Spec sheet first — strain: indica, seed type: feminized, THC: 20-25%, yield band: medium, environment: indoor or outdoor.

Premium Cultivars lists this at $31.50 — above the median of $30.94 across 15 listings. Pack options: 3-seed at $31.50, 5-seed at $37.50, plus larger sizes.

Lineage: G13 carries one of the more stubborn origin myths in cannabis — government lab escapee, underground clone, whatever the story, the plant itself has outlasted the speculation. Premium Cultivars' feminized version runs 8–10 weeks to finish and consistently tests in the 20–25% THC range, with earthy, faintly floral smoke that comes through cleanly after a proper cure.

Yields land around 400–500g/m² indoors under reasonable light, and the plant handles both indoor and outdoor setups without much fuss. Difficulty is moderate — she responds well to topping and benefits from good airflow since denser indica structure can trap humidity. Effects lean heavy and physical, settling in gradually rather than hitting fast, which makes dosing easier than some high-THC strains at this percentage. Best suited for growers who want a classic indica profile with predictable structure and don't need to chase novelty.

Genetics & Lineage

G13 traces its genetics to G13 (Premium Cultivars). 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 Premium Cultivars, 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

G13 delivers THC levels of 20-25%, 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 G13

G13 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 8-10 weeks with yields of 400-500g/m2. Plants typically reach 100-180cm 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

G13 features a earthy, floral terpene profile that develops complexity throughout the flowering cycle. The complex aromatic bouquet develops fully after proper curing. 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, G13 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 G13?

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 G13 from Seennabis?

When you purchase G13 through Seennabis, you are buying directly from Premium Cultivars — US-based cannabis seed retailer with a curated catalog of feminized, autoflower, and exotic genetics. Every order includes verified genetics, discreet shipping, and responsive seller support.