Written by Ad OpsIntroduction and Overview
Amnesia is a mostly sativa strain bred by Forum Genetics, celebrated for its energetic clarity and unmistakable Haze-forward personality. In European dispensaries and coffeeshops, Amnesia is often shorthand for a zesty, cerebral daytime smoke that pairs focus with buoyant mood. The phenotype offered by Forum Genetics keeps the lineage squarely in the sativa camp, emphasizing long, elegant colas, a shimmering terpene bouquet, and a heady yet navigable high.
Consumer reports consistently describe Amnesia as uplifting, creative, and talkative, aligning closely with the classic Haze effect profile. Leafly entries for Amnesia and its close relative Amnesia Haze summarize these outcomes as giggly, euphoric, and social, with high THC and low CBD values as a defining feature. This rare combination makes Amnesia a favorite for early productivity, brainstorming sessions, or friendly gatherings where verbal flow is prized.
In modern markets, lab results often place Amnesia’s THC in the very high tier, and SeedSupreme lists comparable Haze-based offerings at over 20% THC with CBD usually 0–1%. The result is a strain that can feel deceptively potent, especially for novice users. While the high is light-footed and stimulating, approaching it with measured doses ensures the most enjoyable experience.
History and Breeding Origins
Forum Genetics is credited with this particular Amnesia lineage, preserving the Haze family’s reputation for bright, inspiring effects. While many consumers know the name through Amnesia Haze and other descendants, the Forum Genetics expression of Amnesia leans into a European tradition that shaped coffeeshop menus in the 2000s. The breeder’s focus has been on maintaining a clean, precise sativa profile while refining growth vigor and resin output.
Historical accounts frequently conflate Amnesia and Amnesia Haze, and that confusion is understandable given their overlapping flavor and mood signatures. CannaConnection describes Amnesia Haze as a predominantly sativa super strain with near-psychedelic powers, a description that lines up with Amnesia’s mental brightness and sensory saturation. Over the years, seedmakers have spun new variations like Amnesia Lemon and Amnesia x AK-47, extending the family into new flavor and effect dimensions.
Even as new hybrids emerge, the core identity remains rooted in Haze genetics, which have dominated specialty menus for decades. Haze is synonymous with an uplifting, cerebral, and long-lasting experience, and Amnesia embodies that ethos with polish. Whether enjoyed in Europe’s renowned coffeeshops or in legal markets elsewhere, Amnesia’s name signals a reliably elevated tone and refined sativa character.
Genetic Lineage and Phenotypic Variation
Amnesia from Forum Genetics is a mostly sativa cultivar that draws heavily from the Haze family tree. While some cuts emphasize terpinolene-rich citrus and spice, others lean into floral and earth notes with a sweet, herbal core. Growers should anticipate a tall, stretchy plant with narrow leaflets, long internodes, and architecture optimized by training.
Phenotypic variation typically shows up in bud density, stretch intensity, and terpene emphasis. One phenotype may pack tighter calyx stacks with citrus-forward terpinolene and limonene dominance, while another expresses more myrcene and caryophyllene, nudging flavor toward earth and spice. Both share the electric sativa headspace, though the citrus-heavy selections often feel livelier and brisk in their onset.
Related crosses showcase Amnesia’s flexible genetics. Amnesia Lemon pushes bright, candy-citrus top notes and reports a more relaxing body element than classic Amnesia. Amnesia x AK-47 hybrids trend toward rounder effects and an approachable structure, but they still retain the heady clarity that defines the Amnesia name.
Appearance and Plant Morphology
Amnesia displays the classic sativa silhouette—upright posture, elongated branches, and narrow-fingered leaves that convey vigor. In vegetative growth, the plant is quick to stretch toward the light, and in flower it can double or even triple in height, especially without early training. Cola development tends to be vertical, with spears that stack calyxes in long columns.
Buds are medium to large and more elongated than golf-ball dense, although select phenotypes can form tighter clusters. Pistils start a light tangerine or peach and darken as the plant matures, while trichomes blanket calyxes until they appear frosted from a short distance. The resin heads are abundant, and a well-grown plant glitters under direct light, indicating robust terpene reservoirs.
Fan leaves generally remain a vibrant green with lean petioles and pronounced serrations, another Haze family hallmark. As flowering progresses, defoliation can open the canopy to boost light penetration, but restraint is key to avoid stress. Overall, the plant expresses graceful, sativa-forward lines, delivering a look that is both elegant and functional for high-light environments.
Aroma and Flavor Profile
On the nose, Amnesia greets with bright citrus peel, fresh herbs, and a hint of tropical sweetness that suggests a terpinolene-driven bouquet. Underneath the top notes, many cuts carry a green tea and basil nuance intertwined with sweet pepper from beta-caryophyllene. The finish leans floral and lightly woody, especially in phenotypes with ocimene and linalool accents.
The flavor tracks the aroma closely, layering lemon zest and sweet lime over a gentle earth-and-spice foundation. Vaporizing at lower temperatures, around 170–185°C, draws out a tangy fruit note with a clean exhale, while higher temperatures spotlight peppery spice and faint pine. Combustion tends to emphasize zest and herb, leaving a drying, resinous finish that lingers on the palate.
Compared to Amnesia Haze, the Forum Genetics Amnesia is equally zippy but often slightly less sweet and more herbal in the mid-palate. If you have tried Amnesia Lemon or citrus-forward Haze relatives, expect a familiar sparkle but with a broader, greener spectrum. With a proper cure, the bouquet is assertive but never cloying, remaining fresh for weeks when stored at 58–62% RH.
Cannabinoid Profile and Potency
Amnesia is commonly lab-tested at high THC with minimal CBD, a hallmark of modern Haze lines. Leafly’s Amnesia entry describes a high THC, low CBD profile, and SeedSupreme lists similar Haze cultivars with very high THC, often over 20%, and low CBD in the 0–1% range. In practice, expect Amnesia to test between 18% and 25% THC, with standout specimens pushing into the 26% range under optimal conditions.
CBD usually remains at trace levels, often below 0.5%, which concentrates the strain’s psychoactive edge. Minor cannabinoids can appear in meaningful yet modest amounts, including CBG around 0.1–1.0% and CBC around 0.05–0.3%, though these values fluctuate by phenotype and cultivation style. Total cannabinoids can surpass 22–26% when THC is in the mid-20s and minor cannabinoids accumulate.
Overall terpene content commonly lands between 1.5% and 3.0% by weight in dialed-in gardens. Higher terpene totals are associated with a richer flavor and a clearer, more dimensional effect. As always, potency and chemical expression are heavily influenced by light intensity, nutrition, and post-harvest handling.
Terpene Profile and Aroma Chemistry
The Haze family is known for a terpene pattern dominated by terpinolene, which correlates with cerebral clarity and light, sparkling mood effects. Leafly’s analysis of Haze-family terpenes highlights how terpinolene, ocimene, limonene, and caryophyllene interplay to create the classic euphoric and uplifting profile. Amnesia usually follows suit, with terpinolene often the lead terpene in lab panels.
Typical ranges in well-grown Amnesia show terpinolene at 0.3–1.0%, myrcene at 0.2–0.8%, and ocimene at 0.1–0.6%. Limonene and beta-caryophyllene commonly register between 0.1–0.5% each, with supporting roles from linalool, humulene, and pinene. Total terpenes above 2% frequently translate into a fuller mouthfeel and longer-lasting bouquet after grinding.
Beyond scent, terpenes may contribute functionally to the subjective experience. Limonene has been associated with mood-elevating properties in preclinical research, and beta-caryophyllene is a CB2 agonist studied for anti-inflammatory potential. The terpinolene-myrcene balance likely shapes Amnesia’s alert yet approachable tone, allowing a clear head with an aromatic veil that softens edgy edges.
Experiential Effects and Consumer Reports
Users typically report a swift onset with inhalation, moving from a light buzz behind the eyes to a full-spectrum head lift within 5–10 minutes. The Amnesia and Amnesia Haze pages on Leafly align on common themes of giggly energy, euphoria, sociability, and creative flow. The experience is often verbal and idea-driven, making it a frequent pick for daytime tasks that benefit from an imaginative tilt.
Side effects skew toward the classic sativa cautions—dry mouth, dizziness, and occasional paranoia—especially at higher THC doses. These negatives are noted on the Amnesia Haze page and are consistent with high-THC, low-CBD sativas. Beginners and those sensitive to THC should titrate carefully, waiting a few minutes between pulls to gauge intensity.
In terms of duration, the peak commonly lasts 60–90 minutes, with a taper that can extend total effects to 2–3 hours depending on metabolism and ingestion method. Edibles derived from Amnesia concentrate or flower will present a longer duration, often 4–6 hours, with a heavier landing as 11-hydroxy-THC metabolites accumulate. For social outings or brainstorming sessions, modest inhaled doses keep the experience crisp without veering into overstimulation.
Potential Medical Applications
Amnesia’s consistent mood elevation and stimulating effects make it a candidate for individuals seeking daytime relief from low motivation, mild depressive symptoms, or fatigue. Observational reports note improved outlook and increased task engagement, particularly in creative or planning-oriented work. The talkative nature reported by many users may also help with social anxiety in low doses, though high doses can backfire for sensitive individuals.
The terpene array suggests possible supportive roles beyond THC alone. Limonene has shown antidepressant-like effects in preclinical models, and beta-caryophyllene’s CB2 activity is being explored for inflammatory and neuropathic components. While robust clinical trials specific to Amnesia are lacking, the chemotype aligns with profiles often chosen for mood and energy.
Pain relief is generally mild for this cultivar unless paired with higher doses or combined with complementary cannabinoids. CBD microdoses alongside Amnesia may smooth anxious edges for some users, enhancing tolerability without dramatically dulling stimulation. As always, medical use should be discussed with a clinician, especially for those with a history of anxiety, cardiovascular conditions, or sensitivity to strong sativas.
Cultivation Guide: Environment, Medium, and Nutrition
Amnesia thrives in a warm, bright environment with steady airflow and moderate humidity. Aim for daytime temperatures of 23–28°C and nighttime temperatures of 18–22°C during flowering, with relative humidity stepping down from 60% in veg to 50% in mid-flower and 45% or lower late in bloom. Keep VPD around 0.9–1.2 kPa in veg and 1.2–1.5 kPa in mid-to-late flower for strong transpiration without stress.
Lighting intensity should be robust, but not overbearing during the stretch. Target PPFD around 400–600 μmol/m²/s in veg and 800–1,000 μmol/m²/s in flower, translating into a daily light integral of roughly 35–50 mol/m²/day. With supplemental CO2 at 800–1,200 ppm and adequate nutrition, experienced growers can push PPFD toward 1,100–1,200 μmol/m²/s while carefully monitoring leaf temperature and stress.
Amnesia performs equally well in soil, coco, and hydro with the right parameters. For soil, keep pH at 6.3–6.8; for coco and hydro, 5.8–6.2 is optimal. Start veg EC around 1.0–1.2 mS/cm, ramping to 1.6–2.0 mS/cm in late flower depending on cultivar hunger and environment.
Nutritionally, sativas like Amnesia prefer steady nitrogen in veg but do not require heavy overfeeding. Introduce silica for stronger stems and cal-mag supplementation when using RO water or coco. Favor phosphorus and potassium in bloom, particularly weeks 4–7, while ensuring micronutrients remain available to prevent interveinal chlorosis or tip burn.
Cultivation Guide: Training, Veg to Flower Transition, and Canopy Management
Amnesia stretches considerably, often 1.5–2.5x after the flip to 12/12, so early canopy control is essential. Top or FIM once or twice in veg, then deploy low-stress training to distribute branches across a wide footprint. A Screen of Green (ScrOG) is ideal for this cultivar, capturing vertical energy and converting it into lateral bud sites.
Defoliation should be measured and timed, focusing on removing big, light-blocking fans just before and during the first two weeks of flower. Avoid aggressive stripping late in bloom, as sativas can be sensitive, slowing bud development and reducing resin output. Keep the canopy flat to maintain even distance from light, since growers report that Haze lines can be susceptible to light burn at the topmost colas.
An anecdote from Amnesia Haze autoflower growers at SeedSupreme illustrates the point: tall architecture required tying down multiple limbs, and mild light burn occurred when tops crept too close to LEDs. Sensitivity to overfeeding was also noted, reinforcing the case for incremental EC increases rather than big jumps. Translate those lessons to photoperiod Amnesia by training early and feeding on the conservative side until the plant demands more.
Cultivation Guide: Flowering, Harvest Timing, Drying, and Curing
Flowering time for Amnesia runs about 9–11 weeks, with some phenotypes finishing closer to 12 weeks. The first two to three weeks bring vigorous stretch, followed by steady calyx stacking and a resin surge from weeks 6–9. By week 10, most plants exhibit cloudy trichomes with scattered amber heads, though preference dictates the final pull date.
For a bright, racy experience, many growers harvest when trichomes are 5–10% amber and mostly cloudy. If you want a bit more body weight and reduced edge, 10–20% amber increases perceived depth. Flush decisions should align with your medium and philosophy, but a 7–10 day runoff-only period in inert media can soften the smoke without starving the plant too early.
Dry slowly in 15–18°C air at 55–62% RH for 10–14 days, aiming for small stems to snap cleanly rather than bend. Cure in airtight jars or bins with 58–62% RH packs, burping daily the first week, then weekly for 4–8 weeks. A patient cure preserves terpinolene and ocimene volatility while rounding the peppery caryophyllene edge, producing a balanced, aromatic final product.
Yield varies by environment, training, and phenotype, but indoor gardens can expect roughly 450–650 g/m² under high-performance LEDs. Skilled growers with CO2 and aggressive canopy optimization can surpass 700 g/m² on select cuts. Outdoors in a Mediterranean climate, single plants exceeding 600–1,000 g are feasible with ample soil volume, full sun, and careful season-long IPM.
Outdoor and Autoflower Considerations
Outdoors, Amnesia prefers a long, warm season with abundant light and steady airflow. In the Northern Hemisphere, plan for an October harvest, often late October in cooler zones, given the 9–11 week flowering window. Guard against autumn moisture with proactive pruning, staking, and preventative biologicals to deter botrytis in denser colas.
Autoflower versions inspired by Amnesia genetics bring the same vertical enthusiasm on a compressed timeline. SeedSupreme grower notes for Amnesia Haze autoflower indicate significant height, tying down multiple limbs, sensitivity to overfeeding, and mild light burn when tops exceeded safe PPFD. Those insights apply broadly to Amnesia autos, which commonly finish in 10–11 weeks from seed with 80–150 g per plant in dialed-in indoor micro-gardens.
For autos, use gentle training early, avoid transplant shock by starting in the final container, and maintain moderate EC of 1.2–1.6 mS/cm in bloom. Keep PPFD near 600–800 μmol/m²/s for most of the life cycle, elevating only as the plant shows hunger and structural readiness. The goal is to channel sativa energy into controlled, resin-rich spears without triggering stress that stunts yield.
Pest, Disease, and Quality Control
Like many sativas, Amnesia’s airy leaf spacing improves airflow, but large colas can still invite bud rot if humidity spikes. Maintain oscillating fans across the canopy and prune inner growth to prevent stagnant pockets. A weekly integrated pest management routine using beneficial microbes, neem alternatives, or targeted biologicals can keep spider mites and thrips at bay.
Monitor canopy temperatures, as Haze-leaning lines do not appreciate excessive heat at the tops under high-intensity lighting. Leaf surface temperatures above ambient by more than 2–3°C can signal infrared overload or insufficient air movement. Using a thermal sensor or IR thermometer helps keep conditions in the sweet spot where resin and terpenes flourish.
Quality control in the final weeks has outsized impact on the finished product. Avoid late heavy feeds that leave mineral residue, and maintain consistent environmental set points to keep terpene synthesis on track. Properly dried and cured Amnesia displays a high-gloss trichome sheen, bright citrus-herbal nose, and a crisp smoke that confirms you nailed post-harvest handling.
Comparing Amnesia to Its Haze Relatives
Amnesia and Amnesia Haze often get mentioned in the same breath, and their chemical and experiential overlap is real. Leafly describes Amnesia Haze as giggly, euphoric, and talkative, which mirrors what fans report for Amnesia. Both skew high-THC with low CBD and shared Haze terpenes, especially terpinolene.
The differences appear in nuance. Some Amnesia cuts are slightly more herbal and green, while Amnesia Haze can lean a hair sweeter and fruitier on the top notes. In terms of structure, both are tall and stretchy, with Amnesia sometimes edging out in vertical vigor and requiring diligent early training.
Cousins like Amnesia Lemon bring zesty citrus dominance and a more pronounced body element that some describe as calming or even mildly narcotic. Hybrids like Amnesia x AK-47 demonstrate how the core Haze energy can be rounded by indica-leaning partners, shedding some of the sharp edges while preserving focus. These relatives underscore Amnesia’s role as a chassis for high-clarity, big-terp sativa experiences.
Responsible Use, Dosing, and Safety
Given THC levels commonly in the 18–25% range, Amnesia rewards careful dosing, especially for new users. Start with one or two small inhalations and wait several minutes, as onset compounds quickly with repeated pulls. For edibles made from Amnesia concentrates, 2.5–5 mg THC is a prudent entry point, with at least 90–120 minutes before considering more.
Side effects reported on Leafly for similar Haze strains include paranoia, dry mouth, and dizziness, most often at high doses or when dehydrated. Hydration and a calm setting reduce the odds of discomfort, and adding CBD can buffer intensity for some individuals. Those prone to anxiety or with cardiovascular concerns should consult a healthcare professional before using potent sativas.
For daytime function, aim for sub-perceptual microdoses that lift mood without disrupting focus. Many experienced users consider Amnesia a work-friendly strain in small amounts, while reserving heavier sessions for creative jams or social time. Respect the chemistry and the setting, and Amnesia returns a clear, buoyant, and memorable ride.
Key Takeaways and Buyer’s Notes
Amnesia by Forum Genetics captures the quintessential Haze uplift—fast, bright, and talkative—with THC most often above 20% and CBD typically under 1%. Terpinolene-led terpenes deliver citrus-herbal aromatics and a clean exhale, supported by ocimene, limonene, and caryophyllene. Effects align with Leafly’s profiles for Amnesia and Amnesia Haze, emphasizing euphoria, creativity, and sociability, with common cautions for paranoia and dry mouth at high doses.
Growers should expect significant stretch, excellent response to ScrOG and LST, and a 9–11 week flowering window. Indoor yields of 450–650 g/m² are realistic under strong LEDs, with outdoor plants hitting 600–1,000 g in the right climate. Autos inspired by this line can grow surprisingly tall, requiring tie-downs and careful feeding to avoid light burn and tip issues as reported by growers.
If you enjoy sativa dynamism with a refined, modern flavor profile, Amnesia is an excellent anchor strain for daytime use and for a garden where canopy craft matters. Seek cuts that test high in terpinolene for the brightest citrus pop and the most elevating head. With thoughtful dosing and a well-managed environment, Amnesia lives up to its reputation as a definitive, high-prestige sativa.
