RK
Critical Kush cannabis seeds packaging β€” Royal King Seeds 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£10.96
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Royal King Genetics β€” 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 2026-09-06 on 175 seeds.

Germination rate: 98.9% (n=175)
Last QC test date: 2026-09-06
Indoor yield: 498-616 g/mΒ² (avg across 6 verified grower reports)
Outdoor yield: 610-868 g/plant (avg across 5 verified grower reports)

About Critical Kush Auto

Will Critical Kush finish outdoors in Britain? Yes, within the April to October season. The habit is compact enough to stay below a fence line, and the dense flower structure puts real weight on a small frame β€” which is also the reason airflow matters more here than it would in a drier place. Flowering runs 70-80 days seed to harvest, which puts harvest in September or October for most of the country.

What yield is realistic? 450-550 g/m2 indoors is achievable with competent LED lighting and attention to feeding. Outdoors, 180-250 g/plant is realistic in 50 litre pots or in prepared ground with full sun β€” and "full sun" is doing a lot of work in that sentence at these latitudes, so the position you pick in the garden matters more than the pot you buy. At 21% THC with a caryophyllene-forward profile, the return on the effort is sound.

Is it forgiving? Reasonably. Anyone comfortable with pH, a feed schedule and a light timer will get a good result. It will not hold your hand, but it will not punish one missed watering either.

Further questions we get asked about Critical Kush

Which medium? For flavour, peat-free soil cut with about 30% perlite and amended slowly β€” fish, blood and bone, rock phosphate, seaweed meal, all of it available at any British garden centre. For weight, coco with fertigation at EC 1.4-1.8 through bloom. This indica performs in both; the choice is about what you want out of it.

How does it handle a British summer? The dense foliage shades itself, which helps. Above 30Β°C growth stalls but the plant does not fold. Mulch the root zone and water before seven in the morning and heat stress stops being a factor in nearly every part of the country. The more common British problem is the opposite one: a cold, wet July that never lets the plant dry out between waterings.

When do I switch to bloom feed? Inside the first week of visible pistils. The 87/13 balance shifts its demand quickly at the transition β€” phosphorus and potassium up, nitrogen down. Soil growers can top-dress with guano and sulphate of potash; coco and hydro should move to a low-nitrogen bloom formula straight away.

Indoors or outdoors? Both work, for different reasons. Indoors you own the flowering environment completely. Outdoors, across the April to October season, the plant gets a light intensity no domestic LED matches and can reach 180-250 g/plant β€” at the price of accepting whatever the autumn does. 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 effect

Critical Kush arrives in stages. The first draw at 21% THC brings dry pepper that registers at the back of the throat. The euphoric, calm 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 β€” 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 Β· Secondary: Myrcene Β· Tertiary: Bisabolol. These three build an aroma that keeps moving through the cure. Fresh off the dry it leads with caryophyllene; after three or four weeks sealed in glass at 16-18Β°C the bisabolol underneath comes up and the whole thing gains a layer. Vaporising between 180Β°C and 195Β°C catches the widest span of them, since the lighter bisabolol molecules are the first thing heat destroys.

Who it suits

Who does well with Critical Kush? Balcony growers in flats from Brighton to Glasgow. Anyone wanting one quick outdoor crop rather than a long project. Indoor growers short of headroom. The autoflowering genetics run on their own clock, so there is no light schedule to manage, no anxiety about light leaks, and harvest comes 10-12 weeks from germination whatever the season is doing. Difficulty is rated intermediate, which means a moderate learning curve that rewards attention without demanding a laboratory.

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 United Kingdom 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
4 September 2026Β· 99%+ germination