Sativa Dominant · Brothers Grimm
Cinderella 99
Cinderella 99, commonly shortened to C99, is the Brothers Grimm cross of Jack Herer and Shiva Skunk stabilized by Canadian breeder Mr. Soul in the late 1990s, one of the first true sativa hybrids selected for indoor commercial yields rather than landrace-purist preservation. The strain became a foundational input for dozens of later Pacific Northwest crosses including Cinex and is widely considered a reference standard for fast-flowering sativa hybrids that finish in nine weeks indoors. The flavor leans sweet citrus and floral on the inhale with a faint earthy exhale, and plants finish in eight to nine weeks indoors with medium-density buds, bright orange pistils, and a moderate trichome layer. The high is one of the sharpest cerebral lifts in commercial seed — fast onset, clear-headed, and energetic for the first two hours.
Reviewed 2026-05-23· Sources: seedfinder.eu, Brothers Grimm catalogue, Mr. Soul Breedbay archives
Potency
- THC range
- 16–22%
- Typical THC
- 20%
- CBD
- up to 0.1%
Flowering
- Indoor weeks
- 8–9 wk
- Difficulty
- Moderate
- Climate
- Mediterranean, warm temperate, indoor
Yield & size
- Indoor
- 425-525 g/m²
- Outdoor
- 450-650 g/plant
- Height
- 110-140 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Cinderella 99 smells, tastes, and ultimately feels in the body.
- dominant
Terpinolene
Piney and fruity — fresh, slightly floral, common in sativa-leaning cultivars.
- secondary
Limonene
Uplifting citrus — typically associated with mood elevation and stress relief.
- secondary
Ocimene
Sweet and herbal — light, tropical, with a decongestant character.
- minor
Pinene
Alert and pine-forward — associated with mental clarity and bronchodilation.
Reported side effects
Lineage
Cinderella 99 traces to Jack Herer × Shiva Skunk. The cross sits in the Jack Herer / Skunk family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents and grandparents for Cinderella 99 based on breeder catalogues. Library entries are clickable; ancestors not yet documented on this site appear in a lighter, non-linked box.
Strains crossed with Cinderella 99
Cinderella 99 is a parent of 4 strains in the broader catalogue. These are crosses that carry Cinderella 99 genetics on at least one side of the cross.
Grow profile
Grow profile
- Indica / sativa
- 15% / 85%
- Flowering days
- 56–63 days
- Stretch
- High
- Pest resistance
- High
- Mold resistance
- Moderate
- Training methods
- topping, scrog, supercropping
Feed schedule for Cinderella 99
These EC and NPK targets are starting points calibrated for the strain's Sativa lean and moderate difficulty rating — not gospel. Drop 15-20% off any EC ceiling on your first run and let the plant tell you where it actually wants to feed.
Suggested feed schedule
- Late veg
- 1.2-1.4 EC
- Early flower
- 1.3-1.5 EC, NPK 2-2-3
- Mid flower
- 1.6-1.8 EC, NPK 1-3-4
- Late flower
- 1.4-1.6 EC
- Final week
- Plain pH-balanced water for the last 7-10 days; light flush if you ran nutrients on the higher end.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
Cinderella 99 is documented with a 9-week flower and a longer stretch phase typical of sativa-leaning hybrids. The visual below maps a documented 13-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Cinderella 99 concentrate the most observational notes on the stretch window. This timeline is descriptive — it reflects what reports document, not a how-to. Actual week-to-week behaviour varies with phenotype, light intensity, pot size, and environment.
Phase details
- Veg (weeks 1-4)
- The documented vegetative period for Cinderella 99. Plants establish root structure, leaf canopy, and node count before flower triggering, with a moderate difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-7)
- Cinderella 99 is documented as having high stretch. Reports describe the plant roughly doubling in height during this phase as the sativa-leaning structure establishes its final flowering frame.
- Bud sites (weeks 8-9)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for Cinderella 99note this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 10-11)
- Flowers thicken and calyxes fatten through this phase. Documented Cinderella 99 runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 12)
- Trichomes transition from clear toward cloudy and amber. Reports for Cinderella 99 describe the Terpinolene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 13)
- Calyx swelling is documented as complete and the harvest window opens. Published Cinderella 99 runs end here, within the 8-9 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Common questions about Cinderella 99
Why is Cinderella 99 considered foundational?
It was one of the first true sativa hybrids stabilized for indoor commercial yields rather than landrace-purist preservation. Dozens of later Pacific Northwest crosses, including Cinex, use C99 as a parent or grandparent for its fast flowering and sativa expression.
Is Joey Weed's C99 the same as Brothers Grimm's?
Joey Weed's C99 is a preservation IBL of the original Brothers Grimm release, made during the years when Brothers Grimm was dormant. The two lines are closely related, with Brothers Grimm's modern relaunched catalogue being the canonical source.
Breeder of record
Brothers Grimm
View breeder profile and other strains →
Strains similar to Cinderella 99
These picks lean on the same terpene profile and parent genetics as Cinderella 99 — shared dominant terps, overlapping lineage, and matching indica/sativa lean. No star ratings or popularity contests, just overlap on the traits that actually drive a similar grow and smoke.
