Original Amnesia
Cannabis seeds
by Silent Seeds
Original Amnesia Cannabis Seeds by Silent Seeds
Original Amnesia is a sativa-dominant feminized cannabis seed from Silent Seeds that crosses Haze with Northern Lights to produce the unmistakable Amnesia effect — clear-headed, uplifting, and immediate — without the marathon flowering times of pure haze genetics. This award-winning strain has earned its reputation as the queen of Amsterdam coffeeshops, and growing her yourself is more straightforward than you might expect.
Why Original Amnesia Feminized Seeds Stand Out
Walk into any coffeeshop in Amsterdam and there's a solid chance Amnesia is on the menu. It's been that way for years, and for good reason. The Haze x Northern Lights cross gives you that sharp, cerebral sativa head — the kind that makes you want to reorganise your entire flat or have a three-hour conversation about architecture — but the Northern Lights genetics keep the flowering time sensible. You're looking at roughly 65 days indoors instead of the 12-14 weeks some pure hazes demand.
Silent Seeds took this coffeeshop staple and turned it into a feminized seed that's genuinely easy to grow. No hunting for females, no babysitting a finicky pheno. She's vigorous, she's resilient against mould and pests, and she produces dense, resinous buds coated in a thick layer of trichomes. The aroma during flowering is sharp citrus layered over an incense-like base — your carbon filter will be earning its keep.
The one honest limitation: she grows tall. At full stretch, Original Amnesia can reach 3.5 metres outdoors. Indoors, you'll want to top early or use SCRoG to keep the canopy manageable. If you're working with a small tent — say a 60x60 — this probably isn't your best match. An 80x80 or larger gives her the room she wants.
Original Amnesia Genetics and Growing Specifications
Original Amnesia feminized seeds carry a 70/30 sativa-to-indica ratio, blending the cerebral intensity of Haze with the structural stability and faster finish of Northern Lights. Here's what you're working with:
| Specification | Detail |
|---|---|
| Seed bank | Silent Seeds |
| Genetics | Haze x Northern Lights |
| Type | Feminized (photoperiod) |
| Sativa / Indica | 70% / 30% |
| THC content | Up to 18% |
| Indoor flowering time | Approximately 65 days |
| Indoor yield | Up to 600g/m2 |
| Outdoor yield | Up to 1200g per plant |
| Outdoor harvest | Mid to late October |
| Plant height | Up to 3.5m outdoors |
| Mould/pest resistance | High |
| Seeds per pack | 3 |
Yield and Structural Development of Original Amnesia
This is where Original Amnesia really earns her keep. Indoor growers pulling 600g/m2 under optimised lighting is no exaggeration — she's a proper producer. The buds grow in elongated, dense clusters along tall colas, each one sticky with resin and covered in visible trichomes. Under a loupe, the crystal coverage is genuinely impressive for a sativa-dominant plant.
Outdoors, the numbers get almost absurd. Under expert hands with a long growing season and plenty of direct sun, 1200g per plant is achievable. That's the kind of harvest that fills your curing jars for the year. She'll be ready for the chop around mid to late October in the Northern Hemisphere — push it too late and you risk autumn rain, so keep an eye on trichome colour and don't get greedy.
Structurally, expect a tall central cola with generous side branching. The Northern Lights influence gives the stems more rigidity than a pure haze, but at 3.5 metres, you'll still want support stakes or a trellis net for the heaviest colas. Indoor growers: top her at the 4th or 5th node and flip to 12/12 before she gets away from you. A SCRoG setup is the best way to maximise that 600g/m2 potential while keeping height under control.
Aromas, Flavours, and the Original Amnesia Effect
The smell hits you during mid-flower — a sharp, almost acrid citrus cutting through a deeper incense and spice base. It's that classic Amnesia nose that anyone who's spent time in Amsterdam coffeeshops will recognise instantly. When you break a cured bud open, the lemon sharpens and there's a subtle earthy sweetness underneath. On the inhale, it's tangy and resinous; on the exhale, that haze spice lingers.
According to research published in PMC, Amnesia Haze-type cultivars (genetically comprised of approximately 80% sativa and 20% indica genetics) produce a distinct terpene and cannabinoid profile that contributes to their characteristic aroma and effect (PMC 11127828).
The effect is immediate and cerebral. The sativa dominance delivers a clear-headed, energising onset that builds quickly. It's a daytime strain through and through — the kind of smoke that pairs with creative projects, long walks, or deep conversations. At up to 18% THC, it's potent without being overwhelming for experienced users, though newcomers should approach with respect. According to research on cannabis and memory, preclinical evidence shows that THC can interfere with memory retrieval tasks (PMC 9855787), so don't plan on studying for an exam immediately after.
Worth noting: according to a review of individual responses to cannabinoids, some users may experience anxiety or panic at higher doses, particularly via inhalation (PMC 10058560). If you're sensitive to sativas, start low and give it time before reaching for more.
How to Grow Original Amnesia Feminized Seeds
Original Amnesia is forgiving enough for growers with a couple of runs under their belt, while still rewarding experienced cultivators who dial in their environment. Here's how we'd approach it:
- Germinate your seeds using the paper towel method or directly in a starter plug. Keep the environment warm (22-26°C) and moist. Taproots typically emerge within 24-72 hours.
- Transplant seedlings into their final containers once the first true leaves appear. For indoor grows, 11-15 litre pots work well. Outdoors, go bigger — 30 litres or directly into the ground if your soil is decent.
- During vegetative growth, top the plant at the 4th or 5th node to encourage lateral branching. This is critical for indoor growers — without training, she'll outgrow most tents. A SCRoG net installed at canopy height helps distribute light evenly across all bud sites.
- Flip to 12/12 lighting when the canopy fills roughly 60-70% of your net. She'll stretch considerably in the first two weeks of flower — factor in a near-doubling of height during this phase.
- During flowering, support heavy colas with stakes or yo-yo hangers. Feed a bloom-specific nutrient schedule and watch for calcium and magnesium demand, especially under LED lighting.
- Harvest around day 65 indoors when trichomes show a mix of milky white with the first hints of amber. Outdoor growers: aim for mid to late October, weather permitting. Dry in a dark room at 18-20°C and 55-60% humidity for 10-14 days, then cure in glass jars for at least two weeks.
Original Amnesia Compared to Other Sativa Seeds
If you're weighing up your sativa options, here's how Original Amnesia stacks up against two other popular choices:
| Feature | Original Amnesia (Silent Seeds) | Amnesia Haze (typical) | Northern Lights (indica reference) |
|---|---|---|---|
| Sativa/Indica | 70/30 | 80/20 | 0/100 |
| THC | Up to 18% | Up to 21% | Up to 18% |
| Flowering time | ~65 days | ~77 days | ~50 days |
| Indoor yield | Up to 600g/m2 | Up to 500g/m2 | Up to 500g/m2 |
| Grow difficulty | Moderate | Moderate-hard | Easy |
| Effect character | Cerebral, energising | Cerebral, intense | Physical, sedating |
The big advantage Original Amnesia holds over a standard Amnesia Haze is that 65-day flowering window versus 77+ days. You get the classic Amnesia character — the citrus nose, the cerebral onset, the coffeeshop pedigree — without the extra two weeks of patience (and electricity). The 30% indica genetics from Northern Lights also give her sturdier stems and better mould resistance, which matters if your grow space isn't perfectly climate-controlled.
Growing Original Amnesia indoors? Pair these seeds with a complete grow tent kit to control height and maximise that 600g/m2 potential. A carbon filter is non-negotiable with this strain — the citrus-incense aroma is gorgeous but not subtle. If you're looking for a complementary strain to run alongside, consider an indica-dominant variety for evening use to balance out your harvest.
Safety and Interactions
This content is written for adults aged 18 and over. Cannabis affects everyone differently, and responsible use starts with understanding what you're working with.
At up to 18% THC, Original Amnesia is potent. According to research on cannabis and pain, THC has broad interactions with drug-metabolising enzymes and can enhance adverse effects of other medications (PMC 9373074). If you're taking prescription medication — particularly CNS depressants, blood thinners, or psychiatric medications — speak with your doctor before using cannabis.
Reported side effects of THC-dominant cannabis include dry mouth, dry eyes, light-headedness, and in some cases, anxiety or paranoia at higher doses. According to a cohort study on medical cannabis, adverse events ranged from mild (most common) to severe (rare), with the most frequently reported being gastrointestinal and neurological symptoms (PMC 10932782).
Frequently Asked Questions
What effects does Original Amnesia produce?
Original Amnesia delivers a fast-onset cerebral effect that's energising and clear-headed, typical of sativa-dominant strains. The 70/30 sativa-indica ratio means the body effect is minimal — this is a daytime strain. At up to 18% THC, it's potent enough to be felt immediately but functional enough for creative tasks.
How long does Original Amnesia take to flower indoors?
Approximately 65 days from the flip to 12/12 lighting. That's notably faster than many Haze-dominant strains, which can run 77 days or longer. The Northern Lights genetics in the cross are what keep the schedule reasonable.
How tall does Original Amnesia grow?
Outdoors, up to 3.5 metres. Indoors, she'll stretch significantly during the first two weeks of flower. Use topping and SCRoG techniques to manage height — flip to 12/12 before the canopy fills your space completely.
What does Original Amnesia smell like during flowering?
Sharp citrus and incense, with an earthy sweetness underneath. The aroma intensifies from mid-flower onwards and is strong enough to require a carbon filter for indoor grows. It's the classic Amnesia nose — recognisable to anyone who's visited an Amsterdam coffeeshop.
Is Original Amnesia suitable for beginner growers?
She's manageable for growers with at least one successful run behind them. The mould and pest resistance is high, and she's generally vigorous and forgiving. The main challenge is height management indoors — without training, she'll outgrow most tents. If you can top and SCRoG, you'll be fine.
What yield can I expect from Original Amnesia?
Up to 600g/m2 indoors under optimised conditions (good lighting, proper training, adequate nutrition). Outdoors, experienced growers have pulled up to 1200g per plant with a full growing season and direct sun. Even moderate grows produce generous harvests — she's a heavy yielder by nature.
How many seeds come in a pack of Original Amnesia?
Each pack contains 3 feminized seeds. All seeds are photoperiod, meaning they require a light cycle change (12/12) to trigger flowering.
Last updated: April 2026
Related products
You might also like
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.