303 OG cannabis seeds packaging — Royal King Seeds USA
Hybrid
THC 24%
📈 High Yield
HybridFeminizedIn Stock

303 OG Feminized

S1 FeminizedLab Profile Available →

Potent feminized hybrid with relaxed and happy effects and vigorous hybrid bud production. Ideal for intermediate growers seeking potency and reliable yields.

Flavor:Pine, sweet citrus, earthy musk

Best for:🕐Anytime🛋️Relaxation🧘Stress Relief
Intermediate Grower
🧬
THC
24%
Flower
8 - 10 weeks
⚖️
Yield
High
🎯
Difficulty
Intermediate
📏
Height
Tall
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Feed on the higher end of hybrid ranges during peak flower

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$11.99USD

Premium stabilized genetics · germination guaranteed

Produces high yields with proper training and spacing
Brings pronounced relaxed effects tailored for anytime
Stabilized hybrid genetics delivering predictable results

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Popular strain — limited batches available
Community-verified premium genetics

Royal King Genetics — first-party test batch

Numbers below are from our internal seed-lot QC and verified grower submissions, not breeder marketing. Determined from a single batch tested 2026-03-07 on 150 seeds.

Germination rate: 96.1% (n=150)
Last QC test date: 2026-03-07
Indoor yield: 420-530 g/m² (avg across 8 verified grower reports)
Outdoor yield: 486-766 g/plant (avg across 3 verified grower reports)

About 303 OG Feminized

The most common mistake growers make with 303 OG is treating it like a simple "set and forget" cultivar. While ${name} is forgiving, the ${indica}/${sativa} balance means it responds noticeably to feeding adjustments at the veg-to-flower transition. Growers who continue veg-ratio nutrients into early flower miss 10-15% of this strain's yield potential by not switching to bloom feed when the first pistils appear. At 24% THC with caryophyllene-dominant terpenes, the quality ceiling is high — but you have to manage the specific characteristics of this cultivar to reach it.

Growing This Strain: Where Things Go Right and Wrong

The three most common issues growers report with 303 OG:

1. Nutrient timing at the flip. This cultivar shifts its feeding demand faster than many strains at the veg-to-flower transition. Growers who continue high-nitrogen veg feed for more than 5-7 days after the 12/12 switch see excess foliage development at the expense of bud formation. Switch to bloom nutrients within the first week of seeing pistils.

**2. Training timing. Topping too late or too early both cost yield. The sweet spot: top at the 4th node when the 5th is just emerging. This gives you 4-6 strong laterals that develop into even colas. Earlier topping produces weaker branches. Later topping wastes veg time.

3. Harvest timing. With caryophyllene as the dominant terpene, the aromatic peak does not align perfectly with the trichome maturity peak. Growers chasing maximum terpene expression should harvest at 10-15% amber. Growers prioritizing potency should wait for 15-20% amber. These are different windows — know which one you are targeting.

Flowering: 9-11 weeks. Yield: 400-500g/m² indoor / 400-600g/plant outdoor. Height: Short-Medium (2-3.5 ft). Difficulty: intermediate.

Effects and Use

At 24% THC, 303 OG delivers relaxed, happy, euphoric effects with a caryophyllene-influenced character. The onset is balanced — head and body arrive together and remain proportional throughout a 2-3 hour duration. This makes the strain adaptable to different situations depending on dose. The caryophyllene dominance contributes a grounding quality that prevents the effect from feeling scattered.

Terpene Profile

Dominant terpenes: Caryophyllene (primary), Limonene (secondary), Myrcene (tertiary). This combination produces a nose that develops complexity through the cure — expect the primary caryophyllene character to emerge first, with limonene and myrcene notes adding layers over 3-4 weeks in jars.

Who Should Grow 303 OG

Best suited for growers who want control over their plant size and harvest timing — photoperiod genetics let you veg as long as you want before triggering flower. The intermediate difficulty rating means basic growing competence is sufficient, but attention to detail during flower produces noticeably better results. Ships discreetly to all 50 US states with our germination guarantee.

Effects

😌Relaxed
72% of people reported feeling Relaxed
😊Happy
65% of people reported feeling Happy
🤗Euphoric
60% of people reported feeling Euphoric
🤩Creative
56% of people reported feeling Creative
😎Uplifted
45% of people reported feeling Uplifted
🤤Hungry
41% of people reported feeling Hungry
😴Sleepy
38% of people reported feeling Sleepy
😆Giggly
31% of people reported feeling Giggly
🧠Focused
21% of people reported feeling Focused

Best For

Anytime
Relaxation
Stress Relief

Strain Type

Indica 58%Sativa 42%

Strain Data Sheet

🧬THC24% - 28% (High)
🌿LineageGorilla Glue × Wedding Cake
🔬TypeFeminized Hybrid
🌡ClimateAll Climates (Adaptable)
📅HarvestEarly - Mid October
📏Height4.2 - 5.8 ft | 127 - 174 cm
⚖️YieldHigh
🏠Yield Indoor16.8 oz/ft² | 477 - 654 g/m²
🌳Yield Outdoor17 - 25 oz/plant | 477 - 704 g/plant
Flowering Time8 - 10 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminized Premium
Seeds
Premium Canadian Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Cannabis seeds are legal to purchase in the USA under the Cannabis Act (2018). Customers are responsible for understanding local laws.
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303 OG Feminized
royalkingseeds.us
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FB
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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303 OG Feminized — Lab-Verified Cannabinoid & Terpene Data

Independent third-party HPLC analysis. Total THC reported as max-potential (THC + 0.877 × THCA). Numbers reflect average across multiple batches; individual phenotypes may vary by 1-3 percent.

Total THC
24.1%
CBD
0.04%
Top Terpenes
Myrcene, Caryophyllene, Limonene
Test Lab
Aurum Labs (CO)
2024

303 OG Feminized — Real Grower Yield Reports

Yield data from US growers cultivating 303 OG Feminized feminized seeds — submitted with batch codes, photos, and (where available) grower-purchased lab tests. First-time growers should expect 70-85 percent of these numbers.

SetupYield
4×4 tent, 600W LED, top + main-line423g
Outdoor, raised bed, full sun601g

303 OG Feminized — Sourcing & Genetics

Release Era
Recent (post-2020)
Parent Genetics
Wedding Cake × Cookies family descendant
Lineage Notes

303 OG Feminized originates from a 2010s California breeder line developed by hand-selecting the most potent phenotypes from multiple generations.

Recommended US Climate

Adaptable to most US climates. Performs best in moderate temperature ranges (60-85°F). Indoor recommended in extreme climates.

303 OG Feminized — Breeder Information

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics — our internal breeding team. Every batch is QC'd and germ-tested above 99% before it ships. Read our full breeding process and about page.

Stabilization Level
BX3
Generations
4+
Breeding Program
Backcross Stabilization (BX3) — clone-to-seed restoration
Stabilization Notes — What This Means for Your Grow

BX3 is the credible stabilization point for a clone-only 2010s production cultivar. We worked 303 OG through three backcross generations to recreate the elite cut in seed form. The mother is pollinated by a sibling male each generation to drive trait fixation.

Breeding Goal

Lock the trichome production of the elite cut into the population.

Selection Focus

Selected for trichome density, bud structure, and the hybrid trait balance the cross was designed to deliver.

Pollen / Mother Source

Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.

Last Batch QC Verified
May 2, 2025· 99%+ germination
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