303 OG Feminized vs Ace of Spades Feminized — Side-by-Side Comparison

303 OG Feminized comes in higher on the lab sheets at around 24, compared with 20 for Ace of Spades Feminized. That said, real-world potency depends on phenotype, cure, and grow conditions — both strains can deliver a serious hit when grown well.

Both strains finish in roughly the same yield band ( vs ), so the better choice depends on whether your tent leans toward short bushy plants or taller, stretchier ones.

303 OG Feminized and Ace of Spades Feminized flower on essentially the same schedule ( and ), so harvest timing is unlikely to be the deciding factor between them.

Both strains land at similar difficulty (Intermediate vs Intermediate). Either is approachable for a grower who can hold steady humidity and feed on schedule, and neither is going to baby-sit a beginner more than the other.

Royal King Seeds carries both 303 OG Feminized and Ace of Spades Feminized as feminized seeds shipped discreetly across the United States. Each strain ships with our 95% germination guarantee and tracked 3–5 day delivery. Visit the 303 OG Feminized page or the Ace of Spades Feminized page to pick your pack size.