Spec sheet first — strain: sativa, seed type: autoflower, THC: 18-22%, yield band: high, environment: indoor or outdoor.

Lineage: Green House Seeds took their classic Jack Herer — the Haze × Red Skunk cross that earned the original its reputation — and rebuilt it as an autoflower without gutting what made it worth growing in the first place. At 18–22% THC, this version lands firmly in the upper range for autos, and the effect holds longer than most expect from a seed-to-harvest cycle that wraps up in 9–10 weeks total. The pine and earthy nose carries through to the smoke with reasonable honesty. Indoors, growers are reporting 500–700 g/m² under decent light, which is a strong return for an easy-rated auto — useful if you're running a Canadian basement setup or a patio grow through a short prairie summer. The longer-lasting cerebral lean here suits daytime use better than wind-down sessions.

Best for newer growers who want a recognizable sativa-leaning cultivar without the patience demand of a full photoperiod run.

Genetics & Lineage

Jack Herer Auto ® traces its genetics to Jack Herer Auto ® (Green House Seeds genetics). This sativa-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 Greenhouse Seeds, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily energetic and creative effects, making this strain perfect for daytime use, creative projects, and staying productive. The cerebral lift arrives quickly, sharpening focus and inspiring motivation. With THC levels reaching 22%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Jack Herer Auto ® delivers THC levels of 18-22%, 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, starting as a cerebral buzz that gradually expands.

Growing Jack Herer Auto ®

Jack Herer 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 9-10 weeks total with yields of 500-700g/m2. Plants typically reach 60-120cm 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

Jack Herer Auto ® features a pine, earthy 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, Jack Herer Auto ® is commonly reported to help with depression, fatigue, lack of motivation, and ADHD symptoms. The uplifting, focusing effects make it popular among medical users seeking daytime functionality. 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 Herer Auto ®?

This strain is ideal for beginner growers looking for a reliable, low-maintenance plant that delivers consistent results without advanced techniques. If you need a daytime boost for creativity and sustained focus, look no further.

Why Buy Jack Herer Auto ® from Seennabis?

When you purchase Jack Herer Auto ® through Seennabis, you are buying directly from Greenhouse Seeds — Renowned Strain Hunters founded by Arjan Roskam, 'The King of Cannabis'. Every order includes verified genetics, discreet shipping, and responsive seller support. Greenhouse Seeds has completed over 92 sales.