The specs in one line: 18-25% THC, <1% CBD, 9-11 weeks total flowering, 400-550g/m² reported. Best indoor or outdoor. easy grow.

Smell-first: crack a jar of this and the citrus hit is immediate — sharp grapefruit peel with a sweeter fruit note underneath that softens as it dries. Seedsman's autoflowering line has been growing this one for a while, and the numbers hold up consistently: 18–25% THC on a plant that finishes its full cycle in 9–11 weeks from seed, no light-schedule management required.

Yields land in the 400–550 g/m² range indoors, and it handles outdoor runs just as well — useful for Canadian growers squeezing a late-season auto crop before temperatures drop. The plant stays manageable in size and doesn't ask much, which puts it firmly in beginner-friendly territory without boring the growers who've been at it longer. Training helps but isn't mandatory.

Good pick for first-time autoflower growers who want a citrus-forward strain with a reliable harvest window and room to scale up once they've got the basics down.

Genetics & Lineage

Grapefruit Auto Feminised traces its genetics to Grapefruit Auto Feminised (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

Grapefruit Auto Feminised 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 Grapefruit Auto Feminised

Grapefruit Auto Feminised 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 400-550g/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 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 the dense, heavy buds this strain produces.

Flavor, Aroma & Terpene Profile

Grapefruit Auto Feminised features a fruity, citrus terpene profile that develops complexity throughout the flowering cycle. Sweet berry and grape notes dominate the inhale, with a sugary exhale that lingers on the palate. 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, Grapefruit Auto Feminised 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 Grapefruit Auto Feminised?

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 Grapefruit Auto Feminised from Seennabis?

When you purchase Grapefruit Auto Feminised 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.