
Platinum GSC Feminised
Platinum GSC Feminised — premium hybrid cannabis seeds suited to Irish growing conditions. 23% THC with euphoric, happy, relaxed effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.
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 2026-09-11 on 350 seeds at 20-23°C.
About Platinum GSC Feminised
Days 1-14, germination and early veg. Platinum GSC generally cracks within about two days on damp kitchen paper and is above the medium by day three. The first fortnight came in even, without either racing or stalling. Four solid nodes by day 14 and the spacing that suggests the frame it will build. Keep the humidity near 70% and damping off stops being a concern.
Weeks 3-6, veg. A top at node four and a few ties produced six even leaders and a flat canopy across a 70cm square by the time it was flipped.
Bloom, weeks 1-9. The 60/40 character came through clearly. Myrcene was noticeable by week three and kept building; resin was obvious without a loupe from about week five. Indoor yield: 350-400 g/m2. Height: up to 120 cm. Tested at 23%. Rated intermediate.
The rest of the run
Weeks 4-6, mid-bloom. Loose clusters from week three closed up into defined colas. Development stayed even across the canopy, which is what the veg training was for: eight comparable colas instead of one dominant top and a set of stragglers.
Ripening, weeks 7-9. Plain water for the last ten days. Myrcene was strong enough by then that carbon filtration was not optional in a terraced house. Heads went clear to milky over the final fortnight, amber showing on sugar leaves first, and around 15% amber on the calyxes is a defensible place to stop.
Drying and curing. Hung whole in the dark at 17°C and 58% humidity for twelve days, both held by a dehumidifier because an October room here will hold neither. Stems snapped instead of bending, which is the only test worth trusting. Four weeks in glass after that. The 350-400 g/m2 figure held up. Limonene was far more present after the cure than at harvest — the cure makes flavour, it does not merely preserve it.
Flowering: 8-9 weeks. Indoor yield: 350-400 g/m2. Outdoor yield: 1200-2000 g/plant. Plant height: up to 120 cm. Rated intermediate difficulty. Feminised seeds.
What Platinum GSC is like in practice
The catalogue lists euphoric, 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 60/40 split means the direction is set by the amount rather than fixed by the plant. The Myrcene and Limonene together leave earth and faint sweetness, with fruit at the end.
Suited to most occasions, with the dose doing the steering.
Terpene breakdown
Primary: Myrcene · Secondary: Limonene · Tertiary: Pinene. The three shift relative to each other across the cure. Straight off the dry the myrcene dominates; three or four weeks sealed in glass at 16-18°C and the pinene underneath comes up to meet it. Vaporising between 180°C and 195°C catches the widest span, because heat takes the lighter pinene molecules first.
Who it suits
Platinum GSC 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 8-9 weeks fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.
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Platinum GSC Feminised — 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.
A mid-2000s dispensary clone-only original brought to seed via a three-generation backcross programme. Vigour, terpene character and structural balance are all locked. The pack runs true to the cut your mate grew off a clone last season.
Translate a clone-only mid-2000s dispensary cultivar to seed without losing the mother profile.
Chosen for hybrid frame, clean terpene expression and consistent yield across the population.
Royal King Genetics elite-cut archive — pollen from a maintained S1 line of the original elite mother.