RK
C4 cannabis seeds packaging โ€” Royal King Seeds the UK
Hybrid
THC 20%
๐Ÿ“ˆ High Yield
HybridFeminizedIn Stock

C4 Feminized

Feminized PhotoperiodSee Lab Report โ†’

Grow C4 Feminized in the UK. Hybrid genetics at 20% THC, known for euphoric, focused, happy effects.

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ยฃ10.98
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๐ŸŒฑGermination Promise
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About C4 Feminized

Open a jar of properly cured C4 and the first impression is unmistakably limonene โ€” a sharp citrus burst that lifts immediately, carrying notes of lemon zest, tangerine peel, and a faint sweetness underneath. Beneath this primary note, caryophyllene introduces a grounding spiciness that emerges mid-palate. This 50/50 hybrid tests at 20% THC, but the sensory journey is what distinguishes C4 from other cultivars at comparable potency. Think of it like comparing a single-origin wine to a blended table variety โ€” the numbers might overlap, but the experience diverges sharply.

Developing the Full Flavour Profile

Growing C4 for maximum terpene expression requires deliberate choices that differ from growing purely for yield. The Limonene/Caryophyllene/Linalool profile responds particularly well to organic living soil โ€” the microbial activity in a well-established no-till bed creates secondary metabolites that synthetic nutrients simply cannot replicate. UK growers have access to excellent local compost and worm casting suppliers that make this approach practical.

During the 55-65 days period, avoid foliar sprays after week 2 โ€” anything deposited on developing trichomes compromises the aromatic purity at harvest. Temperature manipulation in the final three weeks profoundly influences which terpenes dominate the cured flower: cooler night temperatures (16-18ยฐC) amplify limonene expression, whilst warmer finishes preserve the lighter linalool top notes.

The cure is where most UK growers leave flavour on the table. After a 10-14 day hang dry at 15-18ยฐC and 55-60% relative humidity (a challenge in a damp British autumn โ€” a climate-controlled room or wine fridge set to 16ยฐC works brilliantly), transfer to glass jars and burp twice daily for the first fortnight. The caryophyllene secondary notes that make this strain genuinely special only emerge after 21-28 days of jar curing. Patience transforms a good flower into a remarkable one.

Flowering: 55-65 days. Indoor yield: up to 400 g/m2. Outdoor yield: up to 500 g/plant. Rated intermediate difficulty.

Flavour, Aroma, and Experience

The sensory arc of C4 unfolds in stages. Initial inhalation at 20% THC brings a bright, almost sparkling citrus note that lifts the palate. The euphoric, focused, happy effects emerge within minutes, presenting as a simultaneous head-and-body experience. Mental clarity remains intact whilst the muscles release tension progressively. This dual action makes it adaptable โ€” a lighter dose suits afternoon tasks, a heavier dose transitions seamlessly into evening relaxation. The caryophyllene secondary terpene adds a distinct layer: a grounding warmth that prevents the experience from feeling unanchored.

Terpene Breakdown

Primary: Limonene ยท Secondary: Caryophyllene ยท Tertiary: Linalool. This particular terpene trio appears frequently in award-winning cultivars and produces a nose that most UK growers find immediately appealing when jars are first opened after curing. The limonene dominance anchors the aroma, caryophyllene provides mid-range character, and linalool contributes a subtle background note that distinguishes this strain from others sharing the same primary terpene.

Suitability and Recommendations

Who grows C4 successfully? Indoor growers seeking full control over their harvest timeline. Outdoor cultivators who want to decide exactly when flowering begins. Anyone with the space and patience to vegetate this plant to its full potential before triggering bloom. Difficulty is rated intermediate, meaning a moderate learning curve that rewards attention without demanding laboratory-grade conditions. Delivered UK-wide in discreet, unbranded packaging with germination guarantee included.

Effects

๐Ÿค—Euphoric
74% of people reported feeling Euphoric
๐Ÿง Focused
69% of people reported feeling Focused
๐Ÿ˜ŠHappy
58% of people reported feeling Happy
๐Ÿ˜ŒRelaxed
51% of people reported feeling Relaxed
๐ŸคฉCreative
50% of people reported feeling Creative
๐Ÿ˜ŽUplifted
38% of people reported feeling Uplifted
๐ŸคคHungry
34% of people reported feeling Hungry
๐Ÿ˜ดSleepy
31% of people reported feeling Sleepy
๐Ÿ˜†Giggly
24% of people reported feeling Giggly

Strain Type

Indica 50%Sativa 50%

Strain Data Sheet

๐ŸงฌTHC20% - 23% (High)
๐ŸŒฟLineageCotton Candy ร— Shishkaberry
๐Ÿ”ฌTypeFeminized Hybrid
๐ŸŒกClimateTemperate, adaptable
๐Ÿ“…HarvestLate Sept โ€“ Oct, UK outdoor (typical)
๐Ÿ“Height100 โ€“ 160 cm (typical)
โš–๏ธYieldMedium โ€“ High
๐Ÿ Yield Indoorup to 400 g/m2
๐ŸŒณYield Outdoorup to 500 g/plant
โฑFlowering Time55-65 days

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminized Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers must comply with all applicable UK Commonwealth, state, and territory legislation.
1
C4 Feminized
royalkingseeds.co.uk
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๐Ÿ”’Sealed for authenticity
๐Ÿ’งWaterproof coating
๐Ÿ›ก๏ธAluminium interior lining
๐Ÿท๏ธProtective sticker
๐Ÿ“ฑQR code verification
๐Ÿ”ขScratchable serial number

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C4 Feminized โ€” Breeder Information

Royal King Genetics

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

Stabilisation Level
F4
Generations
4+
Breeding Programme
F4 Production Line โ€” modern cross stabilisation
Stabilisation Notes โ€” What This Means for Your Grow

C4 has been progressed through four generations of phenotype hunting and selection. Vigour, flavour saturation and finishing time are all locked across the pack โ€” every plant performs to the spec sheet.

Breeding Goal

Carry C4 from F1 cross to F4 production-ready seed stock.

Selection Focus

Chosen for balanced indica/sativa expression, terpene fidelity and pack-to-pack uniformity.

Pollen / Mother Source

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

Last Batch QC Verified
18 December 2025ยท 99%+ germination