Amnesiac
Cannabis seeds
by Spliff Seeds
Amnesiac Cannabis Seeds by Spliff Seeds
Amnesiac is a sativa-dominant cannabis seed strain from Spliff Seeds that crosses Amnesia with Super Silver Haze to deliver big yields, bold citrus flavours, and a stimulating mind-body effect. With indoor harvests of around 500g/m² and outdoor hauls of 400g/plant, she rewards growers who give her the space she wants — and she wants quite a bit of it.
We've carried Spliff Seeds for years. They're a no-nonsense Dutch seed bank that breeds for reliability over hype, and Amnesiac is a solid example of that approach. She stretches, she produces, and she fills a room with that unmistakable Haze aroma that tells you something good is on the way.
Pack Size
Amnesiac seeds come in packs of 5 feminised seeds (SKU: CSSF0041). Feminised means every seed produces a flowering female plant — no males to cull, no wasted space in your tent.
Amnesiac Strain Genetics and Lineage
Amnesiac cannabis seeds carry genetics from two heavyweight sativa lines: Amnesia and Super Silver Haze. If you know either parent, you already know what to expect — long internodal spacing, vigorous vegetative growth, and that classic Haze terpene profile that leans citrus and incense rather than skunk and diesel.
Amnesia brings the raw potency and cerebral intensity. Super Silver Haze — itself a cross of Skunk, Northern Lights, and Haze — adds structure and resin production. The result is a plant that grows like a sativa but finishes with tighter, more compact buds than you'd typically get from a pure Haze line. That's the Super Silver Haze influence doing its job.
| Specification | Detail |
|---|---|
| Seed bank | Spliff Seeds |
| Genetics | Amnesia x Super Silver Haze |
| Type | Feminised photoperiod |
| Dominance | Sativa-dominant |
| Flowering time | 9-11 weeks |
| Indoor height | Approximately 160cm |
| Outdoor height | 200-300cm |
| Indoor yield | ~500g/m² |
| Outdoor yield | ~400g/plant |
| Seeds per pack | 5 feminised seeds |
Growing Amnesiac Seeds: What to Expect
Amnesiac cannabis seeds produce robust, reliable plants that handle a range of growing environments — but she's not a compact indica you can tuck into a corner and forget about. Indoors, expect her to reach around 160cm. Outdoors, she'll push between 2 and 3 metres if left untrained. That's the sativa genetics talking.
Here's the honest limitation: if you're working with a short grow tent (120cm or under), Amnesiac will test your patience. She stretches hard in early flower, sometimes doubling her vegetative height. The good news is she responds brilliantly to training. Topping her once or twice during veg keeps the canopy even and the height manageable. LST (low-stress training) and ScrOG both work well too — she's flexible enough to bend without snapping, which isn't always the case with sativa-leaning strains.
After 9-11 weeks of flowering, you're looking at indoor harvests of roughly 500g/m². Outdoors, with a full season of sun, she'll give you around 400g per plant. Those numbers are solid for a sativa-dominant strain — many pure Haze lines take 12-14 weeks to finish and yield less.
Growing Tips
- Start topping early — once the plant has 4-5 nodes, take the top off. This encourages lateral branching and keeps height in check. A second top 2 weeks later creates a nice, even canopy.
- Give her room. In a tent, allow at least 60x60cm per plant. She fills out horizontally when trained, and crowding leads to poor airflow and mould risk on those dense buds.
- Watch humidity in late flower. Amnesiac produces tight, compact buds that can trap moisture. Keep relative humidity below 50% during the last 3 weeks of flowering.
- Support the branches. By week 7-8 of flower, the buds get heavy enough to bend branches. Bamboo stakes or a trellis net save heartbreak.
- Flush for 1-2 weeks before harvest if growing in mineral nutrients. The Haze terpenes come through much cleaner with a proper flush.
Amnesiac Flavour, Aroma, and Terpene Profile
Amnesiac buds hit you with strong Haze-like aromas the moment you open the jar — that sharp, almost electric citrus scent layered over earthy, woody undertones. There's a touch of incense in there too, which is classic for strains carrying Super Silver Haze genetics. It's the kind of smell that fills a room and lingers on your fingers.
The flavour follows the nose closely. On the inhale, you get bright citrus — lemon and grapefruit notes that sit on the tongue. The exhale brings the earth and that faint incense quality, almost like sandalwood. If you've smoked a good Amnesia Haze before, you'll recognise the family resemblance immediately, but Amnesiac adds a bit more depth on the back end thanks to the Super Silver Haze influence.
For the best flavour expression, we'd suggest using a clean glass pipe or a dry herb vaporiser set between 180-195°C. Rolling papers work fine, but you lose some of those lighter citrus terpenes to combustion. A vaporiser at lower temperatures really lets the lemon and incense notes shine.
Amnesiac Effects: Stimulating Mind-Body Experience
Amnesiac delivers a stimulating effect that caters to both the mind and body. Expect an uplifting cerebral onset — clear-headed and energising — that gradually settles into a soothing physical relaxation. It's not a couch-lock strain by any stretch; the sativa dominance keeps things moving. But the body component is noticeable enough to take the edge off tension without dragging you down.
This is a strain that's best enjoyed when you've got something to do — creative work, a long walk, music, conversation. The mental stimulation pairs well with activity. Save the heavy indica strains for the evening; Amnesiac is more of a daytime companion.
According to research published in PMC, THC provides anti-inflammatory and pain-relieving effects for neuropathy and chronic pain (PMC10058560). While individual responses to cannabis vary, Amnesiac's sativa-dominant profile and reported potency place it among strains that users commonly seek for daytime functional use. It's also worth noting that according to a scoping review on cannabis and pain (PMC9373074), cannabis-based preparations may produce mild adverse effects including somnolence and sedation — so start low if you're unfamiliar with Haze-type strains.
Amnesiac vs Other Amnesia Strains
The Amnesia family tree is sprawling, and it's easy to get lost in the naming. Here's how Amnesiac from Spliff Seeds stacks up against two other popular options in the same lineage.
| Feature | Amnesiac (Spliff Seeds) | Amnesia Haze (typical) | Amsterdam Amnesia (Dutch Passion) |
|---|---|---|---|
| Genetics | Amnesia x Super Silver Haze | Amnesia x various Haze | Stabilised Amnesia Haze |
| Flowering time | 9-11 weeks | 10-12 weeks | 9-11 weeks |
| Indoor yield | ~500g/m² | ~450-600g/m² | ~500-600g/m² |
| Indoor height | ~160cm | ~150-180cm | ~150-170cm |
| Key flavour | Citrus, earth, incense | Citrus, spice, pepper | Haze, citrus, incense |
| Seed type | Feminised | Varies by breeder | Feminised |
The main advantage Amnesiac has over a standard Amnesia Haze is the slightly shorter flowering window. Shaving even a week off a sativa flowering cycle makes a real difference when you're managing a grow room schedule. The Super Silver Haze parentage also adds a bit more bud density than a pure Amnesia typically delivers.
Why Amnesiac Cannabis Seeds Belong in Your Grow Room
We get a lot of customers asking for sativa-dominant strains that don't require a PhD in plant training to manage. Amnesiac fits that brief. She stretches, yes — but she responds to basic topping and training without throwing a fit. She flowers in a reasonable timeframe for a sativa. And she yields well enough to justify the tent space she occupies.
The flavour profile is the real selling point, though. If you're a Haze lover, Amnesiac delivers that classic citrus-incense combination that made Amnesia famous in Amsterdam's coffeeshops, but with a bit more body and complexity from the Super Silver Haze side. It's not a one-note strain.
The one thing to watch: she does need vertical space. If your grow area has a hard ceiling at 120cm, look at something shorter — or commit to aggressive training from early veg. With a 160cm tent or taller, you'll be fine.
Complete your Amnesiac grow with a proper setup. A grow tent with at least 160cm of vertical clearance gives her the headroom she needs, and a carbon filter is non-negotiable once those Haze terpenes start filling the air around week 5 of flower. If you're planning to top and train, grab a set of plant ties and some bamboo stakes — they'll save you from snapped branches when those buds pack on weight.
Frequently Asked Questions
How tall does Amnesiac grow indoors?
Around 160cm without training. She'll stretch significantly in early flower, so top her during veg to keep things manageable. In a 200cm tent, you'll have comfortable clearance with one or two toppings.
What is the flowering time for Amnesiac cannabis seeds?
9-11 weeks from the flip to 12/12. Most phenotypes finish closer to 10 weeks. Check trichomes with a jeweller's loupe — you want mostly cloudy with a few amber for the best balance of cerebral and physical effects.
Is Amnesiac suitable for beginner growers?
She's manageable if you're comfortable with basic training techniques like topping. The main challenge is height control. If you can handle that, the rest of the grow is straightforward — she's robust and not particularly fussy about feeding.
What does Amnesiac taste like?
Bright citrus on the inhale — think lemon and grapefruit — with earthy, incense-like notes on the exhale. The Super Silver Haze genetics add depth that a standard Amnesia sometimes lacks. Best tasted through a vaporiser at 180-195°C.
How much does Amnesiac yield per plant?
Indoors, expect around 500g/m² under good conditions. Outdoors, she'll produce roughly 400g per plant with a full season of sunlight. Proper training and adequate lighting push those numbers toward the higher end.
Can I grow Amnesiac outdoors?
Yes, she does well outdoors in warm, sunny climates. She'll reach 2-3 metres in height, so plan for that. Harvest timing depends on your latitude, but she typically finishes by mid to late October in the Northern Hemisphere.
What training methods work best for Amnesiac?
Topping is the standout technique — she responds to it cleanly and branches out well. ScrOG and LST also work. She's flexible enough for bending without breaking, which makes her more forgiving than some sativa-dominant strains.
Last updated: April 2026
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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.