Overview
Hybrid · Cannabis Seeds · Autoflowering seedsC4 Auto (Fast Buds) Feminized is a hybrid strain from our autoflowering seeds range testing at 20% THC. Commonly reported effects: relaxing and cerebral.
Highlights
- Three legends, one auto: White Widow, Skunk, and Big Bud genetics in a ruderalis cross.
- 8-week finish: Seed to harvest in 8 weeks, built for short seasons and back-to-back cycles.
- High-output footprint: 90-120cm indoor, up to 600g/m², serious numbers for a compact plant.
- Cerebral and grounded: 16% THC with 1.1% CBD, clear-headed lift that eases into body relaxation.
About this format
Cannabis seeds are sold as collectable souvenirs and for the preservation of genetics. Feminized seeds grow into female plants, autoflowers switch to bloom on their own regardless of light schedule, and regular seeds produce both sexes for breeding. Germination is illegal in many countries — know your local law before you buy.
From the supplier
Three Pillars of Cannabis History in One Auto
C4 Auto brings together three of the most influential strains in cannabis history. Fast Buds crossed White Widow, Skunk, and Big Bud with ruderalis to build this feminized autoflower, and each parent pulls its weight. White Widow brings the resin density and potency foundation. Skunk adds structure and a punchy hybrid character. Big Bud is where the yield ceiling comes from. Ruderalis drives the automatic flowering, cutting the cycle down to 8 weeks from seed to harvest. THC sits at 16%, with a notable 1.1% CBD alongside it, a cannabinoid profile that gives the effects more range than a single-number read suggests. The result is a balanced hybrid with classic bones.
Compact Plant, Serious Output
C4 Auto tops out at 90-120cm indoors, manageable in any standard tent without aggressive canopy work. LST is optional at this height, though the plant responds well to it if you want to spread the canopy and push yields further. Indoor output runs 450-600g/m², which is high for an auto of this size. Outdoors, expect 50-350g per plant depending on conditions. Light-cycle independence means no schedule changes to trigger flowering, which also makes it a practical choice for short-summer climates where a photoperiod strain simply wouldn't finish in time. The 8-week seed-to-harvest timeline fits comfortably into a single season or lets indoor growers run multiple cycles per year.
Clear Head, Easy Body
The effects lean cerebral first, an engaged, clear-headed quality that doesn't cloud thinking, before settling into physical relaxation. The 1.1% CBD softens the edges of the 16% THC, making the experience evening-leaning without tipping into heavy sedation. Earthy, peppery, and herbal undertones come through in the smoke. It's not a couch-lock strain, but it's not a morning pick-me-up either, the sweet spot is late afternoon or a relaxed evening. Compared to a pure THC auto at similar potency, the CBD content here adds a noticeable smoothness to the ride.
