Diablo cannabis seeds packaging — Royal King Seeds the UK
Hybrid
THC 18%
🌙 Sleep Aid
HybridFeminizedIn Stock

Diablo Feminized

Feminized PhotoperiodSee Lab Report →

Grow Diablo Feminized in the UK. Hybrid genetics at 18% THC, known for happy, relaxed, sleepy effects.

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£9.35
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About Diablo Feminized

Here is what Diablo delivers at harvest: up to 200 g/m2 per square metre indoors, up to 200 g/plant per plant outdoors in UK conditions, with resin production peaking at 18% THC. Those numbers tell a story when you work backwards through the 50-60 days window. Weight distribution across the 50-60 days cycle is pleasingly even, with a noticeable surge in the closing two weeks that rewards growers who resist harvesting prematurely. The 40/50 balance means you get both calyx stacking density and respectable trichome spread. For outdoor UK customers, the ideal harvest window lands between late September and mid-October — early enough to dodge the wet autumn finish in most regions, late enough to capture the full limonene terpene development.

Maximising Your Harvest

To reach the upper end of this strain's yield potential (up to 200 g/m2 indoors, up to 200 g/plant outdoors), focus your efforts on three critical windows during the 50-60 days period.

Window 1: The first 10 days after flowering begins. Stretch management determines canopy uniformity, which directly impacts light distribution and final yield. Moderate 30-40% stretch is typical. One round of low-stress training on the tallest shoots keeps everything level.

Window 2: Weeks 3-5 of bloom. Limonene terpene biosynthesis ramps up during this period. Maintain a day/night temperature differential of at least 6-8°C to encourage terpene accumulation — UK autumn evenings (September-October) naturally provide this swing for outdoor growers. Indoor cultivators should target 25-26°C during lights-on and 18-20°C during lights-off. Supplement with potassium-heavy bloom nutrients at EC 1.6-1.8.

Window 3: Final 10-14 days before harvest. Cease all nutrient input and flush with pH-adjusted water. Monitor trichomes daily with a 60x jeweller's loupe — harvest at 10-15% amber for a balanced effect. UK outdoor growers: this window typically falls from late September through mid-October.

Flowering: 50-60 days. Indoor yield: up to 200 g/m2. Outdoor yield: up to 200 g/plant. Rated intermediate difficulty.

Flavour, Aroma, and Experience

The sensory arc of Diablo unfolds in stages. Initial inhalation at 18% THC brings a bright, almost sparkling citrus note that lifts the palate. The happy, relaxed, sleepy 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 — 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 · Secondary: Caryophyllene · 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 Diablo 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

😊Happy
72% of people reported feeling Happy
😌Relaxed
65% of people reported feeling Relaxed
😴Sleepy
65% of people reported feeling Sleepy
🤩Creative
56% of people reported feeling Creative
🤗Euphoric
47% of people reported feeling Euphoric
😎Uplifted
38% of people reported feeling Uplifted
🤤Hungry
34% of people reported feeling Hungry
😆Giggly
31% of people reported feeling Giggly
🧠Focused
21% of people reported feeling Focused

Strain Type

Indica 40%Sativa 50%

Strain Data Sheet

🧬THC18% - 21% (Medium-High)
🌿LineageBlueberry × Grapefruit × South African Landrace
🔬TypeFeminized Hybrid
🌡ClimateTemperate, adaptable
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height100 – 160 cm (typical)
⚖️YieldMedium
🏠Yield Indoorup to 200 g/m2
🌳Yield Outdoorup to 200 g/plant
Flowering Time50-60 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.
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Diablo Feminized
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Diablo Feminized — 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
F3
Generations
3+
Breeding Programme
F3 Refinement Programme — three-generation selection
Stabilisation Notes — What This Means for Your Grow

Diablo runs through our F3 programme. Most of the pack expresses the target trichome production cleanly; the F3-to-F4 cycle is where we close out the last remaining off-types.

Breeding Goal

Stabilise Diablo across three rounds toward F4 production-ready stock.

Selection Focus

Chosen for trichome density, bud structure and the hybrid trait balance the cross was engineered for.

Pollen / Mother Source

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

Last Batch QC Verified
17 June 2026· 99%+ germination