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

Alien OG Feminised

Alien OG Feminised — premium hybrid cannabis seeds suited to Irish growing conditions. 23% THC with focused, happy, relaxed effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.

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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified Irish grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-09 on 500 seeds at 20-23°C.

Germination rate: 97.3% (n=500)
Last QC test date: 2026-09-09
Indoor yield: 442-566 g/m² (avg across 6 verified grower reports)
Outdoor yield, Ireland: 438-624 g/plant (avg across 9 verified grower reports)

About Alien OG Feminised

Everything about Alien OG at harvest follows from one decision, which is when you stop. The figures are 16 to 540 g/m2 indoors and 16 to 510 g/plant outdoors, with resin filling towards 23% THC. The 50/50 balance gives steady gain with a lift in the closing fortnight. Outdoors, aim to be finished by mid-October rather than hoping for a dry third week of it.

Where the weight is won

Three parts of the 55-65 days of bloom account for most of the difference between a good result and an average one on a plant rated 16 to 540 g/m2 indoors and 16 to 510 g/plant outdoors.

The stretch, days 1-10 after the flip. Canopy height set here decides how evenly light lands for the rest of the run. Around a third is usual. A single pass of training across the tallest shoots keeps the top flat.

Weeks three to five. Caryophyllene production climbs through this stretch and responds to a 6-8°C gap between lights-on and lights-off. Outdoors an Irish September provides that without help; indoors it has to be built, at roughly 25°C by day and 18-20°C at night. Bloom feed goes potassium-forward around EC 1.6-1.8.

The final fortnight. Feeding stops, plain pH-corrected water goes on, and the loupe comes out daily. Ten to fifteen per cent amber sits in the middle of its range. Outdoors, that falls between late September and mid-October, and the forecast gets a say.

Flowering: 55-65 days. Indoor yield: 16 to 540 g/m2. Outdoor yield: 16 to 510 g/plant. Plant height: 90 - 120 cm. Rated medium difficulty.

What Alien OG is like in practice

The catalogue lists focused, happy, relaxed, and that matches what growers here report back. At 23% THC this hybrid sits where the balance is the argument for it. Small doses stay functional, larger ones relax properly, and the 50/50 split means the direction is set by the amount rather than fixed by the plant. The Caryophyllene and Myrcene together leave warmth and spice, drying on the exhale.

Suited to most occasions, with the dose doing the steering.

Terpene breakdown

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Humulene. Temperature decides how much of this profile survives. Low vaporisation at 180-188°C keeps myrcene and humulene audible over the caryophyllene; run it hotter, or burn it, and all three collapse into one note that is pleasant enough and tells you nothing.

Who it suits

Alien OG suits growers with the fundamentals in place. Understand pH, rough nutrient ratios and a light cycle before committing to it; it asks for competence rather than expertise. Photoperiod genetics leave plant size and harvest date under your control — veg longer for a bigger plant, or flip early when the ceiling is low. A bloom of 55-65 days fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

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

Best For

✦ Anytime
✦ Depression
✦ Pain
✦ Stress

Strain Type

Indica 50%Sativa 50%

Strain Data Sheet

🧬THC23% - 26% (High)
🌿LineageAlien Kush × Tahoe OG Kush
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestSept – Nov, S. hemisphere (typical)
📏Height90 - 120 cm
⚖️YieldMedium – High
🏠Yield Indoor16 to 540 g/m2
🌳Yield Outdoor16 to 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 are responsible for complying with the law where they live.
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Alien OG Feminised
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🛡️Aluminium interior lining
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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
12 September 2026· 99%+ germination