Old School OG cannabis seeds packaging — Royal King Seeds the UK
Indica
THC 20%
🌙 Sleep Aid
IndicaFeminizedIn Stock

Old School OG Feminized

Feminized PhotoperiodSee Lab Report →

Grow Old School OG Feminized in the UK. Indica genetics at 20% THC, known for relaxed, sleepy, happy effects.

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£10.98
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About Old School OG Feminized

Where you grow Old School OG in the UK matters, but less than when. Britain has one temperate maritime climate and a real north-south gradient: the south coast runs a season roughly a fortnight longer at each end than Scotland and upland Wales. Outdoors the limiting factor is not heat, it is the wet finish — September and October rain sitting on dense flower is what starts botrytis, and it is the most common reason a UK outdoor crop is lost. That makes the 55-65 days flowering window and bud structure the two figures worth checking before anything else. Indoors none of it applies: you set the daylength, the temperature and the humidity, and Old School OG can be grown anywhere in the country on its merits.

UK growers face a fairly consistent set of pressures. The damp late season is the main one: botrytis in dense flower from September onwards, which is best answered with open bud structure and steady airflow rather than treatment. Indoors, spider mite and thrips are the usual arrivals, and humidity above 60% in late bloom is what turns a small problem into a lost crop. Outdoors in a wet spring, slugs take more seedlings than any insect.

Flavour, Aroma, and Experience

The sensory arc of Old School OG unfolds in stages. Initial inhalation at 20% THC brings a deep, musky earthiness that coats the palate. The relaxed, sleepy, happy 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 — not sedation exactly, but a reluctance to move that makes the couch remarkably appealing. Duration runs 2-3 hours at moderate doses. The caryophyllene secondary terpene adds a distinct layer: a grounding warmth that prevents the experience from feeling unanchored.

Terpene Breakdown

Primary: Myrcene · Secondary: Caryophyllene · Tertiary: Linalool. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188°C) highlights the caryophyllene and linalool notes whilst keeping myrcene as a foundation. Higher temperatures or combustion flatten the profile into a single-note experience — still pleasant, but lacking the complexity that makes this cultivar genuinely interesting to those who appreciate flavour.

Suitability and Recommendations

Who grows Old School OG 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

😌Relaxed
72% of people reported feeling Relaxed
😴Sleepy
72% of people reported feeling Sleepy
😊Happy
58% of people reported feeling Happy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Strain Type

Indica 76%Sativa 24%

Strain Data Sheet

🧬THC20% - 24% (High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminized Indica
🌡ClimateCool–temperate / continental
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height90 – 120 cm (typical)
⚖️YieldMedium
🏠Yield Indoorup to 300 g/m2
🌳Yield Outdoorup to 450 g/plant
Flowering Time55-65 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.
1
Old School OG Feminized
royalkingseeds.co.uk
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Old School OG 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
BX3
Generations
4+
Breeding Programme
Royal King Genetics Backcross Line — BX3 clone-only restabilisation
Stabilisation Notes — What This Means for Your Grow

BX3 is the credible stabilisation point for a clone-only recent-era cultivar. We worked Old School OG through three backcross generations to recreate the elite cut in seed form. A sibling male pollinates the mother each cycle to drive trait fixation.

Breeding Goal

Translate a clone-only recent-era cultivar to seed without losing the mother profile.

Selection Focus

Chosen for trichome coverage, stout structure and consistent flowering time across the pack.

Pollen / Mother Source

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

Last Batch QC Verified
24 August 2026· 99%+ germination