Written by Ad OpsHistory and Breeding Origins
Auto Amnesia Haze sits at the crossroads of classic Dutch breeding and the modern autoflowering revolution. The core Amnesia Haze lineage traces to the early 2000s Amsterdam scene, blending Old-School Haze genetics with Southeast Asian (Thai/Cambodian) and Afghan influences to amplify resin and vigor. As autoflowering genetics matured after the pioneering Lowryder era (mid-2000s), breeders began translating flagship photoperiod strains into compact, faster, daylength-independent versions.
Bulk Seed Bank developed Auto Amnesia Haze by integrating ruderalis genetics into a selected Amnesia Haze parent, preserving the signature citrus-incense bouquet while compressing the lifecycle. Their version is typically feminized and designed to flower automatically under 18–24 hours of light, maturing without a photoperiod trigger. The result is a ruderalis/indica/sativa hybrid that respects the cerebral pedigree of Haze while offering practical grower benefits like quicker turnover and fewer light schedule constraints.
The aim of the auto project was to maintain the soaring, creative headspace while stabilizing growth patterns suited to small tents, balconies, and short outdoor seasons. Early auto iterations of Haze cultivars were notorious for lower potency and inconsistent phenotypes, but successive filial selection minimized those gaps. Today, modern Auto Amnesia Haze cultivars commonly deliver THC in the upper-teens to low-20s percentage range, rivaling or surpassing many photoperiods grown a decade ago.
By the late 2010s, Auto Amnesia Haze had become a staple in European and North American markets for growers wanting the unmistakable Haze profile without 12–14-week bloom times. Cycle compression to roughly 10–13 weeks seed to harvest is now common, enabling two to three outdoor runs per warm season at mid-latitudes. This historical arc—heritage Haze to efficient auto—encapsulates the broader evolution of cannabis breeding: retain identity, reduce friction, and boost access for small-space cultivators.
Genetic Lineage and Heritage
Auto Amnesia Haze from Bulk Seed Bank is explicitly a ruderalis/indica/sativa cross. The photoperiod Amnesia Haze backbone draws from Haze x Southeast Asian landraces (Thai, Cambodian/Laotian) crossed with Afghan lines that add resin density and structure. Incorporating a carefully selected ruderalis donor instills autoflowering traits while moderating height and shortening the total lifecycle.
In working the lineage, breeders typically backcross to the Haze side to preserve terpene complexity—especially the citrus-peel, incense, and wood polish notes associated with terpinolene-heavy spectrums. The indica influence subtly tightens internodes, increases calyx-to-leaf ratio, and enhances trichome coverage for dense, glistening buds. Ruderalis genetics add resilience and daylength independence but are kept proportionally lower to avoid diluting potency.
The overall chemotype remains sativa-leaning in effect despite a balanced botanical heritage. This is reflected in the terpene fingerprint (often terpinolene-limonene forward) and a cannabinoid profile that emphasizes THC with minimal CBD. The net phenotype is a compact, manageable plant with the spirit of classic Amnesia Haze, optimized for fast, reliable production.
Because Bulk Seed Bank’s selection prioritizes stability, most plants present uniform flowering windows and bud architecture suitable for indoor canopies. Phenotypic variance still exists—as with any seed-grown population—but the majority fall within predictable height, aroma, and finishing time ranges. This stability matters for autos, where extended veg manipulation is not an option.
Morphology and Appearance
Auto Amnesia Haze typically grows to 60–120 cm indoors and 80–140 cm outdoors, depending on pot size, light intensity, and environmental factors. The plant displays a sativa-leaning structure with a prominent central cola and strong lateral branches that benefit from gentle low-stress training. Internodal spacing is moderate, supporting a canopy that fills quickly under 18–20 hours of light.
Leaves are slender to medium-width, reflecting the hybridized lineage, and take on a deep green hue that can lighten slightly with vigorous metabolism. Buds are lime-to-emerald green with extensive trichome coverage, giving the flowers a frosted look even before full maturation. Pistils start a vivid tangerine and turn orange-amber as ripening progresses.
The calyxes are stacked and slightly elongated, sometimes expressing subtle foxtailing under intense light or high heat—a trait not uncommon in Haze-derived lines. The overall bud density is medium-high for a Haze hybrid, thanks to the Afghan influence balanced with ruderalis compactness. Sugar leaves remain relatively sparse, aiding trim speed and increasing bag appeal.
Under optimal conditions, resin heads are plentiful and bulbous, yielding a sticky hand-trim. The final product often showcases a high calyx-to-leaf ratio with glittering trichs that signal strong secondary metabolite production. Visual appeal holds up after cure, with trichomes retaining their structure when properly dried at 60/60 conditions.
Aroma and Bouquet
The bouquet leans unmistakably Haze: citrus-zest brightness layered over sweet floral incense and dry wood. Freshly ground buds release a surge of lemon, lime, and sweet orange, often accompanied by a hint of green mango or ripe melon. Secondary notes include cedar shavings, black pepper, and a slight herbal coolness reminiscent of eucalyptus or mint.
At mid-flower, the garden can smell like candied citrus with a piney, solvent-clean top note. By late flower, the profile deepens into resinous incense, like a citrus cologne paired with dry spice and faint earth. The interplay of terpinolene, limonene, and caryophyllene produces both brightness and depth, making the aroma complex and persistent.
Curing amplifies the sweeter facets and attenuates any raw green edges. After 3–4 weeks in jars, many growers report a rounded orange-lime candy nose with polished wood and gentle pepper. Terp retention is strongest when dried 10–14 days at 15–16°C and 58–62% RH, then cured at 16–20°C and 58–62% RH with daily burps in week one.
Flavor and Palate
On the inhale, Auto Amnesia Haze is zesty and clean, with flashes of lemon oil, sweet lime, and a floral sparkle. The mid-palate brings a sweet herbal quality, similar to basil and lemongrass, with moments of tropical fruit. Exhale finishes dry and spicy with cracked pepper, cedar, and a lingering, slightly bitter citrus pith that keeps the profile crisp rather than sugary.
Vaporization at 175–190°C tends to highlight the terpinolene-limonene bouquet and reduces throat bite. Combustion ramps up peppery caryophyllene and woody undertones while diminishing delicate floral top notes. Many users report the flavor remains impressively intact through the bowl, a sign of robust terpene density.
In concentrates, the Haze character becomes sharper and more aromatic, often leaning hard into citrus polish and pine cleaner. Live rosin and hydrocarbon extracts can concentrate terpenes to 4–8% by weight, delivering a fast, electric citrus blast. For flower, terpene totals of 1.5–3.0% by weight are common with competent cultivation and careful post-harvest handling.
Cannabinoid Profile and Potency
Modern Auto Amnesia Haze phenotypes commonly test at 18–22% THC when grown under optimized indoor conditions. Exceptional runs may touch 22–24% THC, while outdoor or low-light grows often land between 15–18% THC. CBD is typically <1.0%, frequently in the 0.1–0.5% window, leaving the chemotype firmly THC-dominant.
Minor cannabinoids provide nuance: CBG often registers around 0.3–1.0%, and CBC can appear at 0.1–0.4% in mature samples. The overall cannabinoid sum in well-grown flower usually ranges from 18–25%, depending on maturation, phenotype, and handling. Autos historically lagged behind photoperiods in potency, but improvements in selection and cultural practices have narrowed the gap significantly.
Potency is influenced by daily light integral (DLI), nutrient balance, and harvest timing. For example, achieving a DLI of 35–45 mol·m⁻²·day⁻¹ in late flower with PPFD around 700–900 µmol·m⁻²·s⁻¹ and 18–20 hours of light can support upper-range THC outcomes. Harvesting when 5–10% of trichomes turn amber with the bulk cloudy tends to maximize psychoactive intensity while preserving a bright, uplifting character.
Terpene Profile and Minor Aromatics
Auto Amnesia Haze often expresses a terpinolene-dominant profile, a hallmark of classic Haze lines. Limonene follows closely, reinforcing citrus brightness, while beta-caryophyllene adds pepper and grounding spice. Supporting terpenes frequently include ocimene (sweet herbal), myrcene (earthy, musky fruit), alpha- and beta-pinene (pine, resin), and humulene (woody, hop-like dryness).
Typical terpene totals fall between 1.5% and 3.0% by dry weight for carefully grown flower. Individual constituents often present approximately as: terpinolene 0.4–0.9%, limonene 0.3–0.7%, beta-caryophyllene 0.2–0.5%, with ocimene/pinene/myrcene collectively filling 0.3–0.8%. These ranges vary by phenotype, environment, and curing protocol but provide a realistic snapshot of the cultivar’s aromatic intensity.
Minor aromatics such as linalool, fenchol, and borneol can appear in trace to low amounts, adding floral-lavender hints and camphoraceous lift. When grown in cooler late-flower conditions (night temps 16–18°C), terpene retention tends to improve, often elevating the perceived citrus-sweetness. Proper drying (10–14 days at roughly 15–16°C, 58–62% RH) and curing consolidates these volatiles into a polished, layered bouquet.
Experiential Effects and Use Patterns
Users consistently describe Auto Amnesia Haze as cerebral, energetic, and focus-enhancing, particularly in the first hour. The onset after inhalation is rapid—usually 2–10 minutes—with a bright, clean headspace and uplifted mood. Many report elevated creativity and a tendency toward conversation, music appreciation, and task engagement.
Despite the energy, anxiety can emerge at higher doses due to the low CBD/THC ratio and terpinolene-forward profile. Newer consumers often find 1–3 inhalations sufficient, especially with 18–22% THC flower; moderation helps avoid racing thoughts. Body load is generally light, with minimal couchlock compared to indica-dominant autos.
Duration is commonly 2–3 hours for inhaled routes, with a taper into calm clarity rather than heavy sedation. For microdosing, a single 0.05 g session of 20% THC flower nominally contains ~10 mg THC, although inhalation bioavailability ranges widely (10–35%). As a result, many users prefer to “creep dose,” spacing hits over 15–20 minutes to dial in the sweet spot.
Compared with nighttime strains, Auto Amnesia Haze excels in daytime slots—creative work, social outings, or active hobbies. It pairs well with outdoor walks and studio sessions where sensory detail and momentum matter. For some, a late-afternoon session can bridge productivity to relaxation without torpor, though sensitive users should avoid close to bedtime.
Potential Medical Applications
THC-dominant, sativa-leaning chemovars like Auto Amnesia Haze are often explored for mood elevation and fatigue resistance. Anecdotal reports and observational data suggest potential benefits for low mood, anhedonia, and stress-related rumination, where uplift and task initiation are needed. The energizing terpene blend (terpinolene, limonene, pinene) may support perceived alertness and mental clarity in some users.
Users also report relief from tension headaches, mild neuropathic discomfort, and stress-linked muscle tightness, though analgesic effects are moderate compared to myrcene- and linalool-heavy indica-dominant cultivars. Appetite stimulation is variable—some experience mild increase, others neutral effects—reflecting the stimulating nature of the chemotype. For nausea, rapid-onset inhalation may help in acute episodes, but individual responses vary widely.
Because CBD is typically <1%, those prone to THC-induced anxiety or palpitations should approach slowly and consider CBD supplementation. Medical consumers often start with very small inhaled doses—one or two puffs—assessing effects over 10–15 minutes before escalating. As always, patients should consult a qualified clinician, especially when using cannabis alongside other medications or in the presence of anxiety disorders.
For daytime symptom management, Auto Amnesia Haze offers an alternative to sedating options, potentially aiding ADHD-like inattentiveness or motivational deficits in anecdotal contexts. However, evidence remains preliminary, and effects are highly individual. Tracking outcomes with a simple journal—dose, route, timing, symptom scores—can improve consistency and safety.
Comprehensive Cultivation Guide
Lifecycle and timing: Auto Amnesia Haze typically finishes in 70–90 days from sprout, with many phenotypes harvesting at 75–85 days. Indoors, this enables 4–5 crop cycles per year per space; outdoors at 40°N latitude, growers can often achieve two to three runs between late spring and early fall. Autos flower regardless of light cycle, but 18–20 hours of light daily maximizes biomass and resin.
Yield expectations: Indoors, expect 400–550 g/m² under high-efficiency LEDs when environmental and nutritional parameters are dialed in. Outdoors or on balconies, 50–150 g per plant is typical in 11–20 L containers, with 150–200 g possible in ideal Mediterranean climates. Height commonly reaches 60–120 cm indoors and 80–140 cm outdoors; pot size, root aeration, and light intensity are major drivers.
Germination and seedling: Maintain 22–26°C and 95–100% substrate saturation for initial hydration without waterlogging. Many growers use a 12–24-hour soak followed by a light, airy medium to prevent damping-off. Because autos dislike transplant shock, sow directly into the final container—11–18 L for best yield, or 7–9 L for compact grows.
Media and pH: In soil, target pH 6.2–6.8 with 20–30% perlite or pumice for aeration; in coco, maintain pH 5.8–6.2 and 20–30% perlite. A classic indoor mix is 60% coco, 30% perlite, 10% worm castings for balanced cation exchange and early nutrition. Living soil works well but avoid overly hot mixes; autos prefer a moderate, steady feed rather than heavy early nitrogen.
Nutrition and EC: Start light—EC 0.8–1.0 in early veg (days 7–21), then 1.1–1.3 during early flower set (days 21–40). Ramp to 1.3–1.6 EC in mid-to-late flower (days 40–75), watching for tip burn as the ceiling. Keep nitrogen moderate after day ~28 and emphasize phosphorus and potassium from day 35 through 65; silica at 50–100 ppm supports stem strength and stress resilience.
Irrigation strategy: Water to roughly 10–15% runoff in coco to manage salts; in soil, water thoroughly, then allow the top 2–3 cm to dry before the next cycle. Autos prefer frequent, modest irrigations rather than big swings; aim for consistent substrate oxygenation. Consider pulse irrigation or automated drip in coco to stabilize EC, pH, and moisture.
Lighting: Provide 600–900 µmol·m⁻²·s⁻¹ PPFD in mid/late flower for best results; beginners can target 500–700 PPFD with excellent outcomes. With 18–20 hours of light, a DLI of 35–45 mol·m⁻²·day⁻¹ is a realistic performance window. Keep fixture distance appropriate to avoid foxtailing and bleaching; watch leaf-edge tacoing as an early heat/light stress cue.
Environment and VPD: Day temps 24–28°C and night 18–22°C are ideal; maintain vapor pressure deficit around 0.9–1.2 kPa in veg and 1.2–1.5 kPa in flower. In late flower, allow RH to drop to 45–50% to reduce botrytis risk while preserving terpenes. Moderate airflow around and through the canopy is mandatory for resin quality and disease prevention.
Training and canopy management: Apply low-stress training (LST) from days 14–28 to open the canopy and spread tops evenly. Avoid topping after day ~18–21 from sprout; autos have a fixed clock and can lose yield if overly stressed. Gentle defoliation—removing a few large, light-blocking fan leaves around days 28–42—improves light penetration without stalling growth.
CO2 and advanced controls: If sealed, 900–1200 ppm CO2 can increase photosynthesis and yield when PPFD exceeds ~700 µmol·m⁻²·s⁻¹ and all other parameters are optimized. Keep temperature on the higher side of the range with elevated CO2 to maintain VPD balance. For most hobbyists, good environmental stability and even LST provide the bulk of gains without added complexity.
Outdoor scheduling: In temperate regions, start the first run as soon as frost risk passes and night temps stay above 10–12°C. A second run can start mid-summer; some growers squeeze a third with fast phenotypes. Choose full-sun locations—autos respond strongly to cumulative photons—with wind protection to keep stems upright.
Pest and disease management: Haze-derived flowers are resinous and can be dense; botrytis pressure increases above 55% RH with poor airflow. Implement IPM: yellow/blue sticky cards, weekly scouting, and beneficials such as Hypoaspis miles for gnats and Phytoseiulus persimilis for spider mites. Neem or peppermint-based sprays are fine in veg but avoid foliar applications on forming buds; use biologicals early and often rather than reactively.
Deficiency and toxicity cues: Excess nitrogen manifests as deep, glossy leaves and delayed bud set—a common auto pitfall. Magnesium deficiency can appear under strong LED lighting; supplement Mg at 30–50 ppm if interveinal chlorosis presents on mid leaves. Watch potassium in mid-to-late bloom for dense flowers and terpene expression; K deficiency shows as leaf-edge burn and marginal necrosis.
Harvest timing: Most phenotypes finish when trichomes are mostly cloudy with 5–15% amber depending on desired effect. For a brighter, racier profile, harvest near 5% amber; for a touch more body, 10–15% amber is typical. Flush 5–10 days in soil or 3–7 days in coco, monitoring runoff EC to avoid a harsh mineral taste.
Drying and curing: Target 15–16°C and 58–62% RH for a 10–14 day dry, keeping minimal air movement over buds to prevent case hardening. Cure in glass at 58–62% RH for 4–8 weeks; burp daily in week one, then 2–3 times weekly, tapering to weekly. Proper post-harvest handling preserves terpene totals in the 1.5–3.0% range and locks in the citrus-incense profile.
Performance benchmarks: With strong LED lighting, balanced nutrition, and dialed climate, 1.0–1.5 g/w is achievable in optimized environments. Under moderate inputs, 0.6–1.0 g/w is a solid target for new growers. These figures assume 18–20 hours of light, effective LST, and minimal plant stress throughout the cycle.
Practical tips: Start in the final pot to avoid shock, keep early feeds gentle, and prioritize light intensity and canopy balance over aggressive training. Monitor VPD closely—autos respond quickly to environmental improvements, and small tweaks compound over a 75–85 day lifecycle. Above all, remember that stress avoidance is yield: every day of uninterrupted momentum translates to denser colas and louder terpenes.
