Super Lemon Haze Strain Review: Citrus Sativa Favorite (2026)
The double Cannabis Cup champion with a limonene-forward terpene profile that SC Labs consistently places among the top 5% of tested sativas. Full lineage breakdown, effects, and grow protocol inside.
The dominant assumption about Super Lemon Haze is that it's just a novelty flavour strain β fruity packaging over an average sativa. That is exactly backwards. Public SC Labs COA panels from 2023β2025 place SLH's limonene concentration in the top 5% of all submitted sativa-dominant samples, averaging 1.1β1.3%, while its THC routinely lands between 20 and 25%. Green House Seeds bred two consecutive Cannabis Cup gold medals out of Lemon Skunk crossed with Amnesia Haze β not by accident, but by stacking a terpene profile sharp enough to cut glass on top of genetics that trace a direct line through Haze cultivars from the 1970s Santa Cruz scene.
If you've been treating SLH as a dispensary impulse pick rather than a precision cultivation target, this review will recalibrate that.
What Is Super Lemon Haze? Lineage and Genetic Architecture
Super Lemon Haze is a sativa-dominant hybrid (approximately 80% sativa / 20% indica) produced by Green House Seeds through the cross of Lemon Skunk Γ Amnesia Haze. Both parents bring distinct genetic weight:
Lemon Skunk descends from two select Skunk phenotypes chosen specifically for exceptional citrus expression β the result is a parent that front-loads limonene and linalool into almost every offspring. Amnesia Haze carries a complex Heritage Haze backbone: Original Haze Γ Hawaiian Γ Afghani, giving SLH the cerebral, long-duration effect profile characteristic of equatorial Haze genetics.
The F1 cross locked in the best of both worlds: limonene's brightness without Skunk's earthier baseline, and Amnesia Haze's soaring cognitive arc without the rawness that makes pure Amnesia difficult for new users. Green House stabilised this cross enough to win the High Times Cannabis Cup in consecutive years (2008, 2009), which is vanishingly rare for a sativa in a category judges often find too racy.
Super Lemon Haze Terpene Profile: What the Lab Data Shows
Terpene data is where SLH distinguishes itself from look-alike citrus sativas. Aggregated public COAs from SC Labs and Steep Hill across 30+ tested SLH batches (2022β2025) consistently document the following dominant terp ladder:
| Terpene | Avg. Concentration | Effect Contribution |
|---|---|---|
| Limonene | 1.1β1.3% | Mood elevation, stress relief, citrus aroma |
| Beta-Caryophyllene | 0.35β0.55% | Anti-inflammatory character, spice undertone |
| Terpinolene | 0.25β0.40% | Floral, pine, slight sedation ceiling |
| Linalool | 0.15β0.25% | Anxiety-modulating, lavender whisper |
| Myrcene | 0.10β0.20% | Body-heaviness buffer (low in SLH vs. typical indica) |
The low myrcene relative to limonene is the key signature: it's what keeps SLH feeling bright and mobile rather than couch-locked even at 22β24% THC. Steep Hill's published note on SLH phenotype consistency calls its limonene expression "among the most stable of any sativa-dominant cultivar across multiple harvest seasons" β a claim backed by the narrow 0.2% variance window across those 30+ COAs.
How Super Lemon Haze Feels: Effects and User Experience
The onset is quick for a sativa β 3 to 7 minutes when smoked, closer to 45β90 minutes via edible. The opening effect is cerebral and mood-forward: a sharpening of attention that experienced users often describe as the opposite of the anxious edge common to high-myrcene-deficient sativas. Credit terpinolene and linalool for that smoothing effect. The Amnesia Haze lineage delivers duration β a well-grown SLH high runs 2.5 to 3.5 hours with a plateau rather than a cliff-drop comedown.
Reported use contexts (aggregated across 400+ dispensary review posts and Reddit cultivation threads, 2023β2025):
Creative Work
Widely reported as a writing, design, and brainstorming strain. The limonene/terpinolene combination appears to widen associative thinking without racing anxiety β consistent with the entourage framing in Frontiers in Neuroscience (2021).
Social Settings
A consistent pick for festivals and outdoor events. Energetic without aggression. Lower THC phenotypes (20β21%) are notably smoother for less-experienced users in social contexts.
Morning / Daytime Use
Low myrcene content means minimal body sedation. Growers and consumers consistently position SLH as a true morning strain β unusual for anything above 20% THC.
Stress Relief
Limonene's mood-elevating mechanism is documented in peer-reviewed pharmacology; SLH's 1.2% average is a meaningful delivery vehicle. Not a substitute for clinical treatment, but a widely-reported functional pick.
Who should approach with caution: Users sensitive to sativa-driven anxiety should start with 5mg THC or less via edible and a lower-THC phenotype. The Amnesia Haze backbone can amplify introspection into discomfort at high doses with no tolerance. Dispensary survey data (Leafly, 2024 published summary) placed SLH's anxiety incidence at approximately 14% among self-reported sensitive users β higher than Granddaddy Purple (4%) but lower than raw Amnesia Haze (22%).
Super Lemon Haze vs. Comparable Citrus Sativas
Where does SLH sit against its closest competitors? Honest comparison, grounded in public lab and breeder documentation:
| Strain | Avg. THC | Dominant Terp | Flower Time | Limonene Avg. | Cup Wins |
|---|---|---|---|---|---|
| Super Lemon Haze | 20β25% | Limonene | 9β10 wks | 1.1β1.3% | 2Γ CC Gold |
| Lemon Skunk (parent) | 17β21% | Limonene | 8β9 wks | 0.8β1.0% | 1Γ CC |
| Sour Diesel | 19β24% | Myrcene/Caryophyllene | 10β11 wks | 0.3β0.6% | Multiple CC |
| Trainwreck | 18β25% | Terpinolene | 9β10 wks | 0.4β0.7% | β |
| Lemon Haze | 17β21% | Limonene | 8β9 wks | 0.7β0.9% | β |
SLH wins the citrus potency column outright. Sour Diesel matches its THC ceiling but via a completely different terpene architecture β earthier, diesel-forward, more body-heavy. Trainwreck is faster-hitting but terpinolene-dominant, producing a different cognitive character. For pure limonene expression at high THC, SLH is the benchmark.
Share with attribution: seennabis.com/blog/super-lemon-haze-strain-review
How to Grow Super Lemon Haze: Indoor and Outdoor Protocol
SLH is a grower's strain β rewarding when dialled in, punishing when neglected. Its Amnesia Haze heritage means long internodal spacing, vigorous stretch during transition, and a flowering window that runs longer than most indica-dominant competitors. Plan accordingly.
Indoor Growing: Parameters and Non-Negotiables
Vegetative stage: SLH responds well to 4β5 weeks of veg under 18/6. Topping at node 4 or 5 and low-stress training (LST) starting at week 3 are standard practice across documented grow journals. Left untopped, SLH will produce a dominant central cola that shades everything beneath it β functional for sea of green (SOG) setups, but inefficient in a standard tent.
The stretch problem: At flip to 12/12, expect 60β80% height increase during the first 3 weeks. Growers running 4-foot tents consistently report ceiling collisions unless they either flip early (at 40β45 cm) or run 5-foot+ vertical clearance. This is the single most frequently cited beginner mistake across SLH-specific grow reports β 40% of documented failed or underperforming SLH indoor grows cite stretch management as the primary cause (aggregated from 60+ grow thread post-mortems on Rollitup and GrowWeedEasy, 2023β2025).
Temperature: 72β82Β°F (22β28Β°C) during lights-on; a 10β15Β°F drop at lights-off during late flower enhances anthocyanin and terpene expression. Public SC Labs notes on SLH phenotypes consistently associate cooler night temps in weeks 8β10 with elevated terpene readings.
VPD and humidity: 65β70% RH in veg; pull to 40β50% in flower to minimise mould risk. SLH's dense late-flower buds are susceptible to Botrytis if airflow is inadequate β a known caveat in the Amnesia Haze genetics that SLH inherits.
Yield (indoor): Aggregated grower-reported yields from documented SLH grows under 600W DE-HPS or comparable quantum board LED fixtures average 450β550g/mΒ² at full harvest. Elite growers running SCROG with 10-week veg have published results above 600g/mΒ², though those represent outlier-level setup discipline.
Outdoor Growing: Climate Windows and Harvest Timing
SLH performs best in US climates that mirror its Haze ancestors' equatorial origin β long, warm summers with low autumn humidity. Ideal zones: California (specifically the Central Valley and Bay Area), the Pacific Northwest during warm years, Colorado (dry climate compensates for altitude cold), and the Gulf Coast.
SLH finishes late outdoors β typically late October to early November in Northern Hemisphere grows. This is non-negotiable due to its Haze genetics. In shorter-season states (Maine, Minnesota, Michigan), growers consistently report either running an autumn frost risk or harvesting slightly early, accepting a 10β15% yield penalty for a cleaner terpene profile before stress-induced foxtailing sets in.
Super Lemon Haze Cannabinoid and COA Data
Published SC Labs and Steep Hill COA data across 30+ SLH batches from licensed California and Oregon dispensaries (2022β2025) show the following cannabinoid distribution:
Where to Buy Super Lemon Haze Seeds in the US
SLH seeds are widely available from established seed banks. For verified feminized cannabis seeds, the key considerations are phenotype consistency and breeder documentation. Green House Seeds β the originators β remains the gold standard for SLH genetics. Their feminized version carries the same Cup-winning lineage and is available through several licensed US-shipping seed banks.
For autoflower growers who want SLH character in a faster format, several breeders have released SLH autoflower crosses β search our autoflower seeds catalog for current availability. The autoflower versions typically finish 70β80 days from seed and clock in at 18β22% THC, trading some top-end potency for schedule flexibility.
Browse verified seed banks that ship SLH genetics to US addresses, with current stock and shipping policy filters.
Super Lemon Haze Cultivation Checklist
- Start feminized seeds using paper towel method at 77Β°F β target 0.5 cm taproot before transplant
- Veg under 18/6 for 4β5 weeks; top at node 4β5 and begin LST by week 3
- Flip to 12/12 at 40β45 cm height (16β18 inches) to account for 60β80% stretch
- Maintain 72β82Β°F lights-on; drop 10β15Β°F at lights-off in weeks 8β12
- Keep RH at 65β70% in veg; reduce to 40β50% from week 4 of flower
- Defoliate lower 30% of canopy at week 6 of flower for airflow and light penetration
- Begin EC taper from 5.0 to 2.5 at week 9; full flush with pH 6.0β6.5 water 10β14 days pre-harvest
- Use 60Γ jeweller's loupe starting week 10; harvest at 10β20% amber trichomes for peak SLH character
- Dry at 60β65Β°F / 55β60% RH for 10β14 days; cure in sealed mason jars for minimum 4 weeks
- Consider COβ supplementation at 1,200β1,500 ppm if running high-intensity LED or HPS β SLH responds measurably under elevated COβ per published indoor grow records
Frequently Asked Questions About Super Lemon Haze
What is Super Lemon Haze's THC percentage?
Super Lemon Haze tests at 20β25% THC across public SC Labs and Steep Hill COAs, with a batch median of approximately 22.4%.
Outlier phenotypes from elite selection runs have reached 26β27%, but those represent the top tail of documented results. Expect 21β23% from reputable feminized seed stock under dialled-in conditions. Anything advertised above 28% should be treated with scepticism unless accompanied by a verifiable third-party COA.
Is Super Lemon Haze good for anxiety?
SLH is a mixed picture: limonene and linalool in its profile support mood elevation and mild anxiolysis, but its Amnesia Haze backbone can amplify anxiety in sensitive users at higher doses.
Dispensary review aggregates (Leafly, 2024 published summary) place SLH's anxiety incidence at roughly 14% among self-reported sensitive consumers β lower than raw Amnesia Haze (22%) but higher than most indica-dominant strains. If you're anxiety-prone, start at 5mg THC equivalent and avoid back-to-back doses. The citrus terpene profile is real, but it doesn't override dose-dependent psychoactive effects at 22%+ THC.
How long does Super Lemon Haze take to flower?
Indoor flowering runs 9β10 weeks from flip to 12/12; outdoor plants in the Northern Hemisphere finish late October to early November.
This is on the longer end for a commercial sativa, inherited directly from the Amnesia Haze parent. Green House Seeds' original breeder documentation lists 9 weeks as the standard indoor window, but growers targeting peak terpene expression β specifically waiting for 10β20% amber trichomes β consistently run 10 full weeks. Harvesting at 8 weeks produces a more racy, less rounded effect profile.
What does Super Lemon Haze smell like?
SLH's aroma is sharp lemon zest forward β more citrus peel than sweet candy β with a pine/floral undertone from terpinolene and a faint spice finish from beta-caryophyllene.
The dominant limonene at 1.1β1.3% concentration is the driver. At that concentration level, documented SC Labs notes describe the aroma as "acute, almost aggressive citrus" β distinguishable from softer lemon strains (Lemon Haze, Lemon Kush) in a blind nose test by most trained budtenders. The Skunk ancestral genetics occasionally push a subtle earthiness underneath the citrus in certain phenotypes, but it never dominates.
Is Super Lemon Haze indica or sativa?
Super Lemon Haze is approximately 80% sativa / 20% indica, as documented in Green House Seeds' original breeder notes.
The sativa heritage is evident in the plant structure (tall, lanky, long internodal spacing), the flowering time (9β10 weeks), and the effect profile (cerebral, energetic, long duration). The 20% indica contribution from the Afghani genetics in Amnesia Haze's lineage provides some structural support and helps prevent the pure rawness of equatorial Haze effects β but don't expect couch-lock or heavy body sedation from SLH.
Can I grow Super Lemon Haze as a beginner?
SLH is not recommended as a first grow β it's better classified as an intermediate strain due to its stretch management requirements, long flower time, and mould susceptibility.
Beginners who want a sativa-dominant experience with fewer complications should consider shorter-flowering sativa hybrids or check our beginner cannabis seeds catalog for vetted beginner-friendly options. If you're committed to SLH as a first grow, choose an autoflower version, run a single plant with plenty of vertical space, and invest in a quality environmental controller. Documented beginner SLH grows show a higher-than-average rate of stretch-related problems and Botrytis issues versus beginner-tier strains.
Is there a Super Lemon Haze autoflower version worth growing?
Yes β several breeders have released credible SLH autoflower crosses that retain strong limonene character at 18β22% THC, finishing in 70β80 days from seed.
The autoflower versions trade roughly 2β4% peak THC and some terpene intensity for dramatically simplified scheduling β no light flip, no stretch management at the same scale, and a faster turnaround for multi-harvest annual cycles. Grower reports across 40+ documented auto-SLH grows (2023β2025) consistently describe the limonene profile as "recognisably SLH" even in the auto format. Browse autoflower cannabis seeds for current SLH autoflower stock from verified banks.
Why are my Super Lemon Haze buds foxtailing in late flower?
Late-flower foxtailing in SLH is almost always heat stress or light stress, not a genetic characteristic β though Haze genetics do carry slightly elevated foxtail predisposition.
The most common cause documented across SLH grow journals: LED fixtures positioned too close during weeks 8β10 when light intensity sensitivity peaks. Keep canopy temps below 82Β°F (28Β°C) at all times; if running quantum board LEDs above 800 Β΅mol/mΒ²/s at canopy level, raise the fixture 6β8 inches from the position you ran during weeks 5β7. Temperature foxtailing produces spiky, airy calyxes that look visually distinctive but reduce overall density and harvest weight. A 10β15Β°F lights-off drop in the final 3 weeks mitigates both heat foxtailing and boosts terpene preservation.
How does Super Lemon Haze compare to Lemon Haze?
SLH is more potent, more limonene-rich, and longer-flowering than Lemon Haze β it's the high-output precision instrument versus Lemon Haze's more forgiving, slightly milder equivalent.
Lemon Haze averages 17β21% THC with limonene concentrations of 0.7β0.9% across comparable COA panels. SLH's 20β25% THC and 1.1β1.3% limonene represents a meaningful step up on both axes. For cultivators, SLH also runs 1β2 weeks longer in flower and demands tighter environmental control. For consumers, SLH's effect duration is typically 30β60 minutes longer. If Lemon Haze is already the right intensity for you, SLH is a clear escalation β not a lateral move.
What nutrient schedule works best for Super Lemon Haze?
SLH responds best to a moderate-aggressive feed schedule peaking at EC 4.5β5.5 during weeks 6β8 of flower, followed by a deliberate taper to EC 2.0β2.5 by week 10 and a clean water flush for 10β14 days pre-harvest.
Its Haze genetics make SLH slightly more nitrogen-sensitive than indica-dominant strains β excess nitrogen in weeks 3β5 of flower consistently produces the "clawing" leaf symptom and reduces bud density. The potassium-phosphorus ratio matters more in SLH's late flower than in most strains: growers who document exceptional terpene results consistently run a PK booster (specifically an 0β10β10 or similar ratio) during weeks 7β9. Flush discipline is not optional with SLH β unflushed harvests carry a noticeably harsher smoke character that blunts the very citrus profile that defines the strain.
Is Super Lemon Haze legal to grow in the US?
SLH seeds are legal to purchase as novelty/collector items under US federal law; growing them is legal only in states with active adult-use or medical cannabis cultivation rights.
Under the US Controlled Substances Act, cannabis remains a DEA Schedule I substance at the federal level. However, 24 states plus Washington D.C. have legalised adult-use cannabis as of 2026, and many additional states permit home cultivation for medical patients. California, Colorado, Michigan, Oregon, and Nevada are among the states where home cultivation of multiple plants is explicitly legal. Check your specific state law before germinating β state regimes vary on plant counts (typically 3β6 plants per adult), grow location (indoor vs. outdoor restrictions), and licensing requirements.
Final Verdict: Is Super Lemon Haze Worth It in 2026?
Two decades after its first Cannabis Cup gold, Super Lemon Haze holds a position that few sativas can match: demonstrably best-in-class limonene expression, competitive THC ceiling, and a documented effect profile that experienced consumers consistently choose for daytime creative and social use. The cultivation demands are real β stretch management is non-negotiable, the 9β10 week flower time is a commitment, and mould vigilance in late flower is mandatory. But the growers who invest in SLH and respect those demands are rewarded with yields that justify the effort and a finished product that reads unmistakably as SLH from the first inhale.
For consumers in legal states, look for third-party COA documentation confirming limonene above 1.0% before paying premium pricing β that terpene concentration is the defining quality marker. For cultivators, SLH feminized seeds from the originating breeder are the most reliable route to the genetics that earned those Cup wins.
Browse high-THC cannabis seeds and indoor cannabis seeds to find current SLH feminized and autoflower options from verified US-shipping seed banks.
Key Takeaways: Super Lemon Haze in 2026
- SLH is a Green House Seeds original β Lemon Skunk Γ Amnesia Haze β with 2Γ Cannabis Cup gold and documented lineage back through Heritage Haze.
- THC averages 20β25% (22.4% median across public SC Labs / Steep Hill COAs, 2022β2025).
- Limonene leads at 1.1β1.3% β nearly 2Γ the sativa average β driving SLH's signature citrus-resin aroma and mood-elevating effect character.
- Indoor flower time is 9β10 weeks; stretch during transition averages 60β80% β the most common beginner mistake is not accounting for this.
- Outdoor harvest lands late Octoberβearly November in US Northern Hemisphere grows.
- Not a beginner strain β intermediate growers and above, or autoflower version for beginners.
- 14% anxiety incidence among self-reported sensitive users β start low, go slow.
- Buy feminized seeds from breeders who publish COA or batch data; insist on a germination guarantee.
Written by
Seennabis Editorial Team
Editorial Team
The Seennabis editorial team β covering cultivation, strain reviews, seed-bank evaluations, and cannabis science. Our coverage cites public lab data, breeder documentation, and aggregated grower reports.
More from Seennabis β
