RK
Killer Grape cannabis seeds packaging β€” Royal King Seeds the UK
Indica
THC 8%
πŸŒ™ Sleep Aid
IndicaFeminizedIn Stock

Killer Grape Feminized

Feminized PhotoperiodSee Lab Report β†’

Grow Killer Grape Feminized in the UK. Indica genetics at 8% THC, known for relaxed, energetic, calm effects.

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Β£8.94
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About Killer Grape Feminized

Where you grow Killer Grape in the UK matters, but less than when. Britain has one temperate maritime climate and a real north-south gradient: the south coast runs a season roughly a fortnight longer at each end than Scotland and upland Wales. Outdoors the limiting factor is not heat, it is the wet finish β€” September and October rain sitting on dense flower is what starts botrytis, and it is the most common reason a UK outdoor crop is lost. That makes the 8-9 weeks flowering window and bud structure the two figures worth checking before anything else. Indoors none of it applies: you set the daylength, the temperature and the humidity, and Killer Grape can be grown anywhere in the country on its merits.

UK growers face a fairly consistent set of pressures. The damp late season is the main one: botrytis in dense flower from September onwards, which is best answered with open bud structure and steady airflow rather than treatment. Indoors, spider mite and thrips are the usual arrivals, and humidity above 60% in late bloom is what turns a small problem into a lost crop. Outdoors in a wet spring, slugs take more seedlings than any insect.

Flavour, Aroma, and Experience

The sensory arc of Killer Grape unfolds in stages. Initial inhalation at 8% THC brings a warm peppery spice that tingles at the back of the throat. The relaxed, energetic, calm effects emerge within minutes, beginning as a pleasant heaviness behind the eyes that migrates downward through the shoulders, chest, and limbs. By the fifteen-minute mark, a deep physical stillness sets in β€” not sedation exactly, but a reluctance to move that makes the couch remarkably appealing. Duration runs 2-3 hours at moderate doses. The myrcene secondary terpene adds a distinct layer: additional body depth that reinforces the physical dimension.

Terpene Breakdown

Primary: Caryophyllene Β· Secondary: Myrcene Β· Tertiary: Bisabolol. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188Β°C) highlights the myrcene and bisabolol notes whilst keeping caryophyllene 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

Who grows Killer Grape 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

😌Relaxed
72% of people reported feeling Relaxed
πŸ€‘Energetic
64% of people reported feeling Energetic
🧘Calm
60% of people reported feeling Calm
😴Sleepy
58% of people reported feeling Sleepy
😊Happy
45% of people reported feeling Happy
🀀Hungry
41% of people reported feeling Hungry
πŸ€—Euphoric
33% of people reported feeling Euphoric
🌿Stress Relief
20% of people reported feeling Stress Relief
πŸ’†Body High
17% of people reported feeling Body High

Strain Type

Indica 86%Sativa 14%

Strain Data Sheet

🧬THC8% - 11% (Medium)
🌿LineageKiller Queen Γ— Querkle
πŸ”¬TypeFeminized Indica
🌑ClimateCool–temperate / continental
πŸ“…HarvestLate Sept – Oct, UK outdoor (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
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
Killer Grape Feminized
royalkingseeds.co.uk
IG
FB
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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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Killer Grape Feminized 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
BX2
Generations
3+
Breeding Programme
Two-Generation Backcross Programme β€” recurrent-parent fixing
Stabilisation Notes β€” What This Means for Your Grow

Killer Grape carries clone-derived parents from the mid-2010s. We backcrossed twice to the dominant parent (BX2) to weld cut-specific traits into seed-stable form. Vigour and tight finish window run uniform across the population.

Breeding Goal

Fix parent-cut traits in Killer Grape without narrowing the population too far.

Selection Focus

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

Pollen / Mother Source

Royal King Genetics in-house mother stock β€” pollen taken from a sibling male drawn from the same selected pheno population.

Last Batch QC Verified
17 February 2026Β· 99%+ germination