RK
Critical Kush cannabis seeds packaging β€” Royal King Seeds the UK
IndicaAuto
THC 21%
😊 Beginner Pick
IndicaAutoflowerIn Stock

Critical Kush Auto

AutoflowerSee Lab Report β†’

Grow Critical Kush Auto in the UK. Indica genetics at 21% THC, known for euphoric, calm effects.

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Β£11.38
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About Critical Kush Auto

Can I grow Critical Kush outdoors in the UK? Absolutely. This 87/13 indica is well-suited to the UK outdoor season running April through October. The compact growth habit means it will not tower above your fence line, and the dense flower structure packs serious weight into a manageable frame. Flowering takes 70-80 days seed to harvest, placing your harvest window squarely in September or October for most UK latitudes.

What kind of yield should I realistically expect? Indoor growers pulling 450-550 g/m2 is achievable with decent LED lighting and attentive feeding. Outdoors, 180-250 g/plant per plant is realistic in 50+ litre pots or directly in prepared garden soil with full sun exposure. At 21% THC and a caryophyllene-forward terpene profile, the quality-to-effort ratio makes Critical Kush genuinely worthwhile.

Is this strain forgiving for newer growers? Reasonably so. A grower with basic knowledge of pH, feeding schedules, and light cycles will manage fine. It is not the most forgiving plant if you neglect it entirely, but it will not collapse at the first missed watering either.

More Questions UK Growers Ask About Critical Kush

What growing medium works best for this strain? For maximum flavour complexity, organic soil blended with 30% perlite and enriched with slow-release amendments (blood, fish and bone, rock phosphate, kelp meal β€” all readily available at a garden centre or your local hydroponics shop). For maximum yield, coco coir with automated fertigation at EC 1.4-1.8 during bloom. Both approaches produce excellent results with this indica genetics.

How does it handle British summer heat? The dense foliage provides natural self-shading, which helps. In a UK heatwave above 30Β°C, growth slows noticeably but the plant does not collapse. Mulching the root zone and watering in the early morning (before 7am) prevents heat stress in most UK locations.

When should I start feeding bloom nutrients? Within the first week of visible pistil formation. This cultivar's 87/13 genetics shifts its nutritional demand rapidly at the transition. Phosphorus and potassium uptake increases noticeably, whilst nitrogen demand drops. An organic top-dress of bat guano and sulphate of potash works well for soil growers; hydro and coco growers should switch to a bloom-ratio formula (low N, high PK) immediately.

Indoor or outdoor β€” which is better for this strain? Both work. Indoor gives you control over the 70-80 days seed to harvest environment. Outdoor in the UK growing season (April-October) lets the plant reach its full 180-250 g/plant potential with natural sunlight intensity that even expensive LEDs struggle to match. Flowering: 70-80 days seed to harvest. Indoor yield: 450-550 g/m2. Outdoor yield: 180-250 g/plant. Plant height: 70-90 cm. Rated intermediate difficulty.

Flavour, Aroma, and Experience

The sensory arc of Critical Kush unfolds in stages. Initial inhalation at 21% THC brings a warm peppery spice that tingles at the back of the throat. The euphoric, 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. Together these three compounds construct an aromatic signature that evolves throughout the curing process. Freshly dried flower leads with caryophyllene presence, but after three to four weeks in sealed glass jars at 16-18Β°C, the bisabolol undertone strengthens and the overall bouquet develops a layered complexity. Vaporisation between 180Β°C and 195Β°C captures the broadest spectrum of these terpenes β€” higher temperatures degrade the more volatile bisabolol molecules first.

Suitability and Recommendations

Who grows Critical Kush successfully? Balcony growers in flats from Brighton to Glasgow. Regional cultivators wanting a quick-turnaround outdoor crop. Indoor growers with limited headroom in small tents. The autoflowering genetics run on their own internal clock β€” no light schedule adjustments, no stress about light leaks, and harvest arrives 10-12 weeks after germination regardless of the season. 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

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

Strain Type

Indica 87%Sativa 13%

Strain Data Sheet

🧬THC21% - 24% (High)
🌿LineageCritical Mass Γ— OG Kush
πŸ”¬TypeAutoflower Indica
🌑ClimateAll climates (adaptable)
πŸ“…Harvestβ‰ˆ 10 – 11 weeks from seed (typical)
πŸ“Height70-90 cm
βš–οΈYieldHigh
🏠Yield Indoor450-550 g/m2
🌳Yield Outdoor180-250 g/plant
⏱Flowering Time70-80 days seed to harvest

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
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
Critical Kush Auto
royalkingseeds.co.uk
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X
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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Critical Kush Auto 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
F5
Generations
5+
Breeding Programme
Autoflower Stabilisation (F5) β€” ruderalis trait fixing
Stabilisation Notes β€” What This Means for Your Grow

Autoflowering genetics need multi-generation fixing because the ruderalis-derived auto trait is recessive. Critical Kush sits at F5 β€” every plant in the pack autoflowers reliably and finishes inside a tight window.

Breeding Goal

Lock the autoflower trait in Critical Kush through five generations of selection.

Selection Focus

Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.

Pollen / Mother Source

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

Last Batch QC Verified
25 July 2026Β· 99%+ germination