Sirius Black brings Advanced Genetics' signature potency to a compact indica that delivers serious yields without demanding expert-level cultivation. This feminized strain hits 22% THC while finishing in 8-9 weeks, producing around 400g/m² from plants that stay between 100-160cm tall—ideal for controlled environments. The high arrives euphoric and deeply relaxing, complemented by a complex flavor profile blending citrus brightness with earthy pine undertones. Growers with moderate experience will appreciate its straightforward care requirements and consistent terpene expression, hallmarks of Advanced Genetics' American breeding philosophy seen across strains like Slurricane and Member Berries. If you're exploring feminized seeds with reliable genetics, this heavyweight performer sits alongside cultivars like Jack Frost in delivering the breeder's commitment to modern, big-yielding hybrids.

Genetics & Lineage

Sirius Black traces its genetics to 75% Indica/25% Sativa (Advanced Genetics). This indica-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 Advanced Genetics, 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 22%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

Sirius Black delivers THC levels of 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 5-10 minutes, settling into the body as a warm, heavy relaxation.

Growing Sirius Black

Sirius Black 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 8-9 weeks with yields of 400g/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 40-50% 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

Sirius Black features a citrus, earthy, pine terpene profile that develops complexity throughout the flowering cycle. Bright lemon and orange zest punch through on the inhale, with a tangy, refreshing finish. 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, Sirius Black 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 Sirius Black?

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 Sirius Black from Seennabis?

When you purchase Sirius Black through Seennabis, you are buying directly from Advanced Genetics — American craft breeder behind potent hybrids like Slurricane, Member Berries, and Permanent Marker. Every order includes verified genetics, discreet shipping, and responsive seller support. Advanced Genetics has completed over 34,000 sales with a 4.7-star rating from 2,652 verified reviews.