The Sister cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 23%
📈 High Yield
IndicaFeminisedIn Stock

The Sister Feminised

Order The Sister Feminised seeds online in Ireland. A quality indica cultivar at 23% THC delivering euphoric, calm. Chosen for a short season and a damp finish. Fast shipping and a germination guarantee.

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€10.49EUR
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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 2026-09-07 on 475 seeds at 20-23°C.

Germination rate: 97.9% (n=475)
Last QC test date: 2026-09-07
Indoor yield: 440-608 g/m² (avg across 16 verified grower reports)
Outdoor yield, Ireland: 396-556 g/plant (avg across 3 verified grower reports)

About The Sister Feminised

Everything about The Sister at harvest follows from one decision, which is when you stop. The figures are 150–250 g/m² indoors and 350–650 g/plant outdoors, with resin filling towards 23% THC. Weight arrives late on a plant this indica-leaning — the 77/23 split stacks calyxes hard through the middle weeks and then thickens them. Growers who cut on the calendar rather than the glass lose that last stage, and it is the most valuable one.

Where the weight is won

Three parts of the 7–9 weeks of bloom account for most of the difference between a good result and an average one on a plant rated 150–250 g/m² indoors and 350–650 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. Twenty to thirty per cent is typical; taking the lowest fans around day seven pushes energy up to the sites that will finish.

Weeks three to five. Linalool 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. Fifteen to twenty per cent amber suits the weight of effect this one is grown for. Outdoors, that falls between late September and mid-October, and the forecast gets a say.

Flowering: 7–9 weeks. Indoor yield: 150–250 g/m². Outdoor yield: 350–650 g/plant. Plant height: 160–200 cm. Rated intermediate difficulty.

What The Sister is like in practice

The catalogue lists euphoric, calm, and that matches what growers here report back. At 23% THC this indica sits where the dose is the whole question. One bowl through a vaporiser at 185°C leaves the head working and the body easy, which is what most people are after on a weeknight. More than that moves it firmly towards sedation. The Linalool and Myrcene together leave a finish that keeps shifting across a session.

Suited to evenings in, recovery after work, and the hour before sleep.

Terpene breakdown

Primary: Linalool · Secondary: Myrcene · Tertiary: Caryophyllene. The three shift relative to each other across the cure. Straight off the dry the linalool dominates; three or four weeks sealed in glass at 16-18°C and the caryophyllene underneath comes up to meet it. Vaporising between 180°C and 195°C catches the widest span, because heat takes the lighter caryophyllene molecules first.

Who it suits

The Sister 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 7–9 weeks 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
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
😴Sleepy
58% of people reported feeling Sleepy
😊Happy
45% of people reported feeling Happy
🤤Hungry
41% of people reported feeling Hungry
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Best For

✦ Evening
✦ Relaxation
✦ Sleep Support

Strain Type

Indica 77%Sativa 23%

Strain Data Sheet

🧬THC23% - 26% (High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Indica
🌡ClimateCool–temperate / continental
📅HarvestSept – Nov, S. hemisphere (typical)
📏Height160–200 cm
⚖️YieldMedium
🏠Yield Indoor150–250 g/m²
🌳Yield Outdoor350–650 g/plant
⏱Flowering Time7–9 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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The Sister Feminised
royalkingseeds.ie
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FB
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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The Sister 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
BX2
Generations
3+
Breeding Programme
Two-Generation Backcross Programme — recurrent-parent fixing
Stabilisation Notes — What This Means for Your Grow

Two backcross generations to the recurrent parent have welded The Sister into a stable seed line. The cross-derived purple expression expresses uniformly — no surprise-pheno hunting once the pack pops.

Breeding Goal

Fix parent-cut traits in The Sister without narrowing the population too far.

Selection Focus

Chosen for purple/dark expression where it shows, dense bud structure and a true indica relaxation profile.

Pollen / Mother Source

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

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