3 Kings Autoflower vs 303 OG Feminized — Side-by-Side Comparison
3 Kings Autoflower versus 303 OG Feminized is one of the more revealing matchups you can run as a home grower. The two strains share the same shelf at most seed banks, but their THC ceilings, flowering windows, and yield profiles diverge enough that a single decision tree can save you a full season of regret.
3 Kings Autoflower vs 303 OG Feminized at a glance
| Spec | 3 Kings Autoflower | 303 OG Feminized |
|---|---|---|
| THC | 16% | 24%winner |
| Strain split | 13% Indica / 87% Sativa | 58% Indica / 42% Sativa |
| Flowering time | 8-10 weekswinner | — |
| Indoor yield | 350-500g/m² | — |
| Outdoor yield | 50-200g/plant | — |
| Plant height | 60-100cm | — |
| Difficulty | Easywinner | Intermediate |
| Autoflower | Yes | No |
| Feminized | Yes | Yes |
Effects compared
3 Kings Autoflower delivers
Both share
303 OG Feminized delivers
3 Kings Autoflower and 303 OG Feminized both bring happy to the experience, but 3 Kings Autoflower leans more into energetic territory while 303 OG Feminized pushes harder on relaxed effects.
Growing 3 Kings Autoflower vs growing 303 OG Feminized
3 Kings Autoflower
- Flowering: 8-10 weeks
- Indoor yield: 350-500g/m²
- Outdoor yield: 50-200g/plant
- Height: 60-100cm
- Difficulty: Easy
3 Kings Autoflower delivers uplifting sativa effects in a fast-finishing autoflowering format — seed to harvest in 9-11 weeks.
303 OG Feminized
- Flowering: Not specified
- Indoor yield: Not specified
- Outdoor yield: Not specified
- Height: Not specified
- Difficulty: Intermediate
303 OG Feminized autoflower seeds — hybrid genetics at 22-26% THC. Relaxed effects with earthy flavor. Ships across Canada.
3 Kings Autoflower finishes 91 weeks sooner than 303 OG Feminized, which matters most for outdoor growers chasing the first frost or anyone running back-to-back indoor cycles. On harvest weight, 3 Kings Autoflower edges ahead, especially when you give it a full SCROG net. If you are still building muscle memory around feeding and humidity control, lean on 3 Kings Autoflower.
Which should you grow?
So which strain wins?
Best for beginners
3 Kings Autoflower
Best yield
3 Kings Autoflower
Fastest harvest
3 Kings Autoflower
Highest THC
303 OG Feminized
Frequently asked questions
Which is stronger, 3 Kings Autoflower or 303 OG Feminized?+
303 OG Feminized comes in higher on the lab sheets at around 24%, compared with 16% for 3 Kings Autoflower. That said, real-world potency depends on phenotype, cure, and grow conditions — both strains can deliver a serious hit when grown well.
Which yields more, 3 Kings Autoflower or 303 OG Feminized?+
3 Kings Autoflower pulls ahead on yield with up to 350-500g/m², while 303 OG Feminized tops out around . If grams per square meter is the deciding factor, 3 Kings Autoflower is the safer pick.
Which is faster to harvest?+
3 Kings Autoflower flowers in around 8-10 weeks, beating 303 OG Feminized's window. For a quicker turn-around or for outdoor growers fighting an early frost, 3 Kings Autoflower is the smarter bet.
Which is easier to grow?+
3 Kings Autoflower is the more forgiving plant of the two — rated Easy versus Intermediate for 303 OG Feminized. First-time growers will have a smoother run with 3 Kings Autoflower, especially in a small tent.
Where can I buy 3 Kings Autoflower or 303 OG Feminized seeds in Canada?+
Royal King Seeds carries both 3 Kings Autoflower and 303 OG Feminized as feminized seeds shipped discreetly across Canada. Each strain ships with our germination guarantee and tracked Canada Post delivery in plain unmarked packaging. Visit the 3 Kings Autoflower page or the 303 OG Feminized page to pick your pack size in CAD.
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