Sativa80% Sativa / 20% Indica20–25% THC

Amnesia Haze

Also known as: Amnesia H, Ammy Haze

Breeder: Soma Seeds (Soma's Sacred Seeds)

Amnesia Haze is a legendary sativa-dominant polyhybrid that became synonymous with top-shelf coffeeshop cannabis in Amsterdam during the 2000s. Bred by Soma around 2003, it combines landrace genetics from across the globe into a complex, resinous plant that delivers an intense, almost psychedelic cerebral euphoria. Its name references the transcendent clarity that causes everything else to temporarily fade. Despite a demanding 12–13 week flowering period, the strain rewards patient growers with exceptional yields of aromatic, trichome-laden buds. It remains a benchmark sativa against which modern cultivars are measured. Amnesia Haze represents Soma Seeds' masterwork—a complex genetic tapestry drawing from the finest tropical sativa lines on Earth. The Southeast Asian varieties (Thai, Cambodian, Laotian) provide the electric cerebral high and complex terpene expression. The Jamaican Haze contributes sharp flavor and high THC. The Afghani-Hawaiian genetics shorten the flowering time (from what would otherwise be 16-20+ weeks) and improve structural integrity without sacrificing the sativa character. THC ranges 20-25% with approximately 1% CBD. The terpene profile is complex: bright citrus and lemon dominate, with earthy, floral, and incense-like undertones. The effect is powerfully cerebral—clean, energetic euphoria with creative stimulation and social openness. Despite its name, "Amnesia" doesn't refer to memory loss but to the strain's ability to make you forget stress and negative thoughts. Soma notes the Southeast Asian varieties used in the cross are his "all-time favourites," and the resulting hybrid demonstrates his philosophy of breeding for the connoisseur experience rather than maximum yield or shortest flowering time.

Lineage

Afghani Hawaiian x Laos x Jamaican Haze x

THC Range

20–25%

Flower Time

12-13 weeks

Difficulty

Moderate to Hard

Lineage & Genetics

Cross: Afghani Hawaiian x Laos x Jamaican Haze x Thai x Cambodian

Afghani Hawaiian provides indica-influenced structure and a shorter flowering window via Afghani landrace crossed with Hawaiian sativa. The Southeast Asian component (Thai sticks, Cambodian, Laotian landraces) contributes the soaring psychoactive ceiling and complex terpene expression. Jamaican Haze adds the signature sharp flavor and high THC percentage characteristic of Caribbean sativa lines.

Lineage Dispute

SeedFinder lists the simplified cross as 'Afghani Hawaiian x Laos x Jamaica.' Soma himself describes it as Southeast Asian (Thai, Cambodian, Laotian) + Jamaican Haze + Afghani-Hawaiian. A separate strain called 'Original Amnesia' (Hy-Pro/Zwiep) is Neville's Haze x Afghani ('Enemy of the State') and is frequently conflated with Soma's Amnesia Haze in Amsterdam coffeeshops. Alchimia reports a theory that an American breeder first crossed Thai/Jamaican/Hawaiian with Afghani, naming it 'Amnesia,' which was then taken to Holland by Sam the Skunkman and crossed with Neville's Haze by Zwiep. Barney's Farm lists it simply as Jamaican x Thai x South Asia x Cambodia.

Terpene Profile

DOMINANT

Terpinolene — Complex floral-citrus-pine character with herbal freshness

DOMINANT

Myrcene — Earthy, herbal base complementing pine resin notes

SECONDARY

Limonene — Citrus zest pairing with pine for a fresh, clean profile

SECONDARY

Caryophyllene — Woody pepper complementing evergreen notes

SECONDARY

Ocimene — Sweet, herbaceous with tropical and woody undertones

SECONDARY

Humulene — Woody, hoppy notes complementing resinous pine

Aroma: Immediately recognizable: sharp lemon-citrus peel over damp earth, with layers of incense, sandalwood, cedar, and fresh pepper. Some phenotypes express more herbal/floral terpinolene notes while others lean into a sweeter citrus-mango profile. Nose intensity is high and lingers.

Flavor: Bright lemon zest on the inhale with earthy, spicy undertones on the exhale. Mid-palate reveals sandalwood and cedar complexity. Finish is peppery with residual citrus sweetness. Some phenos show tropical mango notes. Smoke is smooth but expansive.

Effects & Experience

Onset: Fast-acting cerebral rush within 2–5 minutes. An immediate wave of mental clarity and elevated mood that feels electric and expansive.

Intensely euphoric and cerebral. Highly energizing with strong creative stimulation and enhanced focus. Often described as psychedelic or trippy at higher doses. Some users with ADHD report a paradoxical calming focus. The head-high dominates with minimal body sedation until the tail end.

Duration: Long-lasting: 2–3 hours of peak cerebral effects tapering into a gentle, relaxed comedown. Total duration 3–4 hours.

Commonly Reported Uses

Creative projectsSocial gatheringsMorning/daytime useDepressionFatigueStress reliefADHD focus

Grower's Notes

Flower

12-13 weeks

Indoor Yield

Up to 600 g/m²

Outdoor Yield

700-1000 g/plant

Difficulty

Moderate to Hard

Height / Stretch

Medium-Tall (80-140cm indoor)

Environment

Indoor, Greenhouse, Mediterranean outdoor

Amnesia Haze by Soma Seeds is a sativa-dominant powerhouse (70% sativa / 30% indica) built from a complex 5-way cross incorporating Thai, Cambodian, Laotian, Jamaican Haze, and Afghani-Hawaiian genetics. It won the High Times Cannabis Cup in 2004 and again in 2012, establishing itself as one of the most awarded and influential Haze cultivars in modern history. This is a strain for the patient, experienced cultivator—the long flowering time is the price of admission for one of cannabis's finest expressions.

The commitment begins with understanding the timeline: Amnesia Haze requires 12-13 weeks of flowering. Some phenotypes can push to 14 weeks or, in rare fussy expressions, up to 20 weeks. This is not a typo—it is the reality of growing a complex tropical sativa hybrid. Plan your grow calendar accordingly. The payoff is substantial: indoor yields up to 600 g/m² of multiple-award-winning flower that commands premium pricing.

Growth Structure and Training

In veg, the plant grows with moderate vigor and develops a medium-tall frame (80-140 cm indoors). Vegetative growth is standard—nothing exceptional here. Use an 18/6 schedule with 400-600 PPFD. The plant responds well to topping and training but doesn't require the extreme measures that pure sativa landraces demand. The indica influence from the Afghani-Hawaiian parent provides structural support and moderate internodal spacing.

Growth Structure and Training

When flipped to 12/12, expect a significant stretch (2-2.5x) over the first 3-4 weeks. This stretch can surprise growers unfamiliar with Haze behavior. Plan canopy height management: flower early (when plants are 16-20 inches) or have substantial vertical space. SCROG works excellently, with the screen filling during the extended stretch period.

Environment and Climate

The true challenge of Amnesia Haze is maintaining optimal environmental conditions for 12-13 consecutive weeks of flower. Temps: 72-78F daytime, 65-70F nighttime. Humidity must remain at 40-50% for the entire flower cycle—any spikes during weeks 8-12 risk bud rot in the maturing colas. Long-running carbon filters need monitoring or replacement at week 8-9 as the pungent citrus-earth Haze aroma intensifies through the extended bloom.

Nutrient Management

Nutrient management over 12-13 weeks requires careful monitoring. Start bloom nutrients at moderate EC (1.2-1.5) and gradually build through week 6-7 to peak demand (1.8-2.2 EC). Begin reducing feed intensity around week 10-11. A final flush of 7-10 days before harvest ensures clean ash and pure terpene expression. Salt buildup is a common issue in such long cycles—run occasional plain-water feeds and monitor runoff EC weekly.

Bud Structure and Trichomes

The buds develop slowly but satisfyingly. Dense, long colas with thin leaves form along the branches, becoming increasingly crystallized as weeks progress. The trichome development in weeks 10-13 is spectacular—the final 2-3 weeks produce a dramatic increase in resin coverage. Do not harvest early thinking the buds look done at week 10; the extra weeks provide both yield (bulk continues building) and terpene complexity.

Environment and Climate

Outdoors, Amnesia Haze demands a warm Mediterranean or tropical climate with a season extending through October-November. It will not finish in northern climates with early frost. Southern Spain, California, northern Africa, and northern Australia produce outstanding results. Plants can reach 175-250 cm outdoors with enormous yields.

Sensitivity note

this strain is susceptible to cold stress, pests, and irregular irrigation. It needs consistent care throughout its extended lifecycle. Not a "set and forget" variety.

History & Origin

Developed by Soma (Soma's Sacred Seeds) in Amsterdam around 2003. Soma combined his favorite Southeast Asian landraces (Thai sticks, Cambodian, Laotian) with Jamaican Haze for THC potency and sharp flavor, then introduced Afghani-Hawaiian genetics to shorten flowering time and enhance taste. The strain won the overall High Times Cannabis Cup in 2004 through Barney's Breakfast Bar, which sourced the genetics directly from Soma — it became one of Barney's best sellers and cemented the strain's coffeeshop legend. By the mid-2000s, Amnesia Haze dominated Dutch coffeeshop menus. Some historical confusion exists because a clone-only 'Original Amnesia' (Hy-Pro/Zwiep, circa late 1990s — Neville's Haze x Afghani) was already circulating in Amsterdam under similar names. Soma's seed version and the Hy-Pro clone became conflated in coffeeshop culture, both simply called 'Amnesia.' The strain continued winning cups through the 2010s, taking 1st Place Sativa at the 2012 High Times Cannabis Cup under Soma's own name.

Awards & Recognition

●1st Place — High Times Cannabis Cup 2004 (Overall, via Barney's Breakfast Bar)
●1st Place — IC 420 Growers Cup 2006, Sativa Breeders Cup (Soma Seeds)
●1st Place — High Times Cannabis Cup 2012, Sativa Cup (Soma's Sacred Seeds)
●1st Place — Spannabis Cannabis Champions Cup 2012, Hydro (Natural Shop)
●1st Place — Santa Cruz Cup 2012, Outdoor Sativa (Surf City)
●1st Place — Highlife Cup 2012, Hydro Haze (Guna Guna)
●1st Place — Highlife Cup 2011, Cannabis Cup / Best Cannabis ('t Bunkertje)
●2nd Place — IC 420 Growers Cup 2007, Sativa Breeders Cup (Soma Seeds)
●2nd Place — Highlife Cup 2019, Hydro Haze (Coffeeshop 't Bunkertje)

Notable Crosses

Strains bred using Amnesia Haze as a parent:

Amnesia Lemon— Amnesia Haze x Skunk #1

Amnesika 2.0— Amnesia Haze x Critical Mass

Amnesia Haze x Zombie Kush— Ripper Seeds; Kush density meets Haze clarity

Amazing Haze— Amnesia Haze x Caramella

Amnesia Ganja Haze— Amnesia Haze x Silver Buddha Haze

A.A.A.— Amnesia Haze x Amnesia Haze x Black Domina/Ruderalis

Frequently Asked Questions

7 common questions about Amnesia Haze

What is Amnesia Haze and what are its genetics?

Amnesia Haze is a sativa cannabis strain (80% Sativa / 20% Indica) bred by Soma Seeds (Soma's Sacred Seeds). It is a cross of Afghani Hawaiian x Laos x Jamaican Haze x Thai x Cambodian, testing at 20–25% THC. Amnesia Haze is a legendary sativa-dominant polyhybrid that became synonymous with top-shelf coffeeshop cannabis in Amsterdam during the 2000s. Bred by Soma around 2003, it combines landrace genetics from across the globe into a complex, resinous plant that delivers an intense, almost psychedelic cerebral euphoria.

What does Amnesia Haze smell and taste like?

Amnesia Haze's dominant terpenes are Terpinolene, Myrcene. The aroma is described as immediately recognizable: sharp lemon-citrus peel over damp earth, with layers of incense, sandalwood, cedar, and fresh pepper. some phenotypes express more herbal/floral terpinolene notes while others lean into a sweeter citrus-mango profile. nose intensity is high and lingers.. The flavor profile features bright lemon zest on the inhale with earthy, spicy undertones on the exhale. mid-palate reveals sandalwood and cedar complexity. finish is peppery with residual citrus sweetness. some phenos show tropical mango notes. smoke is smooth but expansive..

What are the effects of Amnesia Haze?

Fast-acting cerebral rush within 2–5 minutes. An immediate wave of mental clarity and elevated mood that feels electric and expansive. Intensely euphoric and cerebral. Highly energizing with strong creative stimulation and enhanced focus. Duration is typically long-lasting: 2–3 hours of peak cerebral effects tapering into a gentle, relaxed comedown. total duration 3–4 hours.. Commonly reported uses include Creative projects, Social gatherings, Morning/daytime use, Depression.

How hard is Amnesia Haze to grow?

Amnesia Haze is rated moderate to hard difficulty. It flowers in 12-13 weeks, reaches medium-tall (80-140cm indoor) in height, and yields up to 600 g/m² indoors. Best suited for indoor, greenhouse, mediterranean outdoor environments.

What are the parent strains of Amnesia Haze?

Amnesia Haze is a cross of Afghani Hawaiian and Jamaican Haze x Laos. Afghani Hawaiian provides indica-influenced structure and a shorter flowering window via Afghani landrace crossed with Hawaiian sativa. The Southeast Asian component (Thai sticks, Cambodian, Laotian landraces) contributes the soaring psychoactive ceiling and complex terpene expression.

What strains were bred from Amnesia Haze?

Amnesia Haze has been used as a parent in several notable crosses, including Amnesia Lemon, Amnesika 2.0, Amnesia Haze x Zombie Kush, Amazing Haze, Amnesia Ganja Haze. Its genetics contribute to a wide range of modern cultivars.

Has Amnesia Haze won any cannabis awards?

Yes. Amnesia Haze has received recognition including 1st Place — High Times Cannabis Cup 2004 (Overall, via Barney's Breakfast Bar); 1st Place — IC 420 Growers Cup 2006, Sativa Breeders Cup (Soma Seeds); 1st Place — High Times Cannabis Cup 2012, Sativa Cup (Soma's Sacred Seeds).

Sources & References (24)

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