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

Coastal Genetics lists this at $44.99 — above the median of $30.94 across 15 listings. Pack options: 3-seed at $44.99, 5-seed at $44.99, plus larger sizes.

Lineage: Coastal Genetics' G13 sits at 70% Indica / 30% Sativa, a ratio that keeps plants compact enough for most tent setups while still carrying enough stretch to fill a canopy without training headaches. At 22% THC and a 10–11 week flower window, this one rewards patience over speed — not the fastest finisher on the shelf, but the extra week or two tends to show up in density and aroma development. Yields land in the 400–500 g/m² range under decent light, which is honest mid-to-upper territory for a feminized indica-leaning plant.

The nose leans citrus with a clean sweetness underneath — nothing polarizing, just a straightforward aromatic profile that most people in the room will appreciate. Coastal Genetics bred this for outdoor sun performance, but it adapts well indoors too. Moderate difficulty means first-timers may want a run or two under their belt before popping these. Best suited to growers who can commit to a full 11-week finish and want consistent, predictable results rather than novelty.

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.