Alien OG cannabis seeds packaging — Royal King Seeds UK
Hybrid
THC 23%
📈 High Yield
HybridFeminisedIn Stock

Alien OG Feminised

Feminised PhotoperiodSee Lab Report →

Alien OG Feminised — hybrid cannabis seeds suited to UK growing conditions. 23% THC with focused, happy, relaxed effects. Fast, discreet UK delivery.

Select Pack Size
£10.57
1
🇬🇧Free AU Delivery
🌱Germination Promise
🔒Unmarked Packaging
⚗

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 2026-09-23 on 200 seeds.

Germination rate: 96.1% (n=200)
Last QC test date: 2026-09-23
Indoor yield: 435-560 g/m² (avg across 15 verified grower reports)
Outdoor yield: 557-872 g/plant (avg across 10 verified grower reports)

About Alien OG Feminised

Read Alien OG backwards from the harvest: 450-540 g/m² under lights, 450-510 g/plant outdoors, with resin filling out towards 23% THC. Weight goes on evenly across the 55-65 days of bloom, with a clear surge in the last two weeks that rewards leaving the plant alone. The 50/50 split gives you calyx density and an even spread of resin rather than one at the cost of the other. Outdoors, late September to mid-October is the window that misses the wettest of the finish across most of the country while still letting the caryophyllene arrive.

Getting the weight out of this plant

Three stretches of the 55-65 days of bloom decide whether you reach the top of this strain's range (450-540 g/m² indoors, 450-510 g/plant outdoors). The rest is maintenance.

The first ten days of flower. What the plant does during the stretch sets canopy height, and canopy height sets how evenly the light lands. Somewhere around a third is typical. One pass of low-stress training over the tallest shoots keeps the top flat.

Weeks three to five. Caryophyllene production climbs through here, and it responds to a day-night temperature gap of 6-8°C. British autumn nights hand that to outdoor growers for free from September; indoors you have to build it, at roughly 25-26°C lights-on and 18-20°C lights-off. Bloom feed goes potassium-heavy around EC 1.6-1.8.

The last ten to fourteen days. Stop feeding and run pH-corrected water. Check trichomes daily under a 60x loupe — cut at 10-15% amber for the middle of the range. Outdoors that lands between late September and mid-October across most of Britain, and the weather forecast should get a vote.

Flowering: 55-65 days. Indoor yield: 450-540 g/m². Outdoor yield: 450-510 g/plant. Plant height: 90-120 cm. Rated intermediate difficulty.

What Alien OG is actually like

Growers report focused, happy, relaxed as the defining characteristics and our own notes agree. At 23% THC this hybrid sits where the balance is the selling point. Taken small it stays functional; taken larger it relaxes properly. The ${indica}/${sativa} split means the direction is set by how much you take rather than fixed by the genetics. The Caryophyllene/Myrcene pairing leaves warmth and spice that dries slightly on the exhale.

Best suited to most occasions — the dose does the steering.

Terpene breakdown

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Humulene. How this profile survives the journey from flower to vapour depends on temperature. Low vaporisation, 180-188°C, keeps the myrcene and humulene 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

Alien OG suits growers with the basics in place. Understand pH, rough nutrient ratios and light cycles before you commit to it; it asks for competence rather than expertise. Photoperiod genetics leave plant size and harvest date under your control — veg longer for bigger plants, or flip early when space is short. The April to October season accommodates a bloom of 55-65 days comfortably for outdoor growers across the country.

Effects

🧠Focused
76% of people reported feeling Focused
😊Happy
65% of people reported feeling Happy
😌Relaxed
58% of people reported feeling Relaxed
🤩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
😴Sleepy
31% of people reported feeling Sleepy
😆Giggly
24% of people reported feeling Giggly

Strain Type

Indica 50%Sativa 50%

Strain Data Sheet

🧬THC23% - 26% (High)
🌿LineageAlien Kush × Tahoe OG Kush
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height90-120 cm
⚖️YieldMedium – High
🏠Yield Indoor450-540 g/m²
🌳Yield Outdoor450-510 g/plant
⏱Flowering Time55-65 days

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.
1
Alien OG Feminised
royalkingseeds.co.uk
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

Related Strains

Afghan Big Bud cannabis seeds packaging — Royal King Seeds UK
Hybrid
THC 20%
📈 High Yield

Afghan Big Bud Feminised

FocusedCalm
▼
£8.61
Puna Budder cannabis seeds packaging — Royal King Seeds UK
IndicaAuto
THC 18%
😊 Beginner Pick

Puna Budder Auto

RelaxedEuphoricCreative
▼
£10.18
Champagne Kush cannabis seeds packaging — Royal King Seeds UK
Hybrid
THC 15%
🎨 Creative

Champagne Kush Feminised

HappyTalkativeUplifted
▼
£11.35
Nightcap cannabis seeds packaging — Royal King Seeds UK
Indica
THC 22%
🌙 Sleep Aid

Nightcap Feminised

RelaxedFocusedCalm
▼
£11.74

Alien OG 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
Three-Generation Backcross Programme — recurrent-parent fixing
Stabilisation Notes — What This Means for Your Grow

Three rounds of backcrossing to the parental line have welded the Alien OG cut into the population. The flavour saturation 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 Alien OG mother in pack-to-pack seed stock.

Selection Focus

Chosen for balanced indica/sativa expression, terpene fidelity and pack-to-pack uniformity.

Pollen / Mother Source

Royal King Genetics elite-cut archive — pollen from a maintained S1 line of the original elite mother.

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