Quick read: 16-20% THC, 60-120cm mature height, 8-10 weeks total bloom. Genetics: G13 Autoflower (ILGM genetics). Difficulty: easy.

ILGM lists this at $45.36 — the upper end of the comparison range (up to $39.83). Pack options: 3-seed at $45.36, 5-seed at $75.60, plus larger sizes.

Lineage: the G13 story traces back to a cutting allegedly lifted from a government research program — whether that legend holds water or not, the modern autoflowering version is a legitimate workhorse for home growers. ILGM's build runs 16–20% THC, leans hard indica, and wraps up from seed to harvest in 8–10 weeks flat. Indoor growers regularly pull 450–600g/m² when conditions stay consistent, and the earthy-sweet profile carries through in the dried flower. The effects land on the heavier, sedative end — this isn't an afternoon strain for most people.

Difficulty is rated easy, and it handles both indoor and outdoor setups without much fuss, so it doesn't demand a dialed-in environment to perform. Autoflowering means no light-schedule management, which removes one of the bigger variables for newer growers. Best suited to beginners who want a low-maintenance indica run, or experienced growers looking to fill a tent cycle quickly without babysitting.

Genetics & Lineage

G13 traces its genetics to G13 Autoflower (ILGM genetics). This indica-dominant autoflower seed produces plants that express the best traits of its parent lineage, delivering consistent results for growers of all experience levels. Bred by ILGM, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily relaxed and sleepy 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 20%, this offers a well-balanced experience suitable for most users with some cannabis familiarity.

THC Level & Potency

G13 delivers THC levels of 16-20%, 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 easy difficulty, making it an excellent choice for first-time growers. The plants are resilient, forgiving of common mistakes like overwatering or inconsistent feeding schedules.

Indoor Growing: Expect a flowering time of 8-10 weeks total with yields of 450-600g/m2. Plants typically reach 60-120cm 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 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 the dense, heavy buds this strain produces.

Flavor, Aroma & Terpene Profile

G13 features a earthy, 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 beginner growers looking for a reliable, low-maintenance plant that delivers consistent results without advanced techniques. 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 ILGM — I Love Growing Marijuana (ILGM) — the #1 beginner-friendly seed bank since 2012. Every order includes verified genetics, discreet shipping, and responsive seller support.