Silver Haze cannabis seeds packaging — Royal King Seeds Ireland
Sativa
THC 22%
🎨 Creative
SativaFeminisedIn Stock

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.

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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 2026-09-23 on 100 seeds at 20-23°C.

Germination rate: 96.5% (n=100)
Last QC test date: 2026-09-23
Indoor yield: 392-544 g/m² (avg across 12 verified grower reports)
Outdoor yield, Ireland: 468-736 g/plant (avg across 7 verified grower reports)

About Silver Haze Feminised

Everything about Silver Haze at harvest follows from one decision, which is when you stop. The figures are Up to 400g/m² indoors and Up to 450 gr outdoors, with resin filling towards 22% THC. A 10/90 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 9-12 weeks of bloom account for most of the difference between a good result and an average one on a plant rated Up to 400g/m² indoors and Up to 450 gr 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: 9-12 weeks. Indoor yield: Up to 400g/m². Outdoor yield: Up to 450 gr. Plant height: Tall. Rated difficult difficulty.

What Silver Haze is like in practice

The catalogue lists energetic, relaxed, uplifted, and that matches what growers here report back. At 22% 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

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 9-12 weeks fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

Effects

🤑Energetic
71% of people reported feeling Energetic
😌Relaxed
65% of people reported feeling Relaxed
😎Uplifted
58% of people reported feeling Uplifted
😊Happy
51% of people reported feeling Happy
🤩Creative
50% of people reported feeling Creative
🤗Euphoric
40% of people reported feeling Euphoric
🧠Focused
35% of people reported feeling Focused
🗣️Talkative
23% of people reported feeling Talkative
💪Motivated
24% of people reported feeling Motivated

Best For

✦ Daytime
✦ Depression
✦ Pain
✦ Stress

Strain Type

Indica 10%Sativa 90%

Strain Data Sheet

🧬THC22% - 26% (High)
🌿LineageNorthern Lights × Haze
🔬TypeFeminised Sativa
🌡ClimateWarm / Mediterranean, long season
📅HarvestSept – Nov, S. hemisphere (typical)
📏HeightTall
⚖️YieldMedium – High
🏠Yield IndoorUp to 400g/m²
🌳Yield OutdoorUp to 450 gr
⏱Flowering Time9-12 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers are responsible for complying with the law where they live.
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Silver Haze Feminised
royalkingseeds.ie
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Silver Haze Feminised — Breeder Information

Royal King Genetics

Bred 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.

Stabilisation Level
F5 IBL
Generations
5+
Breeding Programme
Royal King Genetics IBL — heritage cultivar restabilisation
Stabilisation Notes — What This Means for Your Grow

A genuine F5 inbred line. Silver Haze has been progressed through five filial generations of phenotype selection at Royal King Genetics, working from the original 1990s landrace-derived reference stock. Population uniformity is the rule rather than the exception.

Breeding Goal

Bring the original Silver Haze reference profile back to true-to-type seed stock.

Selection Focus

Chosen for sativa vigour, bud-to-leaf ratio and the distinctive terpene character of the original cut.

Pollen / Mother Source

Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.

Last Batch QC Verified
22 September 2026· 99%+ germination