
Supergirl Feminised
Grow Supergirl Feminised in the UK. Indica genetics at 26% THC, known for relaxed, sleepy, happy effects.
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.
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
Strain Type
Strain Data Sheet
Packaging
Feminised Premium
Seeds
authenticity
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Supergirl Feminised β Breeder Information
Royal King GeneticsBred 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.
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.
Pin dense flower architecture consistency across the Supergirl population.
Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.
Royal King Genetics in-house breeder room β pollen taken from a generation-tracked sibling-male line.