
Sweet Island Feminised
Sweet Island Feminised — premium sativa cannabis seeds suited to Irish growing conditions. 15% THC with euphoric, creative, calm 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 2026-09-15 on 200 seeds at 20-23°C.
About Sweet Island Feminised
Everything about Sweet Island at harvest follows from one decision, which is when you stop. The figures are 600 g/m2 indoors and 600 g/plant outdoors, with resin filling towards 15% THC. A 19/81 plant lays its weight down gradually instead of in a rush, so there is no single fattening window to aim at. The temptation in an Irish September is to cut early because the forecast looks poor; that costs more than the weather would have.
Where the weight is won
Three parts of the 8-10 weeks of bloom account for most of the difference between a good result and an average one on a plant rated 600 g/m2 indoors and 600 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. Half again on top of veg height is normal. Supercrop anything that breaks the line inside the first week, or you spend the remaining weeks lighting one branch properly.
Weeks three to five. Terpinolene 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. Five to ten per cent amber keeps the clarity intact. Outdoors, that falls between late September and mid-October, and the forecast gets a say.
Flowering: 8-10 weeks. Indoor yield: 600 g/m2. Outdoor yield: 600 g/plant. Plant height: 120 cm. Rated easy difficulty.
What Sweet Island is like in practice
The catalogue lists euphoric, creative, calm, and that matches what growers here report back. At 15% THC this sativa sits where there is a usable window rather than a cliff. At 175-185°C the first effect is lift and mental energy, which suits company, a long walk, or work that benefits from it. The body stays light, so it is a genuine daytime option for anyone with a tolerance. The Terpinolene and Limonene together leave a finish that keeps shifting across a session.
Suited to company, creative work, and getting out of the house.
Terpene breakdown
Primary: Terpinolene · Secondary: Limonene · Tertiary: Ocimene. This is a combination that turns up repeatedly in cultivars people rate, and it is usually what gets commented on when a jar is opened for the first time after a proper cure. Terpinolene anchors it, limonene holds the middle, and ocimene sits behind both — the last of those being what separates this from other strains leading on the same terpene.
Who it suits
Sweet Island 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 8-10 weeks fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.
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Sweet Island 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.
Four rounds of filial stabilisation on the Sweet Island cross. The high-energy terpene expression expression sits uniform; pheno-to-pheno yield variation runs within ±10% of the published numbers.
Carry Sweet Island from F1 cross to F4 production-ready seed stock.
Chosen for terpene saturation, sativa vigour and a workable finish time despite long-flowering genetics.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.