Written by Ad OpsIntroduction to Amnesia Hashplant
Amnesia Hashplant is a mostly sativa cultivar developed by Oregon Green Seed, a breeder known for stabilizing robust, outdoor-ready genetics suited to the Pacific Northwest. The strain blends the cerebral electricity of classic Amnesia-type sativas with the resin-forward, hash-centric density of old-world hash plant lineage. The result is a plant that marries uplift and clarity with a satisfyingly substantial finish, all while offering growers a hardy frame and above-average resin output.
Among consumers and cultivators, Amnesia Hashplant has a reputation for fast-onset mental stimulation and long-legged effects that persist for two to three hours after inhalation. Third-party lab results reported by growers typically place its total THC in the 18–24% range, with CBD commonly below 1% and total terpenes between 1.2–2.5%. These metrics position it as a potent but manageable daily driver for experienced users, and as a high-yielding, mold-aware option for cultivators in temperate climates.
Because it is sativa-leaning, the strain responds well to training and tends to stretch 1.5–2.0x after the switch to 12/12, though its hash plant ancestry moderates internodal distance and boosts trichome coverage. In sensory terms, expect bright citrus, sweet herbal incense, cedar shavings, and hashy spice layered over a faint floral sweetness. This profile aligns with terpinolene- and limonene-forward chemotypes accented by beta-caryophyllene, ocimene, and humulene.
History and Origins
Oregon Green Seed (OGS) developed Amnesia Hashplant as part of its program to combine proven European sativa lines with rugged, resinous Afghan-derived stock. OGS is known for work that performs in the Pacific Northwest’s cooler nights and wet autumns, and this strain reflects that philosophy through its relatively quick finish and good botrytis awareness for a sativa-leaning variety. The name points directly to the parental archetypes: an Amnesia-style sativa and a hash plant that contributes structure, resin, and ripening speed.
Amnesia-type sativas trace back to Haze and Skunk influences that became popularized across the Netherlands in the 1990s and 2000s. Hash plant genetics, in contrast, descend from Afghan landrace material selected for dense bracts, quick setting of resin heads, and heavy, spicy aromatics. By bridging these two, OGS sought a cultivar that energizes the mind like Amnesia but finishes with the tactile, sticky resin coverage that rewards both flower consumers and extractors.
Although exact parental clone IDs can vary by batch and generation, community grow logs consistently describe phenotypes that lean sativa in structure yet pack glandular trichomes reminiscent of Afghan selections. In markets where the strain has been tested, the reported flowering window of 63–70 days aligns with a moderated sativa timeline rather than the 10–12 weeks often associated with pure Haze-leaners. That balance makes it attractive to growers who need the Amnesia headspace without a protracted cycle.
Genetic Lineage and Breeding Rationale
As its name implies, Amnesia Hashplant typically arises from an Amnesia-leaning sativa crossed to a hash plant-type indica, delivering a hybrid that is mostly sativa in both effect and growth habit. The Amnesia side commonly brings terpinolene-driven citrus, bright herbal notes, and an uplifting, creative high with strong headroom. The hash plant side contributes a compact floral cluster, denser bract stacking, and pronounced resin head production that translates into tactile stickiness and solid extraction yields.
From a breeder’s standpoint, the rationale centers on harmonizing three goals: accelerate ripening, increase resin mass, and maintain high-spirited effects that have made Amnesia lines global classics. Oregon Green Seed’s approach typically emphasizes stabilization over multiple filial generations to keep phenotypes within a desirable window of variability. The result in Amnesia Hashplant is a population where most plants express sativa dominance in effect but present a more manageable frame for indoor or greenhouse production.
With sativa:indica dispositions commonly reported around 70:30, the strain avoids the overlong internodes and late finish of pure haze lines. Yet it keeps enough Afghan influence to secure trichome density, improved calyx-to-leaf ratio, and better wind and weather tolerance outdoors. This genetic equation helps explain its popularity among small-scale craft growers seeking both heady jars and resin that presses into flavorful rosin.
Morphology and Appearance
Amnesia Hashplant typically grows with a medium-to-tall stature, showing strong apical dominance if left untopped. Internodes are moderately spaced at 5–9 cm under strong light, which is tighter than many haze-leaners but looser than squat indicas. After the flip to 12/12, expect 1.5–2.0x vertical stretch, making early training or screen support advisable in tents and rooms under 2.2 m tall.
Buds form as elongated colas with speared tips, and side branches carry multiple golf ball to banana-shaped clusters that merge late in flower. Calyces swell notably in weeks 6–9, developing a calyx-to-leaf ratio that makes trim relatively straightforward compared to leafier sativas. Trichome coverage is generous, with bulbous capitate-stalked heads that lend a frosted sheen under white LEDs.
Coloration trends toward lime to forest green bracts with amber-to-copper pistils as harvest nears. Cooler nights in late flower (16–18°C) can coax faint lavender accents in some phenotypes, though deep purpling is uncommon. Stems are fibrous yet flexible, and silica supplementation improves their ability to carry long, resin-laden colas without lodging.
Aroma and Bouquet
The bouquet opens with a burst of lemon-lime and sweet orange peel layered over herbaceous, slightly floral top notes. Beneath that citrus canopy lies a cedar-and-incense heart reminiscent of sandalwood shops, betraying the Amnesia lineage’s terpinolene character. As the flowers mature and cure, a thread of peppery spice and hashish resin rises, especially when the bracts are lightly warmed between fingers.
On grinding, the aromatic profile becomes more complex, unspooling lemongrass, green mango, and a whisper of eucalyptus. The hash plant influence adds a warm, earthy sweetness and faint tobacco-leather tone that gives the nose depth rather than simple brightness. Total terpene content reported by growers often lands between 1.2–2.5% by weight, which is perceptibly aromatic without being overwhelming in small spaces.
In rooms, late-flower plants can be moderately loud; a carbon filter rated at 1–2 air changes per minute usually keeps odor in check. In jars, the scent evolves over a 4–8 week cure from sharper citrus into a rounder, incense-citrus melange. Terpinolene, limonene, and beta-caryophyllene typically headline the mix, with supporting roles from ocimene and humulene.
Flavor Profile
The first draw delivers bright citrus—think sweet tangerine and lemon zest—quickly followed by herbal pine and a clean, woody nuance. On the exhale, a peppered hash note emerges, tying the experience together with a soft, resinous finish that lingers on the palate. Many users also report a faint floral sweetness, akin to orange blossom or chamomile, especially after a long cure.
Vaporization at 175–185°C emphasizes the terpinolene-forward citrus and spruce tips while muting some of the heavier, spicy undertones. Combustion brings out more of the beta-caryophyllene pepper and humulene wood, creating a fuller, incense-like impression. Across formats, the flavor retains clarity through the session and resists rapid palate fatigue.
For extraction, cured-resin or live rosin from this cultivar tends to preserve the citrus-incense balance, with typical rosin yields in the 18–25% range from well-grown, properly cured flower. Bubble hash yields of 3–6% of dried material are common, and those fractions often express bright top notes that cut through heavier bases in blends. As the name suggests, the hash plant contribution supports strong flavor carryover into concentrates without losing the sativa sparkle.
Cannabinoid Profile and Potency
Lab results shared by growers and dispensaries commonly place Amnesia Hashplant’s total THC between 18–24%, with peak phenotypes occasionally exceeding 25% under optimized conditions. CBD usually measures below 1%, often in the 0.05–0.4% range, consistent with modern sativa-dominant hybrids. Minor cannabinoids such as CBG are typically present at 0.3–1.2%, with trace CBC detectable in some samples.
Inhaled onset for THC-dominant flower is generally felt within 1–5 minutes, with a peak at 15–30 minutes and a total duration of 2–3 hours for most users. Edible preparations extend onset to 30–120 minutes and duration to 4–8 hours depending on dose and metabolism. First-time consumers should approach at 5–10 mg THC equivalents, while experienced users often find 10–25 mg comfortable; above 30 mg the risk of adverse effects like anxiety increases notably.
Potency is modulated by harvest timing: pulling at mostly cloudy trichomes with minimal amber often yields a racier top end, whereas 10–15% amber can soften the edge and deepen body presence. Cure quality also matters; terpenes can augment perceived potency by modulating THC’s subjective effects. Total terpene loads above 1.5% frequently correlate with stronger flavor and a more saturated effect profile even at the same THC percentage.
Terpene Profile and Chemistry
The dominant terpene expression in Amnesia Hashplant trends toward terpinolene and limonene, which together explain the citrus-grassy lift and piney freshness. Beta-caryophyllene commonly rounds the profile with peppered spice and potential CB2 receptor activity, while ocimene and beta-myrcene add green mango, herbal, and slightly musky undertones. Humulene often contributes a woody, hoppy dryness that shows up on the finish.
Quantitatively, well-grown samples often present 0.3–0.8% terpinolene, 0.2–0.5% limonene, and 0.15–0.4% beta-caryophyllene by dried weight, adding to a total terpene content of 1.2–2.5%. Myrcene levels typically sit in the 0.1–0.3% bracket, lower than heavy myrcene cultivars, which keeps the effect bright rather than overly sedative. Ocimene, though volatile, may register 0.05–0.2%, contributing to the sweet, green lift on the nose.
These terpene distributions are consistent with Amnesia-leaning sativas that retain a haze heritage while layering in Afghan hash plant density. Variability exists between phenotypes and environments, as terpenes respond to light intensity, temperature, and nutrition. Cooler late-flower nights, gentle handling, and a slow cure at 58–62% RH help preserve the more delicate monoterpenes that define its top-end aroma.
Experiential Effects and Consumer Reports
Consumers often describe Amnesia Hashplant as a clear, energetic, and creative headspace that arrives quickly and ramps smoothly. The mental effect frequently includes enhanced focus, idea flow, and sociability without the jitteriness of some sharper hazes. As the session progresses, a calm body presence creeps in from the hash plant side, taking the edge off while maintaining alertness.
At moderate doses, many report uplifted mood and task engagement suitable for daytime activities, brainstorming, or outdoor recreation. At higher doses, the experience can become introspective and immersive, particularly if consumed in quiet environments. Individuals sensitive to sativa-dominant strains should start low; a rapid spike in heart rate and anxiety can occur if overconsumed, especially in unfamiliar settings.
Typical onset is minutes for inhalation, with a 2–3 hour tail and a gentle landing compared to highly racy sativas. The cultivar’s consistent terpene signal provides a reliable flavor cue that pairs well with coffee, citrus-forward teas, and light snacks, which some users leverage to shape set and setting. Across user reports, the strain earns high marks for productivity and daytime-friendly clarity when dosed appropriately.
Potential Medical Applications and Considerations
While individual responses vary, Amnesia Hashplant’s uplifting effect profile may be appealing for people seeking help with low mood, fatigue, or motivational deficits. Uplifted, terpinolene-forward chemotypes have been reported by patients to support daytime function and concentration, though controlled clinical evidence remains limited. For some, a modest body relaxation later in the curve can help with tension-type discomfort without overt sedation.
In general cannabis research, THC-dominant products have shown benefit for certain chronic pain conditions, with meta-analyses reporting meaningful reductions in patient-reported pain intensity compared to placebo. Beta-caryophyllene’s CB2 affinity has been explored for its potential anti-inflammatory effects, and limonene has been studied for anxiolytic-like properties in preclinical settings. However, translating these findings to a specific cultivar must be done cautiously; dose, route, and individual neurochemistry are decisive factors.
Patients considering this strain should note its relatively low CBD and potentially brisk cerebral onset, which can provoke anxiety in susceptible individuals. For dose-finding, starting with 1–2 inhalations or 2.5–5 mg THC in oral formats and titrating slowly is a prudent approach. Those on medications that interact with the cytochrome P450 system should consult a clinician, and individuals with a history of psychosis should avoid high-THC products.
Comprehensive Cultivation Guide: Environment and Media
As a mostly sativa bred by Oregon Green Seed, Amnesia Hashplant appreciates moderate warmth, steady airflow, and sufficient vertical control. Indoors, target day temperatures of 24–28°C in veg and 22–26°C in flower, with night drops of 2–4°C to maintain internode control. Maintain RH at 60–70% for seedlings, 55–65% in veg, 50–55% early flower, and 42–48% for the final three weeks, aiming for VPD of 0.8–1.2 kPa (veg) and 1.2–1.5 kPa (flower).
Under LED, provide PPFD of 350–500 µmol·m⁻²·s⁻¹ for early veg, 500–700 for late veg, and 800–1,050 in flower; this equates to a DLI of roughly 20–30 mol·m⁻²·d⁻¹ in veg and 45–55 in flower. If running PPFD above ~900, supplemental CO2 at 800–1,200 ppm can boost photosynthetic capacity and yield. Keep canopy leaf temps around 25°C under LED to avoid hidden cold-stress that slows terpene biosynthesis.
In soil, a buffered medium with 20–30% aeration (perlite or pumice) helps the roots breathe, while coco or hydroponic systems can accelerate growth with tighter EC control. Target pH ranges of 6.2–6.8 in soil, 5.7–6.2 in coco, and 5.7–6.1 in hydro help maximize nutrient availability. Given its sativa lean, root-bound stress can induce stretching and uneven canopy; pot up proactively to 11–19 L containers indoors or 75–150 L outdoors for vigorous plants.
Comprehensive Cultivation Guide: Nutrition and Irrigation
Nutritionally, Amnesia Hashplant responds well to a balanced program, with slightly higher nitrogen in veg and increased potassium in mid-to-late flower. A 3-1-2 NPK ratio in veg and 1-2-3 in bloom is a workable baseline, adjusted by tissue feedback. Typical EC targets are 0.8–1.2 mS/cm for seedlings, 1.4–1.8 in veg, 1.8–2.2 in early flower, and 2.0–2.4 in late flower, with runoff monitored to avoid salt buildup.
Calcium and magnesium are especially important under LED; maintain a Ca:Mg ratio around 2:1 and supply 50–75 ppm Mg via magnesium sulfate if leaf-edge yellowing or interveinal chlorosis appears. Silica at 50–100 ppm strengthens stems and mitigates abiotic stress, which is valuable for a cultivar that carries long colas. Sulfur, often overlooked, supports terpene synthesis; ensure adequate elemental sulfur or sulfate inputs throughout the cycle.
Watering cadence should favor full pot saturation followed by a dryback to roughly 50–60% pot weight before the next irrigation in soil or coco. In coco/hydro, frequent smaller irrigations with 10–20% runoff maintain stable EC and root oxygenation. Avoid chronic overwatering; sativa roots appreciate oxygen and will punish anoxic conditions with slow growth and susceptibility to pathogens.
Comprehensive Cultivation Guide: Training, Canopy, and IPM
Because Amnesia Hashplant stretches 1.5–2.0x, structural training is essential for even canopies. Top or FIM at the 5th–6th node, then employ low-stress training to spread the mains horizontally under a screen for SCROG. Two toppings and a light defoliation before flip usually produce 8–12 productive colas per plant in 11–15 L containers.
During weeks 3–4 of flower, perform a lollipop and selective leaf removal to improve airflow and light penetration. Avoid aggressive late defoliation; keep enough solar panels to maintain carbohydrate supply during bulking. Trellis layers spaced 20–30 cm apart prevent lodging and make late-flower management safer.
For IPM, scout weekly with yellow and blue sticky cards, and inspect leaf undersides for mites and thrips. Predatory mites such as Amblyseius swirskii and Neoseiulus californicus, along with Orius insidiosus for thrips, create a strong biocontrol backbone. Alternate between microbial foliar tools like Bacillus subtilis and Beauveria bassiana during veg, and cease foliar sprays by the end of week 2 of flower to protect trichomes.
Powdery mildew risk climbs in dense canopies; keep leaf surface temps within 1–2°C of air temps and ensure 0.3–0.5 m/s gentle airflow across the canopy. Maintain cleanliness, remove plant debris swiftly, and sanitize tools between plants. Outdoor growers should space plants generously and orient rows to prevailing winds to reduce microclimate humidity.
Flowering, Harvest, Drying, and Curing
Indoors, Amnesia Hashplant typically finishes in 63–70 days of 12/12, with most phenotypes ready around day 66–68 once cloudy trichomes predominate. Outdoors in temperate zones, expect late September to mid-October harvest windows, with the hash plant influence helping avoid an overly late finish. Stretch management early on pays dividends in tighter, more light-efficient canopies by mid-flower.
Ripeness is best judged by trichome heads: for a bright, cerebral profile, harvest at ~5% amber and 90% cloudy; for a rounder effect, wait for 10–15% amber. Pistil color alone can mislead, as environmental factors brown hairs independent of resin maturity. Aroma peaks as citrus-incense intensifies; when the scent turns from sharp to slightly sweet and rounded, resin heads are often at their best.
Dry at 18–20°C and 55–60% RH with gentle, indirect airflow for 10–14 days until small stems snap rather than bend. Aim for final flower moisture of 10–12% and water activity of 0.55–0.65 before jarring. Cure for 4–8 weeks at 58–62% RH, burping daily in week one and tapering to weekly as the chlorophyll edge fades and the bouquet deepens.
For extraction, fresh-frozen material processed as live hash often captures the brightest terpinolene notes. If pressing rosin, keep plates at 85–95°C for 60–120 seconds to safeguard volatile monoterpenes and minimize oxidation. With cured flower, a gentle 90–100°C press usually balances yield and flavor integrity.
Yield Expectations, Resin Production, and Economics
Indoor yields typically range from 450–600 g/m² under 600–800 W LEDs, with advanced growers and CO2 supplementation seeing 600–700 g/m². Grams-per-watt figures of 1.5–2.0 are common under dialed conditions, potentially reaching 2.2 g/W in high-efficiency rooms. Outdoors, single plants in rich soil and full sun can produce 700–1,200 g per plant, provided canopy size and season length are adequate.
Resin production is a standout feature, as the hash plant side drives dense trichome fields and robust heads that withstand gentle agitation. Dry-sift and bubble hash yields of 3–6% of dried biomass are typical, while rosin from cured flower commonly returns 18–25% by weight. These extraction-friendly statistics make the cultivar attractive for dual-purpose grows targeting both top-shelf flower and solventless SKUs.
From an economic lens, the combination of strong yield potential and above-average bag appeal boosts revenue per square meter. By maintaining consistent quality—optimized dry/cure, tight trim, and terpene retention—growers can command higher price tiers, especially in markets that reward citrus-incense profiles. In small-scale craft settings, balancing canopy density with airflow often marks the difference between average and premium returns.
Comparisons to Related Strains
Compared to classic Amnesia Haze, Amnesia Hashplant finishes faster and carries denser bract stacks, with a less spindly architecture and easier trim. The effect is similarly uplifting but slightly less racy at equal dose, thanks to the grounding influence of the hash plant parent. Flavor-wise, it centers on citrus and incense rather than the brighter lemon-lime zest alone.
Against a pure Hash Plant, this cultivar is more elevating and mentally expansive, trading some couch-lock for functional clarity. The bouquet is fresher and more floral-herbal on top, while still retaining that warm, spicy resin core when ground. Growers accustomed to Hash Plant’s minimal stretch should plan for the 1.5–2.0x rise seen here and trellis accordingly.
When measured against Super Silver Haze, Amnesia Hashplant’s terpene emphasis skews more toward terpinolene-limonene and less toward metallic haze and catty notes. Yields are competitive, with similar grams-per-square-meter potential but generally easier post-harvest handling. For extractors, the resin head integrity sits closer to Afghan-influenced cultivars than wispy sativa types.
Additional Cultivation Tips and Troubleshooting
Phenotypes that lean heavily sativa may show magnesium hunger under strong LED; preempt with 50–75 ppm Mg and monitor new growth for interveinal fade. If leaves taco upward in early flower, check VPD and light intensity; a PPFD above ~1,050 without CO2 often triggers photoinhibition stress. If terpenes seem muted post-harvest, reassess dry room RH and airflow; overdrying below 50% RH often collapses top-end monoterpenes.
Buds becoming too dense late in flower can raise botrytis risk; increase lateral air movement and keep late-flower RH below 48%. If stretch gets away from you, supercrop during the first two weeks post-flip to flatten the canopy and redirect auxin flow. For outdoor growers in humid regions, selective leafing and wider plant spacing (at least 1.5–2.0 m centers) reduce leaf-surface wetness time.
Nutrient burn typically shows as leaf-tip necrosis and canoeing; pull back EC by 0.2–0.3 mS/cm and ensure adequate runoff. If pistils brown early without calyx swell, check for pest pressure and confirm that night temperatures are not dropping below 14–15°C. For taste optimization, cease nitrogen-heavy feeds by week 5–6 of flower and favor K, S, and micronutrients that support terpene pathways.
Responsible Use and Safety Notes
High-THC, low-CBD cultivars can be intense for new users; start with low doses and wait to assess effects before redosing. Avoid operating vehicles or machinery while under the influence, and be mindful that edibles can take 30–120 minutes to peak. Hydration, a calm environment, and balanced snacks can help mitigate transient overconsumption discomfort.
If anxiety arises, breathing exercises and a quiet space are often helpful; CBD-dominant products may take the edge off for some users. Individuals with cardiovascular concerns should discuss cannabis use with a healthcare professional due to potential transient increases in heart rate. Store products securely and out of reach of children and pets.
Legal status varies by jurisdiction; cultivate and consume only where permitted by law. For medical use, consult a clinician familiar with cannabinoid therapeutics to tailor dosing and delivery methods. Keep product labels, test results, and batch data for reference and accountability.
Closing Thoughts
Amnesia Hashplant, bred by Oregon Green Seed, succeeds in blending the sparkling clarity of Amnesia-line sativas with the resin heft and practical finish of hash plant genetics. Its 63–70 day flowering window, 450–600 g/m² indoor yield potential, and 18–24% THC range make it both commercially viable and compelling for home growers. The sensory signature—citrus, incense, cedar, and hashy spice—carries beautifully from jar to rosin.
For cultivators, discipline in canopy control, environment, and late-flower humidity management unlocks its best expression. For consumers, mindful dosing reveals a versatile daytime strain that uplifts without overwhelming, given respect for its potency. Whether trimmed for connoisseur flower or pressed into solventless, Amnesia Hashplant stands out as a balanced, sativa-forward classic with modern grower sensibilities.
Ultimately, it is this harmony—electric headspace, resin-forward structure, and manageable cultivation—that defines the cultivar. In the hands of attentive growers and thoughtful consumers, Amnesia Hashplant demonstrates why well-aimed hybridization remains the engine of progression in cannabis. It is a testament to how careful breeding can refine legacy effects into reliable, flavorful, and productive modern genetics.
