RK
Supergirl cannabis seeds packaging β€” Royal King Seeds UK
Indica
THC 26%
⚑ High Potency
IndicaFeminisedIn Stock

Supergirl Feminised

Feminised PhotoperiodSee Lab Report β†’

Grow Supergirl Feminised in the UK. Indica genetics at 26% THC, known for relaxed, sleepy, happy effects.

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Β£11.35
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Royal King Genetics β€” 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 2026-09-18 on 150 seeds.

Germination rate: 99.2% (n=150)
Last QC test date: 2026-09-18
Indoor yield: 434-568 g/mΒ² (avg across 10 verified grower reports)
Outdoor yield: 630-860 g/plant (avg across 5 verified grower reports)

About Supergirl Feminised

Read Supergirl backwards from the harvest: 450-550 g/m2 (SOG) under lights, Moderate to High outdoors, with resin filling out towards 26% THC. Most of the final weight lands between weeks five and eight, when the 88/12 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 7-9 weeks of bloom decide whether you reach the top of this strain's range (450-550 g/m2 (SOG) indoors, Moderate to High 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 6-8Β°C. British autumn nights hand that to outdoor growers for free from September; indoors you have to build it, at roughly 25-26Β°C lights-on and 18-20Β°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 β€” 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: 7-9 weeks. Indoor yield: 450-550 g/m2 (SOG). Outdoor yield: Moderate to High. Rated intermediate difficulty.

Flavour, aroma and effect

Supergirl arrives in stages. The first draw at 26% THC brings a musky earthiness that coats rather than cuts. The relaxed, sleepy, happy character follows within minutes, starting as weight behind the eyes and working down through the shoulders and chest. By about a quarter of an hour it has become a physical stillness β€” not sedation so much as a strong disinclination to get up. Two to three hours at a moderate dose. The caryophyllene underneath adds a warmth that keeps the whole thing anchored.

Terpene breakdown

Primary: Myrcene Β· Secondary: Caryophyllene Β· Tertiary: Linalool. This combination turns up often in cultivars that win things, and it is usually the one growers comment on when a jar is opened for the first time after curing. Myrcene anchors the aroma, caryophyllene occupies the middle, and linalool sits behind both β€” which is the part that separates this strain from others sharing its primary terpene.

Who it suits

Who does well with Supergirl? Indoor growers who want the timeline under their own control. Outdoor growers who want to choose when flowering starts. Anyone with the room and the patience to veg it properly before flipping. Difficulty is rated intermediate, which means a moderate learning curve that rewards attention without demanding a laboratory.

Effects

😌Relaxed
72% of people reported feeling Relaxed
😴Sleepy
72% of people reported feeling Sleepy
😊Happy
58% of people reported feeling Happy
🀀Hungry
54% of people reported feeling Hungry
πŸ€—Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿Stress Relief
27% of people reported feeling Stress Relief
πŸ’†Body High
24% of people reported feeling Body High
πŸ˜Άβ€πŸŒ«οΈSedated
21% of people reported feeling Sedated

Strain Type

Indica 88%Sativa 12%

Strain Data Sheet

🧬THC26% - 29% (Very High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
πŸ”¬TypeFeminised Indica
🌑ClimateCool–temperate / continental
πŸ“…HarvestLate Sept – Oct, UK outdoor (typical)
πŸ“Height90 – 120 cm (typical)
βš–οΈYieldHigh
🏠Yield Indoor450-550 g/m2 (SOG)
🌳Yield OutdoorModerate to High
⏱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 must comply with all applicable United Kingdom legislation.
1
Supergirl Feminised
royalkingseeds.co.uk
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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Supergirl Feminised β€” Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics β€” 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
Filial Stabilisation (F4) β€” four-generation selection
Stabilisation Notes β€” What This Means for Your Grow

Supergirl has been progressed through four generations of phenotype hunting and selection. Vigour, dense flower architecture and finishing time are all locked across the pack β€” every plant performs to the spec sheet.

Breeding Goal

Pin dense flower architecture consistency across the Supergirl population.

Selection Focus

Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.

Pollen / Mother Source

Royal King Genetics in-house breeder room β€” pollen taken from a generation-tracked sibling-male line.

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