UW cannabis seeds packaging — Royal King Seeds UK
Indica
THC 22%
🌙 Sleep Aid
IndicaFeminisedIn Stock

UW Feminised

Feminised PhotoperiodSee Lab Report →

UW Feminised — indica cannabis seeds suited to UK growing conditions. 22% THC with happy, relaxed, sleepy effects. Fast, discreet UK delivery.

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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified UK grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-08 on 500 seeds.

Germination rate: 96.3% (n=500)
Last QC test date: 2026-09-08
Indoor yield: 491-610 g/m² (avg across 7 verified grower reports)
Outdoor yield: 451-758 g/plant (avg across 6 verified grower reports)

About UW Feminised

Read UW backwards from the harvest: up to 350 g/m2 under lights, up to 450 g/plant outdoors, with resin filling out towards 22% THC. Most of the final weight lands between weeks five and eight, when the 80/20 genetics stack calyxes quickly and the trichome cover goes from scattered to solid. Outdoors you want that stage falling in late August and early September while the light is still long, so count back to it from the first frost your own area usually sees rather than from a date on a packet.

Getting the weight out of this plant

Three stretches of the 55-65 days of bloom decide whether you reach the top of this strain's range (up to 350 g/m2 indoors, up to 450 g/plant outdoors). The rest is maintenance.

The first ten days of flower. What the plant does during the stretch sets canopy height, and canopy height sets how evenly the light lands. Expect 20-30%, which is manageable; stripping the lowest fans around day seven sends the energy up to the sites that will actually finish.

Weeks three to five. Myrcene production climbs through here, and it responds to a day-night temperature gap of 6-8°C. British autumn nights hand that to outdoor growers for free from September; indoors you have to build it, at roughly 25-26°C lights-on and 18-20°C lights-off. Bloom feed goes potassium-heavy around EC 1.6-1.8.

The last ten to fourteen days. Stop feeding and run pH-corrected water. Check trichomes daily under a 60x loupe — cut at 15-20% amber for the weight of effect this genetics is bought for. Outdoors that lands between late September and mid-October across most of Britain, and the weather forecast should get a vote.

Flowering: 55-65 days. Indoor yield: up to 350 g/m2. Outdoor yield: up to 450 g/plant. Rated intermediate difficulty.

What UW is actually like

Growers report happy, relaxed, sleepy as the defining characteristics and our own notes agree. At 22% THC this indica sits where dose control starts to matter. A single bowl through a vaporiser at 185°C gives a manageable physical ease with the head still working, which is what most people want at the end of a day. Push the dose and it moves firmly towards sedation — the reason it tends to become a winter evening cultivar rather than an all-year one. The Myrcene/Humulene pairing leaves earth and faint sweetness on the palate, with fruit at the end.

Best suited to quiet evenings, a film, recovery after exercise, and the hour before sleep.

Terpene breakdown

Primary: Myrcene · Secondary: Humulene · Tertiary: Linalool. These three build an aroma that keeps moving through the cure. Fresh off the dry it leads with myrcene; after three or four weeks sealed in glass at 16-18°C the linalool underneath comes up and the whole thing gains a layer. Vaporising between 180°C and 195°C catches the widest span of them, since the lighter linalool molecules are the first thing heat destroys.

Who it suits

UW suits growers with the basics in place. Understand pH, rough nutrient ratios and light cycles before you commit to it; it asks for competence rather than expertise. Photoperiod genetics leave plant size and harvest date under your control — veg longer for bigger plants, or flip early when space is short. The April to October season accommodates a bloom of 55-65 days comfortably for outdoor growers across the country.

Effects

😊Happy
72% of people reported feeling Happy
😌Relaxed
65% of people reported feeling Relaxed
😴Sleepy
65% of people reported feeling Sleepy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿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

Strain Type

Indica 80%Sativa 20%

Strain Data Sheet

🧬THC22% - 25% (High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Indica
🌡ClimateCool–temperate / continental
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height90 – 120 cm (typical)
⚖️YieldMedium
🏠Yield Indoorup to 350 g/m2
🌳Yield Outdoorup to 450 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 must comply with all applicable United Kingdom legislation.
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UW Feminised
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🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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UW 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
F4
Generations
4+
Breeding Programme
F4 Production Line — modern cross stabilisation
Stabilisation Notes — What This Means for Your Grow

UW runs through our F4 programme. Four cycles of phenotype selection have removed the worst of the trait variation; what is left is a tight, predictable population for production.

Breeding Goal

Pin compact internode spacing consistency across the UW population.

Selection Focus

Chosen for trichome coverage, stout structure and consistent flowering time across the pack.

Pollen / Mother Source

Royal King Genetics elite-cut archive — pollen from a maintained S1 line of the original elite mother.

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