Seedsman runs this as a hybrid autoflower line — 18-25% THC lab range, earthy/sweet-dominant terps, 9-11 weeks total from flip.

Lineage: Fatso × GMO, two cultivars known for heavy resin production and a damp-earth smell that hits before you even open the jar. This F1 autoflowering cross from Seedsman pushes THC readings between 18–25% in lab panels, which puts it solidly in the upper range for an auto. The earthy, sweet nose carries through to the cure without much loss, which is harder to achieve than it sounds.

On the grow side, the 9–11 week seed-to-harvest window fits neatly into a Canadian outdoor window — start in late May and you're pulling plants before the first September frost warning in most provinces. Indoor growers running 60×60 tents can expect 300–450 g/m² without dialing in anything complicated; Seedsman rates it easy, and the auto structure keeps stretch manageable.

Good pick for growers who want a resin-forward, earthy-profile auto without babysitting a difficult phenotype.

Genetics & Lineage

Fatso GMO F1 Auto traces its genetics to Fatso GMO F1 (Seedsman genetics). This hybrid-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 Seedsman, each seed is selected for genetic stability, terpene expression, and vigor.

Effects & Experience

Users report primarily euphoric and relaxed 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 25%, this is a potent strain recommended for experienced users — newcomers should start low and go slow.

THC Level & Potency

Fatso GMO F1 Auto delivers THC levels of 18-25%, placing it in the high-potency category alongside powerhouses like Gorilla Glue and Girl Scout Cookies. 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 Fatso GMO F1 Auto

Fatso GMO F1 Auto 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 9-11 weeks total with yields of 300-450g/m². Plants typically reach 60-120cm 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

Fatso GMO F1 Auto 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, Fatso GMO F1 Auto 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 Fatso GMO F1 Auto?

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 Fatso GMO F1 Auto from Seennabis?

When you purchase Fatso GMO F1 Auto through Seennabis, you are buying directly from Seedsman — One of the world's largest cannabis seed catalogs, carrying 4,000+ strains from 100+ breeders since 2003. Every order includes verified genetics, discreet shipping, and responsive seller support. Seedsman has completed over 185 sales.