What Are Amnesia Fast Seeds and How They Differ from Classic Amnesia Haze
Amnesia Fast Seeds are a fast-version feminized line that crosses the classic Amnesia Haze with a fast-flowering parent carrying a small ruderalis input. The goal is not to create an autoflower but to shorten the photoperiod flowering window from the punishing 10–11 weeks of original Amnesia down to roughly 6–7 weeks. Fast-version genetics retain full reaction to the 12/12 light switch, so the grower keeps total control over vegetative size and structure. For commercial gardens, this trims one to four weeks off every cycle without sacrificing the original terpene fingerprint.
The fast version of Amnesia was developed by European breeders chasing the same demand that produced fast-flowering Critical and Northern Light variants. Working from a stabilized Amnesia Haze cut, selectors crossed it with a Haze-leaning fast parent and back-bred for several generations until the seven-week flowering window held across nearly every phenotype. Early releases earned positive feedback from northern European gardeners who could finally finish a Haze-dominant plant before October rains, and the line now sits in most major seed bank catalogues as a staple sativa.
Amnesia Fast occupies a different niche from Amnesia Auto, classic Amnesia Haze and the supersized Amnesia XXL. The auto version finishes faster from seed but yields less and gives a softer high, while the original Haze yields heavily but locks the garden into an eleven-week bloom. Amnesia XXL pushes maximum weight at the cost of even longer flowering. Fast is the compromise pick: most of the Haze potency, most of the yield, but cut down in cycle length.
In numbers, Amnesia Fast typically tests at 20–22% THC, below 1% CBD, finishes flowering in 6–7 weeks and yields 500–600 g/m² indoor or 600–700 g per plant outdoor. The seeds are feminized photoperiod with accelerated bloom, recommended for soil, coco or hydro and rated easy-to-medium in difficulty. Beginners can manage it if they respect feeding limits, while experienced growers will appreciate how predictable the harvest timing becomes.
Fast-Flowering vs Autoflowering: Key Difference for Amnesia
True autoflowers shift into bloom based on age, ignoring the light schedule. Amnesia Fast still requires a 12/12 light flip to begin flowering, which means the grower decides exactly when the stretch starts and how tall the plant becomes. That single difference allows much larger harvests per plant and lets gardeners run mother plants and clones in the same way they would with the original Haze.
The ruderalis contribution in Amnesia Fast is intentionally minimal, isolated to the genes that accelerate flower initiation. The sativa-driven euphoric high is preserved, plants do not shrink to the dwarf size typical of autos, and the leaf-to-flower ratio still favors generous colas. For indoor SOG or ScrOG layouts this matters because every centimeter of canopy is used by full-sized, photoperiod-style colas rather than small auto-style buds.
Genetics and Lineage of Amnesia Fast Seeds
The parental stack behind Amnesia Fast Seeds combines a selected Amnesia Haze mother with a fast-flowering father carrying Haze and ruderalis influence. Original Amnesia itself descends from a Haze backbone crossed with Skunk and Cinderella 99, giving it citrus brightness, classic Haze spice and a sativa structure with elongated internodes. Layering the fast parent over this lineage preserves the dominant Haze expression while compressing bloom time.
The final hybrid leans roughly 70% sativa and 30% indica, with ruderalis present only as a flowering trigger rather than a phenotype driver. The sativa side dictates the energetic, cerebral effect and the tall, branchy growth pattern, while the indica fraction tightens internodes slightly and lends a bit more bud density than pure Haze plants ever achieve. After several generations of stabilization, modern Amnesia Fast packs show very uniform phenotypes with only minor variation in stretch and finishing time.
Cannabinoid content sits in the upper bracket for a fast-version strain. THC commonly tests between 20% and 22%, CBD remains under 1%, and minor cannabinoids such as CBG appear in modest concentrations typical of Haze-derived plants. The chemotype is classified as THC-dominant Type I, and side-by-side analysis usually shows Amnesia Fast trailing the original Amnesia Haze by only one or two THC percentage points — a small price for a four-week shorter bloom.
Terpene-wise, Amnesia Fast is dominated by terpinolene and ocimene, with mid-level myrcene and a touch of caryophyllene. This combination produces the citrus-pepper aroma associated with classic Haze, with secondary earthy and incense notes appearing as flowers cure. The terpene fingerprint remains unmistakably Amnesia, which is one of the main reasons growers pick the fast version over generic fast-flowering hybrids with diluted aroma.
Growing Amnesia Fast Seeds Indoors and Outdoors
Indoors, Amnesia Fast performs best with daytime temperatures of 22–26°C, humidity around 70% during seedling stage, dropping to 50% in mid-flower and 40% in the final two weeks. A light footprint of 600–1000 W HPS or an equivalent 400–600 W LED covers a square meter comfortably. The plant runs 18/6 in veg and switches to 12/12 to trigger flowering. Pot sizes of 15–25 liters in soil, coco or recirculating hydroponics all give strong results when feeding is dialed in.
Expect indoor heights of 80–120 cm after a moderate veg, and outdoor plants reaching 180–200 cm when planted directly in the ground. The sativa structure responds very well to topping at the fourth or fifth node and to low-stress training that opens the canopy. ScrOG screens turn the natural lankiness into an even, productive table, while SOG setups with shorter veg times suit commercial rooms that prize predictable internode spacing.
A typical full cycle runs 3–4 weeks of vegetative growth followed by 6–7 weeks of flowering, putting seed-to-harvest at roughly 10–11 weeks indoors. Outdoor harvests in the northern hemisphere usually land in the last week of September or first days of October, which is critical for northern European latitudes where October weather brings botrytis pressure. The fast cycle is the reason this strain is recommended for UK, Dutch, German and Polish outdoor gardens.
Mold resistance is moderate rather than exceptional, so airflow planning matters as colas thicken in the final two weeks. The strain reacts poorly to nitrogen overload during late veg and early flower, often showing tip burn and clawed leaves. It tolerates defoliation well when done at day 21 of bloom, and its overall stress resistance is high enough that minor transplant shocks or feeding mistakes rarely cost the harvest.
Recommended Nutrient Schedule for Amnesia Fast
During the vegetative phase Amnesia Fast wants a feed with high nitrogen, moderate phosphorus and moderate potassium. EC values of 1.2–1.6 mS/cm work well, with pH held at 6.0–6.5 in soil and 5.5–6.0 in hydroponics or coco. Feeding every second watering keeps salt buildup low and prevents the tip burn this strain is sensitive to.
In flower the ratio inverts: nitrogen drops, phosphorus and potassium climb, and EC rises gradually toward 2.0 by week four. A PK booster between weeks four and five fattens the upper colas, and a clean flush of pH-balanced water in the last 10–14 days is essential for preserving the citrus-pepper terpene profile. Calcium and magnesium need to be checked weekly because Haze-leaning plants will lock out fast under cal-mag deficiency.
Outdoor Climate Requirements
Amnesia Fast is ideally suited to Mediterranean and temperate continental climates that offer at least five to six hours of direct sun per day. It handles steady wind well provided the main colas are supported with stakes or netting, but extended autumn rain in late September can damage tight buds if the canopy is not opened up.
Guerrilla growers favor this cultivar precisely because the late-September harvest window allows them to retrieve plants before mold and frost arrive. The recommended seeding window in central and northern Europe is the last week of April through mid-May, with transplant into the open ground as soon as nighttime temperatures stay above 10°C. The fast cycle is what makes outdoor production realistic in UK, Netherlands and German latitudes.
| Parameter | Indoor | Outdoor |
|---|
| Flowering time | 6–7 weeks | Harvest end of September |
| Plant height | 80–120 cm | 150–200 cm |
| Yield per plant | 500–600 g/m² | 600–700 g/plant |
| Vegetative stage | 3–4 weeks | Natural until July |
| Temperature range | 22–26°C | 18–28°C |
| Humidity (flowering) | 40–50% | Ambient |
| Difficulty level | Easy–Medium | Medium |
Effects, Aroma and Flavor Profile of Amnesia Fast
The effect of Amnesia Fast is unmistakably sativa-dominant and strongly cerebral. Onset arrives within 5–10 minutes after inhalation, the peak euphoria settles in around 20–30 minutes, and the experience runs 2–3 hours before tapering off. Users describe a sharp lift in mood, easy creative flow, mental focus and a mild body relaxation that never crosses into couch-lock, making it the textbook example of a modern Haze high.
Aroma evolves through the grow. Living plants emit a bright citrus-lemon scent layered with pepper and a faint skunky undertone from the Skunk grandparent. Dried buds shift toward earth and pepper with citrus remaining on top, and combustion releases a sharp Haze incense note with citric tang. Smell intensity is high through veg and flower, so a carbon filter is mandatory for indoor stealth gardens and recommended for greenhouse runs near neighbors.
On the palate the inhale carries a clean lemon citrus note while the exhale shifts into peppery, spicy and faintly woody territory. Aftertaste leans earthy with a hint of sweetness that becomes more pronounced after a four-week cure. The clarity of flavor depends heavily on a proper two-week flush before harvest; rushed flushes leave a harsh edge that masks the signature lemon-incense complexity Amnesia Haze is known for.
Amnesia Fast is best used in the morning and afternoon, when its energizing edge fits productivity, social conversation, music sessions and creative work. It is a poor choice immediately before sleep because the racing mental tone outlasts the body relaxation. Common side effects include dry mouth, dry eyes and, at higher doses, transient anxiety in less experienced users, so newcomers are advised to start with a single small inhalation and wait fifteen minutes before redosing.
- Strong cerebral euphoria. An uplifting, near-immediate mood boost that defines the classic Amnesia experience. Users frequently describe a sense of mental brightness that arrives within minutes and stays steady for the first hour.
- Enhanced creativity and focus. The high suits writing, painting, music and problem-solving sessions during daytime hours. Many growers cite Amnesia Fast as their go-to wake-and-bake cultivar specifically because it sharpens rather than dulls attention.
- Mild physical relaxation. A gentle body softness accompanies the head high without dragging the user into couch-lock. This balance lets the strain double as a sociable daytime smoke and a low-dose evening relaxer.
- Increased sociability. Conversation flows more easily and laughter comes faster, which is why Amnesia Fast remains popular for small gatherings. The talkative edge fades into calm reflection during the third hour as the peak settles.
- Appetite stimulation. Typical munchies build during the second hour rather than immediately, making the strain useful for medical users who struggle with delayed appetite. Light, savory snacks tend to pair better than heavy meals.
- Long-lasting duration. A full 2–3 hour effect window gives generous coverage from a moderate dose. Recreational users report that a single joint can carry an entire evening, which improves the practical value of every gram harvested.
Yield Potential and Harvest Expectations
Indoor yields routinely land between 500 and 600 grams per square meter when light, feeding and training are correct. Outdoor plants in fertile soil with full sun deliver 600–700 grams each, with greenhouse runs occasionally pushing past 800 grams under climate control. The actual number depends on method choice, light intensity, pot volume and the grower's skill in managing the sativa stretch during the first three weeks of bloom.
Harvest timing is read from the trichomes rather than the calendar. The recommended window opens when 70–80% of trichomes have turned milky and roughly 10–20% have shifted to amber. Yellowing fan leaves and shriveled pistils confirm the timing visually. Pulling early tilts the effect toward a clearer head high, while waiting an extra week produces a heavier, more relaxing experience as additional THC degrades into CBN.
Harvest technique influences both quality and labor. Many growers cut whole plants and hang them upside down in a dark, ventilated room, while others prefer branch-by-branch wet trimming for tighter humidity control. A 48-hour dark period before harvest is a popular optional step said to push trichome production slightly higher, and lights-off chopping in the early morning helps preserve volatile terpenes from heat loss.
Drying should run 10–14 days at 18–20°C with humidity between 55% and 60%. Once stems snap rather than bend, buds move into glass jars for curing, with daily burping during the first week and weekly burping thereafter. A three to four week cure brings the moisture content into the 60–62% RH range and gives the Amnesia terpene profile time to round out, softening the peppery edge and emphasizing the lemon-incense top notes.
Maximizing Yield with Training Techniques
Topping at the fourth or fifth node breaks apical dominance and creates two equal main stems, which can be topped again to build four main colas. FIM, a more aggressive variant, often yields three or four new growth tips from a single cut but adds a few days of recovery. Low-stress training combined with main-lining schemes redistributes growth evenly across the canopy and is particularly effective on Amnesia Fast's naturally branchy structure.
A ScrOG screen mounted 15–20 cm above the substrate gives the best yield per watt by holding every bud site at the same height under the lamp. Defoliation around day 21 of flowering opens airflow and exposes lower bud sites, while lollipopping the bottom third of the plant removes weak growth that would otherwise produce larf. The combination keeps the dense upper colas healthy and dries faster after harvest.
| Growing Method | Average Yield | Recommended For |
|---|
| SOG indoor | 550–650 g/m² | Commercial growers |
| ScrOG indoor | 500–600 g/m² | Quality-focused growers |
| Soil pot outdoor | 500–700 g/plant | Hobby growers |
| Greenhouse | 600–800 g/plant | Climate-controlled setups |
| Hydroponics indoor | 600–700 g/m² | Experienced growers |
| Guerrilla grow | 300–500 g/plant | Outdoor stealth setups |
Buying Amnesia Fast Seeds: Forms, Packs and Storage
Amnesia Fast Seeds are most commonly sold as fast-flowering feminized photoperiod seeds, occasionally as regular fast-flowering, and almost never as a true autoflower. Marketing labels vary between seed banks: some print 'Amnesia Fast', others 'Amnesia Fast Version' or 'Amnesia Quick'. Pack sizes typically run at 1, 3, 5 and 10 seeds, with the per-seed price dropping meaningfully on the 5 and 10 packs versus the single-seed option.
When choosing a seed bank, prioritize verifiable reputation, customer reviews, a published germination guarantee and clear shipping policy to your country. Discreet packaging is standard with reputable vendors and should be confirmed before payment. Accepted payment methods usually include credit card, bank transfer and cryptocurrency, with crypto often unlocking a small discount. A clear return or replacement policy for non-germinating seeds is non-negotiable for serious buyers.
Long-term storage protects germination rates. Seeds keep best in an airtight container with a small silica gel sachet, stored at 6–8°C in a refrigerator away from light and moisture fluctuation. Under these conditions Amnesia Fast Seeds remain viable for two to five years with only a gradual drop in germination percentage. Marking the purchase date on the container helps rotate stock so older packs are planted first.
For germination, the paper towel method gives reliable results in two to four days. Place seeds between two moist paper layers, keep them in the dark at 22–25°C, and check daily for taproots without disturbing the medium. Direct sowing into peat pellets or a small starter pot also works and avoids the transplant step. If a seed has not cracked after seven days, contact the seed bank to invoke the germination guarantee rather than continuing to wait.
- Verify the seed bank reputation. Check independent review platforms and grower forums for at least two years of consistent positive feedback. Confirm that the seed bank lists a genuine breeder source rather than reselling unlabeled bulk seeds of unknown origin.
- Confirm the pack type. Read the product description carefully to ensure you are buying fast-flowering feminized seeds rather than autoflower seeds marketed under a similar name. The two products grow on entirely different schedules and respond to different light regimes.
- Check local legal status. Cannabis seed legality varies widely between countries and even between regions of the same country. Confirm both possession rules and import rules before placing an order to avoid customs problems on arrival.
- Review the germination guarantee. Look for a clearly published policy that explains how many seeds are covered, what evidence is required and how replacements are shipped. A vendor that hides this information is a red flag worth taking seriously.
- Choose pack size sensibly. Match the number of seeds to your grow space, legal plant limits and budget rather than buying the largest pack on instinct. Smaller packs make more sense for first-time buyers testing the strain.
- Ensure stealth packaging. Confirm the seed bank ships in plain, unmarked, odor-neutral packaging that passes casual inspection. This protects both the buyer and the parcel during international transit.
Comparison: Amnesia Fast vs Other Amnesia Variants
Against the original Amnesia Haze, Amnesia Fast trades roughly four weeks of flowering time for a one to two percentage point dip in THC. Plant height is similar though slightly more compact, the cerebral effect is nearly identical, and the citrus-pepper terpene profile carries over almost untouched. For most growers this is an obvious win: the harvest arrives weeks earlier with very little compromise on the final smoke.
Compared to Amnesia Auto, the differences are structural. Amnesia Fast requires a 12/12 light switch to flower and produces noticeably larger yields per plant, while the auto version finishes the entire seed-to-harvest cycle faster but stays small and lighter on weight. Growers running perpetual harvests with mixed light schedules prefer the auto, while those who want a single big room of synchronized photoperiod plants pick the fast.
Amnesia XXL targets the opposite end of the trade-off. It pushes yield numbers higher than either Fast or the original Haze but locks the gardener into the longer Haze-style flowering window. Where XXL suits commercial operators with patience and unlimited cycle length, Fast wins for growers who prioritize cycle turnover and want to fit more harvests into a single calendar year.
Selecting between the variants comes down to climate, space and priorities. Northern outdoor gardeners and indoor growers chasing predictable rotation pick Amnesia Fast. Southern outdoor growers with long warm autumns can run the original Haze or XXL for maximum weight. Beginners who want the easiest entry to the Amnesia family usually start with Amnesia Auto, then move to Fast once they understand photoperiod control.
- Short outdoor season. Northern European, Canadian or high-latitude gardens benefit directly from the seven-weekbloom window. The earlier harvest sidesteps autumn rain, mold pressure and early frosts that would destroy slower Haze varieties.
- Multiple indoor cycles per year. The shortened flowering time allows five to six full rotations per twelve months instead of four. For small commercial rooms this adds up to a meaningful annual yield increase without buying extra equipment.
- Limited vertical space. Tents and low rooms cannot accommodate the full stretch of original Amnesia Haze. Amnesia Fast finishes shorter while still rewarding photoperiod-style training methods that autos cannot handle.
- Classic Amnesia effect without the wait. Smokers who love the original Haze high but resent the eleven-week bloom get nearly identical results in seven weeks. The terpene fingerprint and cerebral lift remain instantly recognizable to anyone familiar with the parent.
- Predictable commercial rotation. Scheduled harvests every seven weeks make staffing, drying space and curing capacity easier to plan. Buyers and dispensaries also appreciate the consistent delivery cadence this strain enables.
Related Cannabis Seeds Products
Amnesia Fast is a strong centerpiece for any catalogue, but pairing it with complementary genetics gives growers a broader flavor and effect library across a single season. The strains below share the same emphasis on stable feminized seeds and clean phenotype expression while covering profiles that Amnesia Fast deliberately does not — dessert sweetness, berry relaxation, tropical fruit and forest pine. Rotating two or three of them through the same room produces a varied personal stash without changing equipment.
Pirate Cake Seeds bring a dessert-leaning, sweet cookie-cake profile for growers who want a sugary counterpoint to Amnesia citrus. Blackberry Punch Seeds add a fruity berry-punch aroma layered over an indica-dominant relaxing high, ideal as an evening companion to a daytime Amnesia smoke. Papaya Melons Seeds deliver a tropical fruit lineup centered on papaya and melon terpenes, while In The Pines Seeds carry a distinctive pine and forest terpene set for gardeners chasing classic outdoor-style aromas.
A practical approach is to pick two or three strains from this group and run them together to balance harvest variety. Pairing a sativa-dominant Amnesia Fast with one indica-leaning option such as Blackberry Punch covers both daytime and evening use, and adding a third strain with a distinct terpene profile builds a true personal seed bundle. Each linked page below explains the genetics, grow specs and effects in the same detail as this one.
The catalogue also organizes seeds by category — feminized, autoflowering, fast-flowering and regular — so you can browse beyond this small group when planning longer-term gardens. Growing guides and effect-based collections sit alongside the strain pages to help match genetics to your space, climate and intended use. Explore the full assortment to round out a seed library that fits your specific setup.
