RK
Sour Tsunami cannabis seeds packaging โ€” Royal King Seeds the UK
Hybrid
THC 7%
๐ŸŽจ Creative
HybridFeminizedIn Stock

Sour Tsunami Feminized

Feminized PhotoperiodSee Lab Report โ†’

Grow Sour Tsunami Feminized in the UK. Hybrid genetics testing at 7% THC. Known for happy, relaxed, uplifted effects. Ships discreetly UK-wide with germination guarantee.

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ยฃ9.08
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๐Ÿ‡ฆ๐Ÿ‡บFree AU Delivery
๐ŸŒฑGermination Promise
๐Ÿ”’Unmarked Packaging

About Sour Tsunami Feminized

Germination & Early Veg (Days 1-14): Sour Tsunami seeds typically crack within 48 hours using the damp paper towel method and break soil by around day 3. Early growth was steady and symmetrical โ€” neither racing ahead nor lagging behind. Four well-developed nodes by day 14 with balanced internodal distance that hinted at the hybrid structure to come. Damping off is uncommon at around 70% relative humidity during this phase.

Vegetative Growth (Weeks 3-6): Responded beautifully to a simple top-and-train approach. Topping at node 4 produced six strong lateral leaders that we tied down gently, resulting in an even canopy across a 70cm x 70cm area by the time we flipped.

Flower (Weeks 1-9): This is where the 40/60 genetics of Sour Tsunami truly revealed itself. The limonene aroma appeared in week 3 of flower and intensified steadily. Trichome coverage became visually striking from week 5 onward. THC testing at 7%. Difficulty rating: intermediate.

Continuing the Grow Diary

Mid-Flower (Weeks 4-6): The transformation accelerated dramatically. Bud sites that were wispy clusters at week 3 swelled into properly defined colas. Balanced development across all bud sites. The canopy we established during veg paid dividends now โ€” eight equally developed colas rather than one dominant top and a collection of lesser branches. Trichome production was visible to the naked eye from week 4 onward.

Late Flower and Ripening (Weeks 7-9): Nutrient input dropped to plain water with a splash of molasses for the final 10 days. The limonene aroma became powerful enough that carbon filtration was essential โ€” our neighbours would have noticed otherwise. Trichomes progressed from clear to milky across the final fortnight, with amber heads appearing on sugar leaves first. A common harvest window is around 15% amber on the calyxes.

Dry and Cure (Post-Harvest): Whole-plant hang dry in a darkened room at 17ยฐC and 58% humidity for 12 days. Stems snapped cleanly rather than bending, confirming the moisture content was appropriate for jarring. After 4 weeks of glass jar curing with twice-daily burping (first 2 weeks) then daily burping (weeks 3-4), the bouquet fully developed. The caryophyllene secondary terpene became far more pronounced after curing than it was at harvest โ€” a reminder that the drying and curing process genuinely creates flavour rather than merely preserving it.

Flowering: 9 weeks. Rated intermediate difficulty. Feminised seeds.

Flavour, Aroma, and Experience

The sensory arc of Sour Tsunami unfolds in stages. Initial inhalation at 7% THC brings a bright, almost sparkling citrus note that lifts the palate. The happy, relaxed, uplifted 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. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188ยฐC) highlights the caryophyllene and linalool notes whilst keeping limonene as a foundation. Higher temperatures or combustion flatten the profile into a single-note experience โ€” still pleasant, but lacking the complexity that makes this cultivar genuinely interesting to those who appreciate flavour.

Suitability and Recommendations

Who grows Sour Tsunami 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

๐Ÿ˜ŠHappy
72% of people reported feeling Happy
๐Ÿ˜ŒRelaxed
65% of people reported feeling Relaxed
๐Ÿ˜ŽUplifted
58% of people reported feeling Uplifted
๐ŸคฉCreative
56% of people reported feeling Creative
๐Ÿค—Euphoric
47% of people reported feeling Euphoric
๐ŸคคHungry
41% of people reported feeling Hungry
๐Ÿ˜ดSleepy
38% of people reported feeling Sleepy
๐Ÿ˜†Giggly
31% of people reported feeling Giggly
๐Ÿง Focused
21% of people reported feeling Focused

Strain Type

Indica 40%Sativa 60%

Strain Data Sheet

๐ŸงฌTHC7% - 12% (Medium)
๐ŸŒฟLineageSour Diesel ร— NYC Diesel
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 Indoor400 โ€“ 500 g/mยฒ (typical)
๐ŸŒณYield Outdoor400 โ€“ 600 g/plant (typical)
โฑFlowering Time9 weeks

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
Sour Tsunami Feminized
royalkingseeds.co.uk
IG
FB
X
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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Sour Tsunami 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

F4 stabilisation on Sour Tsunami. Each generation we cull aggressively against off-types โ€” the F4 population reflects only the phenos that match the cultivar reference profile.

Breeding Goal

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

Selection Focus

Chosen for terpene profile, vigour, structure and finish-time consistency.

Pollen / Mother Source

Royal King Genetics select-mother programme โ€” pollen drawn from an internally maintained reversed-female line.

Last Batch QC Verified
31 October 2025ยท 99%+ germination