Black Jack® Feminized Seeds by Sweet Seeds – Balanced Indica-Sativa Hybrid with High THC & Resinous Yields

Black Jack® feminized seeds by Sweet Seeds deliver a perfectly balanced hybrid experience, combining euphoric cerebral highs with deep physical relaxation — all wrapped in dense, resin-coated buds that glisten like morning frost.

Ever feel torn between chasing a creative daytime buzz or sinking into a soothing nighttime calm? Most strains lean too hard one way or the other, leaving you stuck with the same old ritual. You end up forcing a sativa when you need chill, or numbing out with an indica when you want clarity.

That imbalance kills the vibe. You either overstimulate or oversedate — and neither feels natural. Sharing becomes awkward when the high doesn’t match the mood, and solo sessions lose their spark when the effect is one-dimensional.

Black Jack® flips the script. Born from elite clones of Black Domina’98 and Jack Herer, this 50% indica / 50% sativa hybrid brings harmony to your highs. Whether you're flying solo or passing the pipe, it adapts — delivering a clean, uplifting euphoria without anxiety, followed by a smooth, relaxing finish that never locks you to the couch.

What It’s Like to Use Black Jack® on Your Own

When it’s just you and the plant, Black Jack® becomes your creative co-pilot. The high kicks in with a bright, clear-headed rush — perfect for journaling, sketching, or just zoning into your favorite playlist. There’s no mental fog, no racing thoughts. Just focus, flow, and a gentle warmth spreading through your body.

You stay present, aware, and in control. It’s the kind of strain that makes a quiet evening feel luxurious — whether you're reading under a blanket or watching the stars from your balcony. The flavor? A rich blend of sweet musk and pine incense, like walking into a sacred forest temple.

What It’s Like When You Share It

Pass the joint, and the energy shifts. Black Jack® keeps the conversation flowing — laughter comes easier, stories get longer, and the vibe stays light but grounded. It’s not a giggle-fit sativa or a stoney silence. It’s the Goldilocks of social cannabis: just right.

Because it’s so balanced, everyone in the circle finds something to love. The indica lovers appreciate the body ease, while sativa fans enjoy the mental lift. No one gets too high, no one gets left behind. And with its heavy resin production, your buds look so good they practically beg to be shared.

Advantages and Benefits in Both Types of Ritual

• Perfect 50/50 balance for day or night, solo or social
• High THC (16–21%) delivers strong yet clear-headed euphoria
• Dense, resinous buds enhance both flavor and potency
• Adapts to your mood — uplifting when needed, relaxing when required
• Thrives in indoor and outdoor grows, reaching up to 3 m (9.84 ft)
• Proven genetics with multiple awards for quality and performance
• Smooth smoke with no harshness, ideal for joint or vaporizer

Tips for Choosing How and With Whom to Use It

Black Jack® shines in different ways depending on the setting. Here’s how to get the most out of every harvest:

• Use alone when you want creativity, focus, or gentle relaxation
• Share in small groups for deep conversations or chill hangouts
• Vape for a cleaner, more controlled experience
• Roll it when you want to savor the full flavor with friends
• Choose evening sessions if you want a stronger body effect

Technical specifications

• Breeder / Brand: Sweet Seeds
• Type: Feminized
• Dominance: 50% indica / 50% sativa
• Genetics / Cross: Black Domina’98 × Jack Herer
• Flowering: 9 weeks (indoor), harvest September–October (outdoor, Northern Hemisphere)
• Yield: Up to 600 g/m² (21.19 oz/ft²) indoors · 700 g/plant (24.69 oz/plant) outdoors
• Height: 1.20–1.50 m (3.94–4.92 ft) indoors · 2.50–3.00 m (8.20–9.84 ft) outdoors
• Difficulty: Low to medium
• Structure and vigour: Strong hybrid vigor, dense branching, moderate stretch
• Ideal climate: Mediterranean, temperate, continental
• Resistance: Good resistance to fungi and pests
• Training: Suitable for LST, SCROG, topping, and defoliation
• Recommended pot / substrate: 11–20 L depending on space · soil or coco with good aeration
• Light: 18/6 (vegetative) · 12/12 (flowering)
• Temperature: 22–26 °C (veg) · 20–25 °C (flowering)
• Humidity: 60–70% (seedling) · 50–60% (veg) · 40–50% (flowering)
• pH: 6.0–6.5 (soil) · 5.8–6.2 (coco/hydro)
• THC: 16–21%
• CBD: approx. 1%
• Aromatic profile: Sweet musk, pine, incense (dominant terpenes: myrcene, pinene, limonene)
• Flavour: Sweet, earthy, with hints of pine and spice
• Effect: Balanced cerebral and body high, euphoric and relaxing — ideal for daytime or evening use

How to grow Black Jack® feminized seeds

Black Jack® is a grower favorite thanks to its resilience, vigor, and adaptability. Whether you're in a grow tent or a sunny backyard, this strain rewards care with massive, resin-drenched colas.

Quick overview: feminized photoperiod · Sweet Seeds · 9-week flowering · low to medium difficulty · ideal for indoor and outdoor setups.

Safe start: Germinate seeds in a moist, dark environment at 22–25 °C. Transplant carefully once the taproot reaches ~1 cm (0.39 in). For a stronger root foundation, X-Seed organic vegan seed germinator | BAC boosts early development and reduces stress.

Stable seedling: Keep humidity at 60–70% and provide gentle light. Water lightly and ensure excellent drainage. Introduce Alg-A-Mic BioBizz early to strengthen roots and enhance nutrient uptake.

Directed growth: Switch to 18/6 light cycle and increase intensity. Use 11–20 L pots depending on space. Train with LST or SCROG to maximize light exposure. Maintain pH 6.0–6.5 in soil or 5.8–6.2 in coco.

Efficient flowering: Flip to 12/12 to trigger bloom. Control humidity at 40–50% to prevent mold. Support heavy branches with stakes. Boost resin and density with Bud Booster Green Planet during peak flowering.

Harvest and refinement: Harvest when trichomes turn milky to amber for a balanced effect. Flush 7–10 days before cut. Dry at 18–22 °C and 50–60% RH. Cure for 2–4 weeks in glass jars for maximum flavor.

Frequently Asked Questions

Is Black Jack® good for beginners?

Yes, it’s beginner-friendly thanks to its strong resistance to pests and mold, predictable growth, and forgiving nature. Just avoid overwatering and respect light cycles.

How tall does Black Jack® get outdoors?

In optimal conditions, it can reach 2.50–3.00 m (8.20–9.84 ft), making it a standout in any garden. Ensure it has enough space and sunlight.

Can I grow Black Jack® in a Sea of Green (SOG)?

Absolutely. Its compact indoor structure and fast flowering make it ideal for SOG. Use 9–12 plants per m² for maximum efficiency.

Does it smell strongly during flowering?

Yes, it has a medium to high odor profile, especially in late flowering. Use a carbon filter like those in our Seedfinder collection to stay discreet.

What’s the best time to harvest Black Jack®?

Harvest when 70% of trichomes are milky and 30% are amber for a balanced high. For more relaxation, wait until more turn amber.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown Black Jack® three times now — twice indoors under 600W HPS, once outdoors in my cousin’s olive grove. The first indoor grow was pure fire: 580 g/m² of frosty, pine-scented buds that hit like a joyful thunderbolt. I shared it at a rooftop jam session, and everyone kept asking, “What is this? It’s so clear but so strong.”

Outdoors, it turned into a 2.80 m (9.19 ft) monster, dripping with resin. I let it go a few days past peak for a heavier body stone, perfect for post-harvest chilling. My only tip? Don’t skip the pre-flush — it makes the smoke silkier. This strain earns its awards. Every. Single. Time.