
Blue Zushi Feminised
Blue Zushi Feminised — premium hybrid cannabis seeds suited to Irish growing conditions. 28% THC with relaxed, focused, 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 2026-09-21 on 425 seeds at 20-23°C.
About Blue Zushi Feminised
Everything about Blue Zushi at harvest follows from one decision, which is when you stop. The figures are 500 g/m2 indoors and 500-750 g/plant outdoors, with resin filling towards 28% THC. The 35/65 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 8-9 weeks of bloom account for most of the difference between a good result and an average one on a plant rated 500 g/m2 indoors and 500-750 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: 8-9 weeks. Indoor yield: 500 g/m2. Outdoor yield: 500-750 g/plant. Plant height: Up to 130 cm. Rated easy difficulty.
What Blue Zushi is like in practice
The catalogue lists relaxed, focused, calm, and that matches what growers here report back. At 28% THC this hybrid sits where the balance is the argument for it. Small doses stay functional, larger ones relax properly, and the 35/65 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. The three shift relative to each other across the cure. Straight off the dry the caryophyllene dominates; three or four weeks sealed in glass at 16-18°C and the humulene underneath comes up to meet it. Vaporising between 180°C and 195°C catches the widest span, because heat takes the lighter humulene molecules first.
Who it suits
Blue Zushi 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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Blue Zushi 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.
Two backcross generations to the recurrent parent have welded Blue Zushi into a stable seed line. The cross-derived trichome production expresses uniformly — no surprise-pheno hunting once the pack pops.
Pin the trichome production that came out of the original Blue Zushi cross.
Chosen for hybrid frame, clean terpene expression and consistent yield across the population.
Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.