The shortest version: Sensi Seeds's take on hybrid genetics, 17-23% THC, 9-11 weeks total flowering, easy grow.

Lineage: Jack Herer and Cinderella Jack crossed with Northern Lights — that combination pulls in sativa stretch and cerebral character from one side, then reins it in with the indica stability NL is known for. The autoflowering format wraps the whole thing up in 9–11 weeks from seed, no light-schedule management needed. Indoors, growers are seeing 450–600 g/m², which is a serious return for an auto, and THC typically lands in the 17–23% range — enough to satisfy without tipping into the anxiety territory some high-THC cuts can bring. The terpene profile skews citrus and fruit with a grounding earthy base. Because it flowers on its own schedule regardless of daylight hours, this one is particularly well-suited to Canadian outdoor growers in shorter-season regions like the Prairies or northern BC, where a photoperiod strain would struggle to finish before the first frost.

Best for newer growers who want a reliable, high-yielding auto without babysitting a light cycle, or outdoor growers racing a short summer.

Genetics & Lineage

Sensi Supreme Jack Automatic traces its genetics to Jack Herer and Cinderella Jack on one end × Northern Lights on the other. 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 Sensi Seeds, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily euphoric and relaxed 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 23%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Sensi Supreme Jack Automatic delivers THC levels of 17-23%, 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 Sensi Supreme Jack Automatic

Sensi Supreme Jack Automatic 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 9-11 weeks total with yields of 450-600g/m². Plants typically reach 70-120cm indoors. This strain responds exceptionally well to SCROG (Screen of Green) and LST (Low Stress Training), which can boost yields significantly. 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 the dense, heavy buds this strain produces.

Flavor, Aroma & Terpene Profile

Sensi Supreme Jack Automatic features a fruity, citrus, earthy, pine terpene profile that develops complexity throughout the flowering cycle. Sweet berry and grape notes dominate the inhale, with a sugary exhale that lingers on the palate. 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, Sensi Supreme Jack Automatic 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 Sensi Supreme Jack Automatic?

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 Sensi Supreme Jack Automatic from Seennabis?

When you purchase Sensi Supreme Jack Automatic through Seennabis, you are buying directly from Sensi Seeds — The world's oldest cannabis seed bank, founded in Amsterdam in 1985. Every order includes verified genetics, discreet shipping, and responsive seller support. Sensi Seeds has completed over 177 sales.