818 Pure SFV OG by Relentless Genetics: A Comprehensive Strain Guide

History and Breeding Background

818 Pure SFV OG is a purpose-built preservation of the San Fernando Valley OG profile, developed by Relentless Genetics to retain the unmistakable valley-forward brightness and fuel that made SFV OG a modern classic. The name 818 nods to the San Fernando Valley area code, a subtle signal that this selection prioritizes fidelity to the original region-specific expression. Where many OG lines were crossed and re-crossed during the 2010s hype cycle, 818 Pure SFV OG was curated to keep the core chemotype intact for both connoisseurs and breeders.

SFV OG’s broader story stretches back to the mid-2000s, when OG Kush-derived phenotypes with sharper lemon-pine volatility and a drier, gassier nose began circulating in Southern California. These SFV-forward cuts were prized for a high-THC chemotype and a racy, chest-expanding inhale that still delivered classic OG body weight. Relentless Genetics channeled that demand into a stabilized line that growers could trust to deliver the Valley’s signature bite and diesel backbone without diluting the profile.

Relentless Genetics is widely respected for selection discipline, and 818 Pure SFV OG reflects that ethos. Rather than chasing novelty through multilayered crosses, this release emphasizes the pure, unstacked essence of SFV OG. The result is a cultivar that reliably expresses the archetypal lemon-fuel OG experience while minimizing phenotype drift.

The line’s reliability shows up not only in consumer jars but also in breeding rooms. A notable example captured by SeedFinder is Tenzing from Trichome Bros, which used a reversed 818 Pure SFV OG S1 as a pollen donor alongside Agent Orange. That documented use case underscores 818 Pure SFV OG’s utility as a parent when a breeder wants to inject real-deal valley gas, lemon zest, and OG backbone into a hybrid (Source: Tenzing by Trichome Bros, SeedFinder: https://seedfinder.eu/en/strain-info/tenzing/trichome-bros).

As the legal market matured and third-party labs standardized potency and terpene analytics, SFV OG-type cuts continued to chart high THC values with sharp limonene and caryophyllene signatures. 818 Pure SFV OG fit squarely into that trend, offering cultivators a cultivar that consistently tested in the THC-dominant Category I range while maintaining the classic OG aromatic profile. This was particularly valued by legacy growers transitioning into regulated rooms who needed predictability without losing authenticity.

By curating a pure expression, Relentless Genetics supported both nostalgia and performance. Veteran consumers recognized the inhale and body feel immediately, while new consumers found a benchmark for what OG is supposed to taste and feel like. The cultivar has since become a reference point in modern selection work whenever breeders seek to rebuild or reinforce the OG spine in contemporary hybrids.

Today, 818 Pure SFV OG is regarded as a dependable, high-octane anchor in a sea of dessert-forward crosses. Its history is less about headline-grabbing novelty and more about fidelity to a regional profile that helped define West Coast cannabis. In a market that often drifts toward sweetness, this cultivar keeps the lemon, pine, and gas alive and loud.

Genetic Lineage and Taxonomy

818 Pure SFV OG traces its lineage to the San Fernando Valley OG family, itself a branch of the broader OG Kush tree that reshaped modern cannabis breeding. While OG naming conventions can be murky, SFV OG is widely recognized as an OG Kush-derived phenotype noted for sharper citrus, pine resin, and penetrating fuel. The 818 Pure SFV OG designation signals a selection focused on that SFV archetype rather than a multi-parent cross.

In taxonomic terms, 818 Pure SFV OG presents as an indica/sativa hybrid, with most growers describing it as indica-leaning in structure and body effect. Phenotypically, it tends to show the lankier, vine-like branching typical of OGs coupled with narrow leaflets and significant internodal spacing. Chemotypically, it expresses as a THC-dominant Type I cultivar with trace minors like CBG and CBC.

Relentless Genetics’ approach emphasizes preserving the maternal SFV OG expression, and the line is frequently referenced in S1 and reversal work by other breeders. The SeedFinder-documented Tenzing project by Trichome Bros lists 818 Pure SFV OG S1 as a reversed parent alongside Agent Orange, a pairing that leverages 818’s stable lemon-gas OG chassis. That kind of utilization suggests the genotype maintains a consistent terpene and potency envelope attractive for downstream crossing.

Given the OG family’s propensity for phenotypic variability, selections like 818 Pure SFV OG are practical tools for growers who need tighter trait windows. Reports from cultivators consistently describe a 1.6x to 2.0x stretch at flip, with a bloom time around 63 to 70 days depending on environment and desired trichome ripeness. These metrics align closely with other SFV OG and OG Kush lines, reinforcing that 818 Pure SFV OG sits firmly within the classic OG taxonomy.

The cultivar’s expected cannabinoid profile, dominated by delta-9 THC with minimal CBD, mirrors most legacy OGs. Minor cannabinoids such as CBG typically register between 0.3% and 1.0% by dry weight in well-grown flowers, with THCV present in trace amounts. This composition supports the rapid-onset, chest-expanding effect profile that many associate with Valley-forward OGs.

Because OG naming can be heterogeneous across regions, growers value 818 Pure SFV OG for acting as a reference-standard SFV expression. That clarity is useful in both consumer education and breeding design, particularly when differentiating sharper, citrus-fuel OGs from earthier, kushier expressions. In short, it is a lineage-true SFV OG selection stabilized for modern rooms.

Appearance and Morphology

Visually, 818 Pure SFV OG produces medium-density, golf-ball to conical flowers with a high calyx-to-leaf ratio. Bracts stack in tight clusters, and when dialed, the buds glisten with a sandy, uniform trichome blanket that often extends to sugar leaves. Mature pistils trend deep tangerine to rust, offering strong contrast against lime-to-forest green bracts.

The plant architecture exhibits classic OG traits: lanky frame, pliable stems, and notable internodal spacing that rewards trellising or a methodical SCROG. Indoors, untrained plants commonly finish between 90 and 140 cm, with a 1.6x to 2.0x stretch during the first 14 to 21 days of flower. Stacking improves markedly under even canopy management, high PPFD, and low-to-moderate nitrogen during late stretch.

Leaf morphology leans toward narrower leaflets with serrated edges, reflecting its hybrid-leaning-indica profile. Under intense light, some phenotypes will foxtail slightly late in bloom, which is typical of OGs and can be mitigated by keeping canopy PPFD under roughly 1,050 µmol·m⁻²·s⁻¹ and canopy temps below 80 to 82°F. When environmental parameters are on point, colas stack into dense, resin-heavy towers with minimal larf.

Trichome density is a highlight. Growers often report a gritty, greasy resin that is excellent for hydrocarbon extraction, with sugar leaves coated heavily enough to make trim work sticky. The glandular heads appear mostly cloudy by day 60 to 65, with ample scope for amber development if you prefer a heavier finish.

Color expression can include subtle lime hues early, deepening into richer greens as nutrients decline during ripening. Some phenotypes will flash faint purples or anthocyanin streaking in cooler night temperatures, but this is not the dominant look. The visual signature remains OG through and through: bright green, orange pistils, and frost.

Bud density is medium to medium-high, avoiding the rock-hard structure of some dessert cultivars while remaining satisfyingly weighty. A well-managed canopy produces a high proportion of A-grade tops, with minimal popcorn if defoliation and lower-branch lollipopping are handled correctly. Expect an attractive bag appeal anchored by resin coverage and classic OG structure.

Aroma and Bouquet

Open a cured jar of 818 Pure SFV OG and the first waves are lemon-peel brightness and pine resin, followed quickly by diesel, white pepper, and a grounding earthiness. The nose reads clean and assertive rather than candy-sweet, a hallmark of SFV OG that separates it from sugary contemporary crosses. Many noses also pick up hints of cedar, scorched rubber, and a faint herbal sweetness as the jar breathes.

On grind, the bouquet expands substantially. Volatile terpenes come forward in layers, with limonene-driven citrus leading, caryophyllene adding spice and bite, and pinene sharpening the pine-sol note. A light, savory funk reminiscent of fuel-soaked soil often lingers as the secondary layer.

The aroma intensity is high for a classic OG, and cured flowers can easily perfume a room within seconds of opening. OG-forward cultivars like 818 Pure SFV OG often test in the 1.5% to 3.0% total terpene range by weight when optimally grown and cured, and this cultivar slots comfortably into that band. Terpene expression is sensitive to drying and curing parameters, which is why slow 60/60 (60°F, 60% RH) programs are recommended to retain top notes.

As the flower warms in hand, an additional lemon-oil sheen and faint floral nuance may appear. This warmth-driven release often reveals subtle linalool and ocimene contributions that were hidden under the primary gas and pine. Taken together, the bouquet is layered yet focused, with no single note overpowering the others when curing is well executed.

Compared to other OG expressions, 818 Pure SFV OG is more lemon-forward than, say, Tahoe OG, and slightly less earthy than Ghost OG. The diesel-fuel edge is pronounced but clean, reminiscent of fresh fuel rather than skunk-forward funk. These distinctions make it a favorite for purists who want a crisp, modern OG nose without heavy sweetness.

For storage, terpene preservation is excellent in airtight glass at 58% to 62% RH and sub-65°F conditions. Under those conditions, the bouquet holds strong for months, with only gradual softening of the higher-volatility citrus terpenes. Proper storage is key to experiencing the cultivar as it was intended.

Flavor and Palate

The flavor follows the nose with striking fidelity. On the first inhale, lemon zest and pine sap dominate the palate, accompanied by a peppery bite that tingles the tongue. The exhale leans fuel and earthy, leaving a lingering citrus-oil finish that keeps the mouth watering.

As the session progresses, the profile rounds out into lemon-pine cleaner with a subtle savory depth, a balance that rewards slow sipping or low-temp vaping. Back-palate impressions include cedar shavings and a hint of bitter grapefruit pith, likely driven by the interplay of limonene, alpha-pinene, and beta-caryophyllene. The overall impression is clean, resinous, and unmistakably OG.

Vaporizer users can target 180 to 205°C to sample the full terpene ladder without scorching volatile top notes. Around 180 to 190°C, expect brighter lemon and pine with less fuel; at 195 to 205°C, the diesel, pepper, and earthy tones deepen. Combustion preserves the fuel and pepper while slightly muting the floral-herbal nuances.

A well-flushed and properly cured batch presents no harshness beyond the assertive OG spice. Any excessive bitterness or chlorophyll bite usually indicates insufficient drying or a rush to jar. When dialed, the draw is smooth with a satisfying throat hit that expands the chest without scratch.

Compared to sweeter, dessert-leaning modern cultivars, 818 Pure SFV OG is refreshing for its dryness and clarity. The lemon-fuel axis stays front and center, never descending into candy or pastry territory. For many, this is the archetype of what OG should taste like.

The persistent aftertaste makes it a favorite pairing with citrus seltzers, unsweetened iced tea, or light-roast coffee, all of which echo the bright top notes. Savory food pairings like grilled lemon chicken or rosemary potatoes also complement the piney, peppery finish. The flavor coherence across inhalation methods helps explain its staying power among purists.

Cannabinoid Profile and Potency

818 Pure SFV OG is a THC-dominant cultivar that typically falls into Chemotype I, with total THC commonly reported in the low-to-mid 20s by weight in mature, well-grown flowers. In regulated markets where OG cultivars are frequently tested, SFV-type cuts often chart between 20% and 26% THC, with standout batches occasionally pushing higher under optimized conditions. CBD is usually negligible, often below 0.5%, and frequently below analytical detection thresholds.

Minor cannabinoids round out the profile in trace-to-low amounts. CBG is the most commonly observed minor in OG lines, with values in the 0.3% to 1.0% range; CBC may present around 0.1% to 0.4%. THCV, if present, is typically trace at 0.1% to 0.4%, contributing little to the primary psychotropic effect at these levels.

From a user-experience perspective, potency feels immediate. Inhalation onset usually occurs within 2 to 5 minutes, peaks around 30 to 60 minutes, and tapers over 2 to 3 hours depending on dose and tolerance. The high THC combined with spicy, limonene-forward terpenes gives the cultivar its signature chest-expanding punch.

Dosing estimates help contextualize the numbers. A 0.5 g joint of 20% THC flower contains roughly 100 mg of THC; with typical delivery efficiencies between 10% and 25% for combustion, an individual may absorb about 10 to 25 mg across the session. Single, short puffs often deliver 2 to 4 mg of THC, a useful range for newcomers titrating carefully.

Concentrates derived from 818 Pure SFV OG can chart dramatically higher cannabinoid density, often exceeding 65% to 80% total cannabinoids in hydrocarbon extracts while retaining a robust terpene fraction. The cultivar’s resin quality makes it a strong candidate for live resin and sauce, with many extractors noting excellent separation and clarity. Such products should be approached with care due to the amplified potency.

Batch-to-batch variability exists, as with all cannabis, and cultivation parameters strongly influence outcome. High-light environments with adequate CO2 supplementation (1,000 to 1,200 ppm), tight VPD control, and disciplined nutrient management routinely push the upper end of the THC range. Conversely, excessive heat, overfeeding nitrogen late, or rushed dry/cure will depress both potency and terpene scores.

Terpene Profile and Minor Aromatics

The dominant terpene triad in 818 Pure SFV OG is typically beta-caryophyllene, limonene, and myrcene, a classic OG alignment that explains the peppered lemon-pine profile. In terpene assays from OG-family cultivars, caryophyllene commonly lands between 0.4% and 0.8% by weight, limonene around 0.3% to 0.7%, and myrcene between 0.2% and 0.6%. Total terpene content for well-grown batches often spans 1.5% to 3.0%.

Secondary contributors include alpha-pinene and beta-pinene, frequently totaling 0.1% to 0.3%, which sharpen the resinous pine quality. Humulene shows up regularly in the 0.1% to 0.3% band, adding a dry, woody undertone that complements caryophyllene’s spice. Linalool and ocimene may appear in trace-to-low amounts that contribute subtle floral and sweet-herbal lift.

Beta-caryophyllene is unique as a dietary cannabinoid that directly agonizes CB2 receptors, and while cannabis terpenes are not used as drugs, this interaction is often cited to explain perceived anti-inflammatory body sensations. Limonene is associated with bright, mood-lifting qualities and is a major driver of the citrus top note. Myrcene, classically linked with sedation in some chemovars, likely contributes to the body-heavy aspect of the experience when doses increase.

The fuel component often attributed to OGs is not a single terpene but a synergy of terpenes and sulfurous volatiles present in minute quantities. While sulfur compounds are usually measure