Quick read: 18-25% THC, 100-170cm mature height, 8-10 weeks bloom. Genetics: Black Muffin F1 Fast Feminised (Seedsman genetics). Difficulty: moderate.

Smell-first: crack a jar of Black Muffin F1 Fast Feminised and the room fills with damp earth and a quiet sweetness that doesn't announce itself loudly — more baking cabinet than candy shop. That restraint carries through to the grow itself. Flowering wraps up in 8–10 weeks, which is quick for a plant capable of stacking 500–650 g/m² under a well-dialed light schedule. THC sits in the 18–25% range, so the ceiling is real, but don't expect a one-dimensional knockout — the profile tends to land somewhere between focused and relaxed depending on harvest timing. Difficulty is moderate, meaning first-timers may struggle with canopy management at peak stretch, but anyone with a grow or two under their belt should hit those yield numbers without drama. Works indoors or out.

Best suited for intermediate growers who want a fast-finishing, heavier-yielding plant without chasing exotic flavors or extreme potency.

Genetics & Lineage

Black Muffin F1 Fast Feminised traces its genetics to Black Muffin F1 Fast Feminised (Seedsman 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 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

Black Muffin F1 Fast 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 Black Muffin F1 Fast Feminised

Black Muffin F1 Fast Feminised 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 8-10 weeks with yields of 500-650g/m². Plants typically reach 100-170cm 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

Black Muffin F1 Fast Feminised 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, Black Muffin F1 Fast 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 Black Muffin F1 Fast Feminised?

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 Black Muffin F1 Fast Feminised from Seennabis?

When you purchase Black Muffin F1 Fast 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.