Jack Diesel Feminized Seeds – Positronics Sativa Power with Citrus Diesel Punch

Jack Diesel feminized seeds from Positronics give you a premium sativa-dominant hybrid that merges the legendary Jack Herer with the pungent NYC Diesel, delivering explosive flavor, soaring THC of 19–22%, and a focused, energizing high that keeps you creative and alert.

Ever feel like your daytime strain just doesn’t hit hard enough? Like it lacks that spark to truly elevate your mood and focus?

Most sativas promise energy but fizzle out fast or leave you anxious and scattered. Others smell great but deliver weak effects or take forever to mature. And when you’re investing time and space, a plant that underperforms or collapses under humidity is a total buzzkill.

Without the right genetics, you’re stuck with inconsistent highs, mold-prone buds, or harvests that barely cover your costs. You end up wasting lights, nutrients, and patience on plants that don’t deliver the cerebral punch or aromatic complexity you’re after.

Jack Diesel fixes that. This isn’t just another Jack cross—it’s a refined powerhouse built for flavor, resilience, and fast, high-yielding results. With a flowering time of just 60–70 days, it grows muscular and compact with short internodes, making it ideal for indoor setups or sunny outdoor spots. Its penetrating aroma—citrus, sandalwood, and diesel—fills the room, but the taste is even better: rich, complex, and unmistakably premium.

How Your High Changes with Jack Diesel

You go from sluggish to sharp. From dull to driven. Jack Diesel doesn’t just wake you up—it supercharges your mind. The effect is cerebral, uplifting, and deeply creative, perfect for artists, thinkers, or anyone who wants to stay functional while feeling elevated. No couch-lock, no paranoia—just pure, clean sativa energy that lasts.

What Makes Jack Diesel Smell So Damn Good

This strain doesn’t whisper its presence—it announces it. The terpene profile is dominated by limonene and myrcene, giving you that bright citrus punch layered over earthy, woody depth. Indoors, you’ll need a carbon filter (check out our citric acid Trabe for pH control and odor management), but that intensity translates into flavor that’s richer than it smells. Think ripe mandarin, cedar, and a hint of eucalyptus—all in one smooth hit.

Grow It Right: Simple Setup, Big Results

1. Start with a stable germination environment at 22–25 °C and high humidity.
2. Use airy soil or coco; transplant once the taproot is ~1 cm long.
3. Keep light cycles at 18/6 during veg and switch to 12/12 to trigger flowering.
4. Train early with LST to control height and expose more bud sites.
5. Monitor humidity—keep it at 50–60% in veg and drop to 40–50% in flowering to prevent mold.
6. Flush 7–10 days before harvest when trichomes turn milky to amber.

Technical specifications

• Breeder / Brand: Positronics Seeds
• Type: Feminized
• Dominance: Sativa-dominant hybrid
• Genetics: Jack Herer × NYC Diesel
• Flowering time: 60–70 days
• Outdoor harvest: Late September (Northern Hemisphere)
• Indoor yield: High (exact g/m² not specified by breeder)
• Outdoor yield: High (up to 3 meters tall in optimal conditions)
• Indoor height: 80–110 cm (31.50–43.31 in)
• Outdoor height: 2–3 m (6.56–9.84 ft)
• Difficulty: Medium
• Structure: Vigorous, short internodes, strong central cola
• Climate: Mediterranean, temperate
• Resistance: Moderate resistance to fungi
• Training: Suitable for LST, topping, SCROG
• Recommended pot: 11–20 L depending on space
• Light: 18/6 (veg), 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)
• Smell in grow: High – use carbon filter recommended
• THC: 19–22%
• CBD: ± 0.5%
• Aromatic profile: Citrus, fruity, sandalwood, cedar, eucalyptus
• Flavour: Noble woods, mandarin, diesel
• Effect: Cerebral, uplifting, creative – ideal for daytime use

Advantages and benefits of growing Jack Diesel

• Fast flowering with high, consistent yields
• Potent THC levels for a strong, clear-headed effect
• Complex citrus-diesel flavor that’s even better when smoked
• Vigorous growth and strong structure reduce plant stress
• Short internodal spacing maximizes bud production
• Resilient to mold and pests in controlled environments
• Perfect for LST and SCROG setups to boost indoor yields

Frequently Asked Questions

How long does Jack Diesel take to flower?

Jack Diesel flowers in 60–70 days under a 12/12 light cycle, making it a fast and reliable choice for indoor and outdoor grows.

Is Jack Diesel good for beginners?

It’s medium difficulty—best for growers with some experience. It’s vigorous but needs humidity control and light training to reach its full potential.

What kind of effects does Jack Diesel have?

It delivers a cerebral, uplifting, and creative high—perfect for daytime use. No sedation, just focus and energy.

Does Jack Diesel smell strong during flowering?

Yes, very. It has a powerful citrus-diesel aroma. Use a carbon filter or ozonator if growing indoors to manage odor.

Can I grow Jack Diesel outdoors?

Absolutely. In full sun and warm climates, it can reach up to 3 meters tall and produce massive yields. Stake the branches to support heavy buds.

Personal Experience of Pevgrow’s CEO (Alan)

I grew Jack Diesel last season in my greenhouse, and damn—this one’s a standout. I started with LST at week 3, kept the humidity tight, and used a simple soil mix with Root Juice BioBizz for root strength. By week 8 of flower, the smell was unreal—like a citrus grove dipped in diesel. The high? Clean, fast, and motivating. I didn’t crash, didn’t get anxious—just pure flow. I’d grow it again in a heartbeat. Pro tip: top it early. You’ll get more even colas and better light penetration.