
Old School OG Feminized
Grow Old School OG Feminized in Australia. Indica genetics testing at 20% THC. Known for relaxed, sleepy, happy effects. Ships discreetly Australia-wide with germination guarantee.
Royal King Genetics — first-party test batch
Figures below are from our internal seed-lot QC and verified Australian grower submissions, not breeder marketing. Determined from a single batch tested 2026-03-13 on 325 seeds.
About Old School OG Feminized
Where you grow Old School OG in Australia matters enormously. Queensland cultivators dealing with 35°C+ summers and oppressive humidity need to approach this 76/24 indica differently than someone in Tasmania's mild maritime climate or Victoria's temperamental shoulder seasons. In tropical and subtropical zones, the dense flower architecture at 20% THC creates a genuine mould risk once relative humidity climbs past 65% — coastal QLD and northern NSW growers should prioritise airflow management above all else. Move south to Melbourne or Adelaide, and that same density becomes an asset: cooler autumn nights intensify the myrcene terpene expression and the compact frame handles wind exposure without staking.
Australian Climate Considerations
Indoor cultivators can control their environment regardless of location, but Old School OG rewards specific adjustments for Australian conditions. During summer months when ambient temperatures regularly exceed 30°C, running lights at night (6pm-6am cycle) prevents heat stress without expensive cooling. Relative humidity targets: 55-65% in veg, dropping to 40-50% once flowers form. EC targets: 1.0-1.4 during vegetative growth, stepping up to 1.6-2.0 at peak bloom. pH maintained between 5.8 and 6.3 depending on your medium.
Outdoor growers face region-specific challenges. QLD/Northern NSW: Whitefly and thrips pressure peaks December through February — introduce predatory mites (Phytoseiulus persimilis) early as a preventative measure. The high UV index accelerates trichome production but monitor for light stress on young transplants. VIC/SA/TAS: Your compressed outdoor window (November-March) suits this cultivar's 9-11 weeks bloom period, but start seeds indoors by late September to maximise vegetative growth before the December solstice. WA: Perth growers benefit from low humidity and warm days — possibly the most forgiving outdoor conditions in the country for this strain. Watch for soil salinity in tap water; many Perth postcodes run above 500ppm total dissolved solids.
Flowering: 9-11 weeks. Indoor yield: 400-500g/m². Outdoor yield: 350-500g/plant. Plant height: Compact (60-90cm). Rated intermediate difficulty.
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 Australia-wide in discreet, unbranded packaging with germination guarantee included.
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Old School OG Feminized — Breeder Information
Royal King GeneticsBred 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.
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.
Translate a clone-only recent-era cultivar to seed without losing the mother profile.
Chosen for trichome coverage, stout structure and consistent flowering time across the pack.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.