Coastal Genetics' Black Jack autoflower hybrid bridges classic energetic genetics with modern cookie/cake/runtz lineage, delivering sun-grown resilience and mold resistance in a compact 100-160cm frame. This autoflower seeds cultivar finishes in 7-9 weeks with a solid 400-500g/m² yield and 19% THC, making it ideal for growers seeking speed without sacrificing potency. Expect uplifting, euphoric effects complemented by earthy and pine flavors that reflect the full-spectrum terpene profile bred into the cross. The fast finish and mold-resistant genetics showcase the California coastal craft approach to stability, while the straightforward grow difficulty means both novices and experienced cultivators can succeed. Explore more from the Coastal Genetics catalog or compare with Terminator OG for another rapid-finishing option from this coastal breeder.

Genetics & Lineage

Black Jack Auto traces its genetics to 70% Indica/30% Sativa (Coastal Genetics). This hybrid-dominant autoflower seed produces plants that express the best traits of its parent lineage, delivering consistent results for growers of all experience levels. Bred by Coastal Genetics, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily relaxed and euphoric effects, making this strain ideal for evening use and unwinding after a long day. The body-centered stone builds gradually, easing tension and promoting deep physical relaxation. With THC levels reaching 19%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Black Jack Auto delivers THC levels of 19%, placing it in the moderate-to-strong range that most regular consumers find comfortable. CBD content is minimal, so the psychoactive effects are front and center. The onset typically arrives within minutes with a balanced head-and-body experience that evolves over time.

Growing Black Jack Auto

Black Jack Auto is rated as easy difficulty, making it an excellent choice for first-time growers. The plants are resilient, forgiving of common mistakes like overwatering or inconsistent feeding schedules.

Indoor Growing: Expect a flowering time of 7-9 weeks with yields of 400-500g/m2. Plants typically reach 100-160cm indoors. Standard training techniques like topping and LST will help manage height and improve light penetration. Maintain temperatures between 68-80°F with relative humidity around 45-55% during flowering.

Outdoor Growing: This versatile strain performs well in both indoor and outdoor environments. Outdoor growers in warm climates can expect harvest from late September through October. Watch for humidity during late flowering to prevent bud rot, especially with dense flower formations.

Flavor, Aroma & Terpene Profile

Black Jack Auto features a earthy, pine terpene profile that develops complexity throughout the flowering cycle. Sharp forest and resin notes create a fresh, invigorating flavor with earthy depth. The aroma intensifies significantly during the final 2-3 weeks of flowering — carbon filtration is recommended for indoor grows requiring discretion.

Medical Benefits

While individual experiences vary, Black Jack Auto is commonly reported to help with stress relief, chronic pain, insomnia, and muscle tension. The deeply relaxing effects make it a popular choice among medical users seeking nighttime relief. As with any cannabis strain, start with a low dose and increase gradually. Consult a healthcare professional before using cannabis for medical purposes.

Who Should Grow Black Jack Auto?

This strain is ideal for beginner growers looking for a reliable, low-maintenance plant that delivers consistent results without advanced techniques. If you're looking for evening relaxation and deep stress relief, this is your strain.

Why Buy Black Jack Auto from Seennabis?

When you purchase Black Jack Auto through Seennabis, you are buying directly from Coastal Genetics — California coastal craft breeder. Every order includes verified genetics, discreet shipping, and responsive seller support. Coastal Genetics has completed over 37,750 sales with a 4.7-star rating from 2,832 verified reviews.