
Cinderella 99 Feminised
Cinderella 99 Feminised seeds. A sativa cultivar at 22% THC delivering euphoric, sleepy, energetic. Grow figures from named sources.
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 2026-09-06 on 275 seeds.
About Cinderella 99 Feminised
Germination and early veg, days 1-14. Cinderella 99 seeds generally crack inside 48 hours on damp kitchen roll and break the surface around day three. Early growth came in fast and upright, the first narrow leaves reaching for the light from the start. Five nodes by the end of week two with obvious space between them, which tells you what the stretch is going to do later. Damping off is rare around 70% relative humidity, which is also roughly what an unheated British room sits at in spring.
Veg, weeks 3-6. Vertical growth needed managing. Even with low-stress training from week three it wanted to climb, so the main stem went over at a right angle in week four; the secondaries caught up and the canopy was flat by week six.
Bloom, weeks 1-9. This is where the 5/95 balance in Cinderella 99 showed itself. The limonene came up in week three and kept building; trichome cover was obvious to the naked eye from week five. Indoor yield: 500 g/m². Height: ~120 cm (122 cm) finished when flipped at 45 cm. THC testing at 22%. Rated intermediate.
The rest of the diary
Mid-bloom, weeks 4-6. The change came quickly. Sites that were loose and wispy at week three closed into defined colas. The buds kept extending lengthwise, stacking fresh calyxes along the stems. The secondaries outperformed expectations: the open structure let light reach sites that a bushier plant would have shaded out completely.
Ripening, weeks 7-9. Feeding dropped to plain water for the last ten days. The limonene got strong enough that carbon filtration stopped being optional in a terraced house. Trichomes ran clear to milky across the final fortnight, amber showing on sugar leaves first. Around 15% amber on the calyxes is a common place to stop.
Drying and curing. Whole plant hung in the dark at 17°C and 58% humidity for twelve days — both numbers held by a dehumidifier, because an October room in this country will not hold either on its own. Stems snapped rather than bent, which is the test worth trusting. Four weeks in glass followed, burped twice daily for the first fortnight and once daily after. Final weight matched the 500 g/m² figure. The terpinolene was far more present after the cure than at harvest, which is the argument for curing properly: the process makes flavour rather than merely keeping it.
Flowering: 56-63 days. Indoor yield: 500 g/m². Outdoor yield: 400 g/plant. Plant height: ~120 cm (122 cm) finished when flipped at 45 cm. Rated intermediate difficulty. Feminised seeds.
What Cinderella 99 is actually like
Growers report euphoric, sleepy, energetic as the defining characteristics and our own notes agree. At 22% THC this sativa sits where most people find a workable window. Vaporised at 175-185°C the first effect is lift and mental energy, suited to work that benefits from it, a long walk, or an afternoon with company. The body stays light throughout, which makes it a genuine daytime option for anyone with a tolerance. The Limonene/Terpinolene pairing leaves a clean citrus finish that clears quickly.
Best suited to creative work, company, getting outdoors, and daytime use generally.
Terpene breakdown
Primary: Limonene · Secondary: Terpinolene · Tertiary: Pinene. How this profile survives the journey from flower to vapour depends on temperature. Low vaporisation, 180-188°C, keeps the terpinolene and pinene audible over the limonene base. Run it hotter, or burn it, and the three collapse into one note — pleasant enough, but none of the complexity that made it worth choosing.
Who it suits
Cinderella 99 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 56-63 days comfortably for outdoor growers across the country.
Effects
Strain Type
Strain Data Sheet
Packaging
Feminised Premium
Seeds
authenticity
lining
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Cinderella 99 Feminised — Breeder Information
Royal King GeneticsBred 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.
A recent-era cross stabilised over four generations of selection. Cinderella 99 grows true-to-type with the finished-flower potency that defines the cultivar.
Carry Cinderella 99 from F1 cross to F4 production-ready seed stock.
Chosen for trichome density, sativa branching architecture and an energising terpene expression.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.