White Widow cannabis seeds packaging — Royal King Seeds Ireland
Hybrid
THC 26%
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White Widow Feminised

White Widow Feminised — premium hybrid cannabis seeds suited to Irish growing conditions. 26% THC with euphoric, relaxed, uplifted effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.

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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 425 seeds at 20-23°C.

Germination rate: 98.2% (n=425)
Last QC test date: 2026-09-23
Indoor yield: 424-540 g/m² (avg across 12 verified grower reports)
Outdoor yield, Ireland: 496-672 g/plant (avg across 7 verified grower reports)

About White Widow Feminised

Everything about White Widow at harvest follows from one decision, which is when you stop. The figures are 450-500 g/m2 indoors and 550-600 g/plant outdoors, with resin filling towards 26% THC. The 50/40 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 55-65 days of bloom account for most of the difference between a good result and an average one on a plant rated 450-500 g/m2 indoors and 550-600 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. Around a third is usual. A single pass of training across the tallest shoots keeps the top flat.

Weeks three to five. Myrcene 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: 55-65 days. Indoor yield: 450-500 g/m2. Outdoor yield: 550-600 g/plant. Plant height: 60 - 90 cm. Rated easy difficulty.

What White Widow is like in practice

The catalogue lists euphoric, relaxed, uplifted, and that matches what growers here report back. At 26% THC this hybrid sits where the balance is the argument for it. Small doses stay functional, larger ones relax properly, and the 50/40 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

White Widow 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 55-65 days fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

Effects

🤗Euphoric
74% of people reported feeling Euphoric
😌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
🤤Hungry
41% of people reported feeling Hungry
😴Sleepy
38% of people reported feeling Sleepy
😆Giggly
31% of people reported feeling Giggly
🧠Focused
21% of people reported feeling Focused

Best For

✦ Anytime
✦ Depression
✦ Pain
✦ Stress

Strain Type

Indica 50%Sativa 40%

Strain Data Sheet

🧬THC26% - 31% (Very High)
🌿LineageBrazilian Sativa (Landrace) × South Indian Indica (Landrace)
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestSept – Nov, S. hemisphere (typical)
📏Height60 - 90 cm
⚖️YieldMedium – High
🏠Yield Indoor450-500 g/m2
🌳Yield Outdoor550-600 g/plant
⏱Flowering Time55-65 days

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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White Widow Feminised
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🛡️Aluminium interior lining
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White Widow 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
IBL Heritage Programme — five-generation inbred fixing
Stabilisation Notes — What This Means for Your Grow

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

Breeding Goal

Bring the original White Widow reference profile back to true-to-type seed stock.

Selection Focus

Chosen for trichome density, bud structure and the hybrid trait balance the cross was engineered for.

Pollen / Mother Source

Royal King Genetics in-house mother stock — pollen taken from a sibling male drawn from the same selected pheno population.

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