The specs in one line: 22% THC, <2% CBD, 10-11 weeks flowering, 400-500g/m2 reported. Best indoor or outdoor. moderate grow.

Lineage: 70% Indica / 30% Sativa, bred by Coastal Genetics from their sun-grown G13 line. That heritage shows up in the canopy — plants stay compact enough for most tent setups while still pushing 400–500 g/m² when dialled in properly. The 10–11 week flower window is on the longer side, so indoor growers running tight light schedules should plan accordingly; outdoors in warmer Canadian regions like southern BC or Ontario, a mid-October finish is realistic in a good season.

At 22% THC the potency is solid without being a novelty number. Citrus and sweet notes dominate the nose — nothing complicated, just clean and pleasant. Difficulty sits at moderate, meaning first-time photoperiod growers may want one run under their belt before attempting this one, but it's nowhere near a demanding cut to manage. Best suited to growers who want a straightforward indica-leaning photoperiod with consistent yields and don't need a lot of hand-holding from the plant.

Genetics & Lineage

G13 traces its genetics to 70% Indica/30% Sativa (Coastal 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 Coastal 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

G13 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 minutes with a balanced head-and-body experience that evolves over time.

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 10-11 weeks with yields of 400-500g/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 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 dense flower formations.

Flavor, Aroma & Terpene Profile

G13 features a citrus, sweet terpene profile that develops complexity throughout the flowering cycle. A smooth, candy-like sweetness defines the flavor, with subtle complexity on the exhale. 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 Coastal Genetics — California coastal craft breeder. Every order includes verified genetics, discreet shipping, and responsive seller support.