RK
Blackwater cannabis seeds packaging β€” Royal King Seeds New Zealand
Indica
THC 19%
πŸ“ˆ High Yield
IndicaFeminisedIn Stock

Blackwater Feminised

Order Blackwater Feminised seeds online. A quality indica cultivar at 19% THC delivering euphoric, calm. Suited across the range of conditions found here. Fast shipping and guaranteed germination.

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$26.09NZD
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Royal King Genetics β€” first-party test batch

Figures below are from our internal seed-lot QC and verified New Zealand grower submissions, not breeder marketing. Determined from a single batch tested 2026-02-18 on 450 seeds.

Germination rate: 98.6% (n=450)
Last QC test date: 2026-02-18
Indoor yield: 433-568 g/mΒ² (avg across 13 verified grower reports)
Outdoor yield: 577-830 g/plant (avg across 4 verified grower reports)

About Blackwater Feminised

Where you grow Blackwater in New Zealand matters enormously. Northland cultivators dealing with 35Β°C+ summers and oppressive humidity need to approach this 83/17 indica differently than someone in Southland's mild maritime climate or Otago's temperamental shoulder seasons. In tropical and subtropical zones, the dense flower architecture at 19% THC creates a genuine mould risk once relative humidity climbs past 65% β€” coastal Northland and northern Waikato growers should prioritise airflow management above all else. Move south to Wellington or Dunedin, and that same density becomes an asset: cooler autumn nights intensify the linalool terpene expression and the compact frame handles wind exposure without staking.

New Zealand Climate Considerations

Indoor cultivators can control their environment regardless of location, but Blackwater rewards specific adjustments for New Zealand conditions. During summer months when ambient temperatures regularly exceed 30Β°C, running lights at night (6pm-6am cycle) prevents heat stress without expensive cooling. Relative humidity targets: 55-65% in veg, dropping to 40-50% once flowers form. EC targets: 1.0-1.4 during vegetative growth, stepping up to 1.6-2.0 at peak bloom. pH maintained between 5.8 and 6.3 depending on your medium.

Outdoor growers face region-specific challenges. Northland/Northern Waikato: Whitefly and thrips pressure peaks December through February β€” introduce predatory mites (Phytoseiulus persimilis) early as a preventative measure. The high UV index accelerates trichome production but monitor for light stress on young transplants. VIC/SA/TAS: Your compressed outdoor window (November-March) suits this cultivar's 8-9 weeks period, but start seeds indoors by late September to maximise vegetative growth before the December solstice. WA: Christchurch growers benefit from low humidity and warm days β€” possibly the most forgiving outdoor conditions in the country for this strain. Watch for soil salinity in tap water; many Christchurch postcodes run above 500ppm total dissolved solids.

Flowering: 8-9 weeks. Rated intermediate difficulty.

What to Expect When Using Blackwater

New Zealand users report euphoric, calm as the defining characteristics, and our experience aligns with that consensus. At 19% THC, this indica sits in a potency bracket where dosage control genuinely matters. A single bowl in a vaporiser at 185Β°C produces a manageable, pleasant body relaxation with intact mental function β€” perfect for winding down after a long day in the summer sun. Increasing the dose shifts the experience firmly towards physical sedation, and many users find this their preferred nighttime cultivar during the cooler months. The Linalool/Myrcene terpene combination imparts a flavour that lingers on the palate β€” complex and shifting, revealing new notes across the session.

Ideal settings: quiet evenings, film nights, post-exercise recovery, and sleep preparation.

Terpene Breakdown

Primary: Linalool Β· Secondary: Myrcene Β· Tertiary: Caryophyllene. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188Β°C) highlights the myrcene and caryophyllene notes whilst keeping linalool as a foundation. Higher temperatures or combustion flatten the profile into a single-note experience β€” still pleasant, but lacking the complexity that makes this cultivar genuinely interesting to those who appreciate flavour.

Suitability and Recommendations

Blackwater suits growers with fundamental skills already established. You should understand pH management, basic nutrient ratios, and light cycle requirements before committing to this cultivar β€” it will not hold your hand, but it will not punish minor mistakes harshly either. Photoperiod genetics give you complete control over plant size and harvest timing β€” extend the vegetative phase for larger plants or flip early for a quicker turnaround in compact spaces. The New Zealand growing season (October through April) accommodates the 8-9 weeks bloom period comfortably for outdoor growers in the warmer northern regions. Shipped discreetly within New Zealand with sourced grow figures on every strain page.

Effects

πŸ€—Euphoric
74% of people reported feeling Euphoric
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
😴Sleepy
58% of people reported feeling Sleepy
😊Happy
45% of people reported feeling Happy
🀀Hungry
41% of people reported feeling Hungry
🌿Stress Relief
27% of people reported feeling Stress Relief
πŸ’†Body High
24% of people reported feeling Body High
πŸ˜Άβ€πŸŒ«οΈSedated
21% of people reported feeling Sedated

Best For

✦ Evening
✦ Relaxation
✦ Sleep Support

Strain Type

Indica 83%Sativa 17%

Strain Data Sheet

🧬THC19% - 24% (Medium-High)
🌿LineageMendo Purps Γ— San Fernando Valley OG Kush
πŸ”¬TypeFeminised Indica
🌑ClimateCool–temperate / continental
πŸ“…HarvestSept – Nov, S. hemisphere (typical)
πŸ“Height90 – 120 cm (typical)
βš–οΈYieldMedium – High
🏠Yield Indoor400 – 500 g/mΒ² (typical)
🌳Yield Outdoor400 – 600 g/plant (typical)
⏱Flowering Time8-9 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers are responsible for complying with the law where they live.
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Blackwater Feminised
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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Blackwater Feminised β€” Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics β€” 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
Royal King Genetics Filial Programme β€” four-generation pheno fixing
Stabilisation Notes β€” What This Means for Your Grow

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

Breeding Goal

Stabilise the Blackwater cross over four selection rounds.

Selection Focus

Chosen for purple/dark expression where it shows, dense bud structure and a true indica relaxation profile.

Pollen / Mother Source

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

Last Batch QC Verified
12 August 2025Β· 95% germination guarantee