
Super Silver Haze Feminised
Super Silver Haze Feminised — premium sativa cannabis seeds suited to Irish growing conditions. 25% THC with focused, energetic, 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 2026-09-09 on 450 seeds at 20-23°C.
About Super Silver Haze Feminised
Days 1-14, germination and early veg. Super Silver Haze generally cracks within about two days on damp kitchen paper and is above the medium by day three. The first fortnight came in quick and reaching, narrow leaves angled up from the start. Five nodes by day 14 with real space between them, which tells you what is coming after the flip. Keep the humidity near 70% and damping off stops being a concern.
Weeks 3-6, veg. It wanted to climb. Low-stress training from week three was not enough on its own, so the main stem went over at a right angle in week four and the secondaries levelled up behind it.
Bloom, weeks 1-11. The 6/94 character came through clearly. Terpinolene was noticeable by week three and kept building; resin was obvious without a loupe from about week five. Indoor yield: up to 800 g/m2. Height: Tall. Tested at 25%. Rated medium.
The rest of the run
Weeks 4-6, mid-bloom. Loose clusters from week three closed up into defined colas. Buds kept extending rather than thickening, stacking calyxes along the stems. The lower sites did better than expected, because an open plant lets light reach places a bushy one shades out.
Ripening, weeks 9-11. Plain water for the last ten days. Terpinolene 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 up to 800 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: 10-11 weeks. Indoor yield: up to 800 g/m2. Outdoor yield: 1500 g/plant. Plant height: Tall. Rated medium difficulty. Feminised seeds.
What Super Silver Haze is like in practice
The catalogue lists focused, energetic, calm, and that matches what growers here report back. At 25% 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. Temperature decides how much of this profile survives. Low vaporisation at 180-188°C keeps limonene and ocimene audible over the terpinolene; run it hotter, or burn it, and all three collapse into one note that is pleasant enough and tells you nothing.
Who it suits
Super Silver Haze 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 10-11 weeks fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.
Effects
Best For
Strain Type
Strain Data Sheet
Packaging
Feminised Premium
Seeds
authenticity
lining
number
Related Strains

Silver Haze Feminised
Order Silver Haze Feminised seeds online in Ireland. A quality sativa cultivar at 22% THC delivering energetic, relaxed, uplifted. Chosen for a short season and a damp finish. Fast shipping and a germination guarantee.

Arctic Sun Feminised
Arctic Sun Feminised cannabis seeds for Irish growers. Sativa strain · 22% THC · energetic, calm. Discreet packaging, nationwide delivery, sourced grow figures.

Americano Feminised
Grow Americano Feminised in Ireland. Indica genetics testing at 20% THC. Known for relaxed, sleepy, happy effects. Ships discreetly nationwide with sourced grow figures.

California Grapefruit Feminised
California Grapefruit Feminised — premium hybrid cannabis seeds suited to Irish growing conditions. 12% THC with euphoric, creative, calm effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.
Super Silver Haze 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 heritage cultivar that we have taken through five rounds of inbred selection. The 1990s landrace-derived reference profile — terpene fingerprint, finishing window, plant frame — has been welded into the population. Every seed in the pack carries the trait set that put Super Silver Haze on the map.
Pin down the original 1990s landrace-derived terpene profile in modern seed form.
Chosen for vigour, manageable stretch and the cerebral terpene profile sativa growers buy this strain for.
Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.