Blackberry Kush cannabis seeds packaging — Royal King Seeds UK
Indica
THC 18%
🌙 Sleep Aid
IndicaFeminisedIn Stock

Blackberry Kush Feminised

Feminised PhotoperiodSee Lab Report →

Grow Blackberry Kush Feminised in the UK. Indica genetics at 18% THC, known for happy, relaxed, sleepy effects.

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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified UK grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-02 on 125 seeds.

Germination rate: 96.5% (n=125)
Last QC test date: 2026-09-02
Indoor yield: 448-598 g/m² (avg across 8 verified grower reports)
Outdoor yield: 588-900 g/plant (avg across 3 verified grower reports)

About Blackberry Kush Feminised

Where you grow Blackberry Kush in Britain matters less than when you start it. This is one temperate maritime climate with a real north-south gradient: the south coast opens and closes its season around a fortnight either side of the central belt or upland Wales. Heat is almost never the constraint here. The wet finish is — rain sitting in dense flower through late September and October is what starts botrytis, and it ends more British outdoor crops than every insect on the plot combined. That puts the 49-56 days (indoor) flowering window and the bud structure ahead of everything else on this page. Under lights none of it applies: daylength, temperature and humidity are yours to set, and Blackberry Kush can be run anywhere in the country on its merits.

The pressures on a British grow are fairly predictable. Damp is the first of them: botrytis in dense flower from September on, answered with open bud structure and moving air rather than with a spray. Indoors it is spider mite and thrips that arrive, and humidity above 60% in late bloom is what turns a contained problem into a lost room. Outdoors in a wet spring the slugs take more seedlings than every insect put together, and they do it overnight.

Flavour, aroma and effect

Blackberry Kush arrives in stages. The first draw at 18% THC brings dry pepper that registers at the back of the throat. The happy, relaxed, sleepy character follows within minutes, starting as weight behind the eyes and working down through the shoulders and chest. By about a quarter of an hour it has become a physical stillness — not sedation so much as a strong disinclination to get up. Two to three hours at a moderate dose. The myrcene underneath adds body and depth beneath the rest.

Terpene breakdown

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Bisabolol. How this profile survives the journey from flower to vapour depends on temperature. Low vaporisation, 180-188°C, keeps the myrcene and bisabolol audible over the caryophyllene base. Run it hotter, or burn it, and the three collapse into one note — pleasant enough, but none of the complexity that made it worth choosing.

Who it suits

Who does well with Blackberry Kush? Indoor growers who want the timeline under their own control. Outdoor growers who want to choose when flowering starts. Anyone with the room and the patience to veg it properly before flipping. Difficulty is rated intermediate, which means a moderate learning curve that rewards attention without demanding a laboratory.

Effects

😊Happy
72% of people reported feeling Happy
😌Relaxed
65% of people reported feeling Relaxed
😴Sleepy
65% of people reported feeling Sleepy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Strain Type

Indica 80%Sativa 20%

Strain Data Sheet

🧬THC18% - 22% (Medium-High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Indica
🌡ClimateCool–temperate / continental
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height90 – 120 cm (typical)
⚖️YieldMedium – High
🏠Yield Indoor500 g/m²
🌳Yield Outdoor500 - 600 g/plant
⏱Flowering Time49-56 days (indoor)

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 must comply with all applicable United Kingdom legislation.
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Blackberry Kush Feminised
royalkingseeds.co.uk
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Blackberry Kush Feminised — Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics — 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
BX3
Generations
4+
Breeding Programme
Royal King Genetics Backcross Line — BX3 clone-only restabilisation
Stabilisation Notes — What This Means for Your Grow

Three rounds of backcrossing to the parental line have welded the Blackberry Kush cut into the population. The purple expression that made the original mother famous now expresses across the whole pack — not just in one or two lucky phenos.

Breeding Goal

Reproduce the original Blackberry Kush mother in pack-to-pack seed stock.

Selection Focus

Chosen for indica vigour, compact bud formation and a reliable finish window.

Pollen / Mother Source

Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.

Last Batch QC Verified
22 September 2026· 99%+ germination