Haze #99
A rare Neville's Haze phenotype selection with sativa-heavy structure and a hazy backstory that varies by who's telling it.
Haze #99 is one of those names that shows up in old-school seed catalogs and forum threads with confident lineage claims that don't always agree. There's no lab-verified pedigree, no clinical data on its effects, and no meaningful modern chemotype survey. What we can say honestly: it's a Haze-family sativa, long-flowering, and prized by hobbyists who like cerebral, energetic highs. Everything past that — exact parents, THC ceilings, specific medical uses — is folklore, breeder marketing, or user reports, not science.
Overview
Haze #99 is a phenotype-selection name attached to plants descending from the broader Haze lineage that emerged from 1970s California and was later stabilized in the Netherlands. The number "#99" is a breeder/grower shorthand for a specific keeper plant — a common practice in cannabis breeding where numbered pheno hunts identify standout individuals [1]. Unlike widely distributed cultivars such as OG Kush or Blue Dream, Haze #99 has never been a mainstream commercial strain. It circulates mostly through small seedbanks, clone-sharing communities, and heirloom-focused growers Anecdote.
Be careful with the name: "Haze 99" is sometimes confused with Cinderella 99 (C99), which is a Jack Herer / Shiva Skunk descendant bred by Mr. Soul of Brothers Grimm — a genetically different plant [2].
Lineage (disputed)
The lineage of Haze #99 is not documented in any peer-reviewed or government source. Community claims include:
- A numbered phenotype from a Neville's Haze seed run (Neville's Haze itself being a Sensi Seeds cross of Original Haze x Northern Lights #5 / Skunk-influenced male) [3] Disputed.
- A selection from Original Haze seed stock preserved by private breeders Anecdote.
- Occasionally, an unrelated Haze-leaning cut renamed by dispensaries Anecdote.
There is no cannabis-genomics study (e.g., the kind of SNP work done by Sawler et al. or Phylos Bioscience) that has publicly fingerprinted a plant labeled "Haze #99" [4]. Treat any confident lineage chart you see online as folklore until someone posts genotype data.
Chemistry: cannabinoids and terpenes
No published lab dataset isolates Haze #99 as a distinct chemotype. What we know is general to the Haze family:
- Haze-family plants tested in cultivar surveys tend to sit in the THC-dominant chemotype (Type I), with CBD typically under 0.5% [5] Strong evidence.
- Terpene profiles in Haze descendants are variable. Reported dominants across Haze cultivars include terpinolene, myrcene, ocimene, and caryophyllene, with terpinolene being the marker most often associated with the "classic Haze" nose [6] Weak / limited.
Breeder-reported THC figures for Haze #99 (typically 18-22%) come from marketing copy, not third-party COAs. If you buy flower or seeds sold under this name, ask for a certificate of analysis from a licensed lab — that's the only number worth trusting.
Reported effects
There are no clinical trials on Haze #99 specifically. In fact, there are essentially no strain-specific randomized trials for any named cultivar — cannabis clinical research uses standardized extracts or whole-plant preparations, not brand-name flower [7] Strong evidence.
User reports on forums and seedbank pages consistently describe Haze #99 as:
- Cerebral, energetic, and long-lasting
- Prone to producing anxiety or racing thoughts at higher doses
- Poorly suited for sleep or heavy body relaxation Anecdote
These reports are consistent with what people usually say about Haze-family sativas, but they should be read as consumer impressions, not pharmacology. The "indica vs. sativa predicts effects" model is not supported by chemical data — chemotype and dose predict effects far better than the sativa/indica label [8] Strong evidence.
Cultivation basics
Haze #99, like most Haze-leaning plants, is not beginner-friendly:
- Flowering time: 10-13 weeks indoors. Some phenotypes push past 14 weeks — one reason Haze genetics fell out of commercial favor when 8-9 week hybrids took over [3].
- Structure: Tall, stretchy, with long internodes. Expect 2-3x stretch after flip. Training (topping, LST, SCROG) is essentially mandatory in a typical indoor tent.
- Yield: Moderate. Growers report ~400-450 g/m² indoors under good conditions, though this varies widely by phenotype and grower skill Anecdote.
- Climate: Outdoors, it wants a long, warm season — think Mediterranean or equatorial. In northern latitudes it often won't finish before frost.
- Sensitivity: Haze plants are generally sensitive to overfeeding, especially nitrogen in flower.
If you want the Haze experience with less headache, faster-flowering Haze hybrids like Amnesia Haze or Super Silver Haze exist.
Marketing vs. reality
Watch for these common claims around Haze #99 and Haze-family flower generally:
- "Pure sativa landrace." Almost no modern commercial Haze is pure anything. The original Haze was already a polyhybrid of Mexican, Colombian, Thai, and South Indian genetics [3] Weak / limited. Anything sold today has been hybridized further.
- "Won't cause anxiety because it's sativa." High-THC, low-CBD flower can trigger anxiety in susceptible users regardless of indica/sativa labeling [9] Strong evidence.
- "Terpinolene above X% guarantees an uplifting effect." There is no validated terpene threshold that predicts a specific subjective effect in humans. This is folklore that got repeated until it sounded like science No data.
- Named lineage with confident percentages (e.g., "75% Original Haze / 25% NL5"). Without genotype data, these are storytelling, not measurement.
Haze #99 is worth trying if you like long-flowering cerebral sativas and you trust your source. Just don't buy the pedigree story as fact.
Sources
- Book Clarke, R. C., & Merlin, M. D. (2013). Cannabis: Evolution and Ethnobotany. University of California Press.
- Reported Danko, D. (2015). Cannabis Now: 'The History of Cinderella 99' — coverage of Mr. Soul and Brothers Grimm Seeds.
- Book Rosenthal, E. (2010). Marijuana Grower's Handbook. Quick American Publishing. (Chapters on Haze lineage and Dutch seedbank history.)
- Peer-reviewed Sawler, J., Stout, J. M., Gardner, K. M., et al. (2015). The Genetic Structure of Marijuana and Hemp. PLoS ONE, 10(8), e0133292.
- Peer-reviewed Hazekamp, A., & Fischedick, J. T. (2012). Cannabis - from cultivar to chemovar. Drug Testing and Analysis, 4(7-8), 660-667.
- Peer-reviewed Smith, C. J., Vergara, D., Keegan, B., & Jikomes, N. (2022). The phytochemical diversity of commercial Cannabis in the United States. PLoS ONE, 17(5), e0267498.
- Government National Academies of Sciences, Engineering, and Medicine. (2017). The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research. Washington, DC: The National Academies Press.
- Peer-reviewed Piomelli, D., & Russo, E. B. (2016). The Cannabis sativa Versus Cannabis indica Debate: An Interview with Ethan Russo, MD. Cannabis and Cannabinoid Research, 1(1), 44-46.
- Peer-reviewed Sharpe, L., Sinclair, J., Kramer, A., de Manincor, M., & Sarris, J. (2020). Cannabis, a cause for anxiety? A critical appraisal of the anxiogenic and anxiolytic properties. Journal of Translational Medicine, 18, 374.
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