The shortest version: Sensi Seeds's take on sativa genetics, 18-24% THC, 10-14 weeks flowering, advanced grow.

Smell-first impression: cut pineapple and grapefruit rind with a sharp diesel edge underneath — that combination comes from crossing Jack Herer with Piña Colada, a pairing that pushes the finished plant firmly into sativa territory. THC tests typically land between 18–24%, and the structure reflects the lineage: tall, open branching that can hit 160 cm indoors or push past 250 cm under a full Canadian summer sun. That vertical stretch is the main reason this one carries an advanced difficulty rating — topping, LST, or a well-timed scrog are almost non-negotiable if you're running it in a tent. Get the canopy management right and the reward is real: 500–700 g/m² after a 10–14 week flower cycle. Works outdoors in warmer Canadian zones if you're starting early indoors and transplanting after last frost, though the long flower window means coastal and northern growers should confirm their season length first.

Best suited to experienced growers who have the vertical space and the training skills to handle a large sativa frame.

Genetics & Lineage

Pineapple Jack traces its genetics to Pineapple Jack (Sensi Seeds genetics). This sativa-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 energetic and focused 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 24%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Pineapple Jack delivers THC levels of 18-24%, 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 Pineapple Jack

Pineapple Jack is rated as advanced difficulty, making it best suited for experienced cultivators who understand advanced techniques. This strain rewards meticulous attention to detail with exceptional results.

Indoor Growing: Expect a flowering time of 10-14 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

Pineapple Jack features a fruity, citrus, diesel, sweet 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, Pineapple Jack 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 Pineapple Jack?

This strain is ideal for advanced cultivators and breeders seeking exceptional phenotypes and willing to invest the extra care required. If you're looking for evening relaxation and deep stress relief, this is your strain.

Why Buy Pineapple Jack from Seennabis?

When you purchase Pineapple Jack 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.