From the lab panel — 17-23% THC, <1% CBD. From Canadian grower reports — 500-700g/m² yield, fruity/skunky dominant in cured flower. easy grow.

Lineage: built on Sensi Seeds' original Jack Herer cross, this feminized version keeps the same genetic backbone that earned the strain its Dutch medicinal recognition decades ago. THC sits between 17–23%, and indoor runs regularly log 500–700 g/m² over a 7–9 week flower period — solid numbers for a strain that doesn't demand much from the grower. Phenotype expression varies noticeably: most plants lean sativa in structure, stretching hard through flower and pushing heavy resin along the way, while a less common compact phenotype stays tighter and suits smaller tents better. Expect a mix of fruity, skunky, and earthy on the nose — nothing one-dimensional about it. The feminized format cuts out the guesswork on sexing, which is part of why this works well in both indoor and outdoor Canadian setups, including shorter-season grows in BC or Ontario where reliability matters.

Best suited to newer growers who want a manageable, high-yielding plant without sacrificing potency.

Genetics & Lineage

Jack Herer traces its genetics to Jack Herer (Sensi Seeds genetics). This hybrid-dominant feminized 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 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 23%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Jack Herer 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 Jack Herer

Jack Herer 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 500-700g/m². Plants typically reach 100-180cm 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 features a fruity, skunky, 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, Jack Herer 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 Herer?

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 Jack Herer from Seennabis?

When you purchase Jack Herer 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.