments, you can grow it in humid coastal areas if you use a well-ventilated greenhouse and apply preventive organic fungicides.

What kind of effects can I expect?

Expect a highly cerebral, uplifting, and euphoric high. It is a fantastic daytime strain, perfect for creative activities or sharing a good laugh with friends.

Personal Experience of Pevgrow’s CEO (Alan)

I have had the pleasure of growing Jack Hair a couple of times, and it never ceases to amaze me. What I love most is how it captures that nostalgic, old-school incense and citrus aroma while delivering modern-day yields. Indoors, I usually run it in 7 L (1.85 gal) pots, squeezing about 14 plants into my grow tent. The canopy fills out beautifully, and the trichome production is off the charts—the buds literally look like they have been rolled in powdered sugar.

One thing I always warn my buddies about is the smell. By week four of flowering, the fragrance is so loud that a fresh carbon filter is absolutely non-negotiable. Outdoors, I highly recommend giving it plenty of root space; a 50 L (13.2 gal) pot with a rich soil mix will turn this plant into an absolute monster by the end of September. It is a staple in my seed stash for when I want a fun, cerebral smoke that gets the whole room laughing.