The specs in one line: 19% THC, <2% CBD, 9-10 weeks flowering, 450g/m2 reported. Best indoor or outdoor. moderate grow.

DNA Crew lists this at $29.84 — the lowest base price in the comparison ($30.66 floor). Pack options: 3-seed at $29.84, 5-seed at $44.99, plus larger sizes.

Lineage: DNA Crew's proprietary Jack Flash Auto traces back to a California cut that most growers never got their hands on in clone form — this autoflower version finally makes it accessible without the hunt. At 19% THC and a citrus-forward flavor that leans sweet rather than sharp, it hits a useful middle ground: strong enough to matter, clean enough to work with during the day. Flowering wraps in 9–10 weeks from seed, and indoor runs consistently pull around 450g/m² when plants get consistent light and a reasonable feed schedule. Height stays manageable, which helps in tents where vertical space is limited. Outdoor and indoor both work here, though indoor growers tend to get more predictable results on the first run.

Rated moderate difficulty — newer growers can finish it, but you'll get more from it once you've dialed in your environment.

Genetics & Lineage

Jack Flash Auto traces its genetics to Proprietary cross (DNA Crew). 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 DNA Crew, 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

Jack Flash 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 Jack Flash Auto

Jack Flash Auto is rated as moderate difficulty, making it suitable for growers with some experience. Basic knowledge of nutrient schedules, pH management, and environmental controls will help maximize results.

Indoor Growing: Expect a flowering time of 9-10 weeks with yields of 450g/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

Jack Flash Auto features a citrus, sweet terpene profile that develops complexity throughout the flowering cycle. A smooth, candy-like sweetness defines the flavor, with subtle complexity on the exhale. 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, Jack Flash 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 Jack Flash Auto?

This strain is ideal for intermediate growers ready to push their skills and be rewarded with superior results. If you're looking for evening relaxation and deep stress relief, this is your strain.

Why Buy Jack Flash Auto from Seennabis?

When you purchase Jack Flash Auto through Seennabis, you are buying directly from DNA Crew — Genetics collective bringing rare California cuts to the masses — runs collaborations with established breeders to release stable, hand-selected feminized seeds. Every order includes verified genetics, discreet shipping, and responsive seller support.