Auto Amnesia XXL
Cannabis seeds
by Advanced Seeds
Auto Amnesia XXL Cannabis Seeds
Auto Amnesia XXL is an autoflowering cannabis seed from Advanced Seeds that delivers the classic Amnesia profile — citrusy, spicy, and cerebrally uplifting — without the fuss of photoperiod lighting schedules. Producing up to 600g/m² indoors from a plant that barely reaches 1 metre, this is a serious yield from a seriously manageable grow. If you want Amnesia genetics without the learning curve, start here.
Why Auto Amnesia XXL Seeds Stand Out
The original Amnesia is one of those strains that's earned its reputation over decades — that unmistakable citrus-spice nose, the long-lasting cerebral lift, the kind of smoke that makes you forget what you walked into the kitchen for. Auto Amnesia XXL keeps all of that intact while grafting on ruderalis genetics, which means the plant flowers on its own internal clock rather than waiting for light cycle changes. For anyone growing on a balcony, in a small tent, or just wanting to keep things simple, that's a genuine advantage.
Advanced Seeds have been breeding in Spain since 2007, and their autoflowering lines are built for the Mediterranean climate as much as for indoor setups. Auto Amnesia XXL is one of their flagship autos, and the "XXL" in the name isn't just marketing — 550 to 600g/m² from a plant under a metre tall is a properly impressive return. We've seen photoperiod strains twice that height produce less.
Auto Amnesia XXL Seed Specifications
| Spec | Value |
|---|---|
| Seed Bank | Advanced Seeds |
| Seed Type | Autoflowering, Feminised |
| Genetics | Amnesia x Ruderalis |
| THC Content | 14% |
| Indoor Yield | 550–600g/m² |
| Plant Height | Approximately 1 metre |
| Seed to Harvest | 70–80 days |
| Growing Difficulty | Easy |
| Suitable Environment | Indoor and outdoor |
| Seeds per Pack | 3 |
| SKU | CSAD0055 |
Growing Auto Amnesia XXL Seeds
One of the best things about Auto Amnesia XXL is how little she asks from you. No light schedule changes, no worrying about light leaks triggering hermaphroditism, no separate veg and flower rooms. You germinate, you plant, you water, and roughly 70 to 80 days later you're trimming buds. That's genuinely it for a basic grow.
The ruderalis backbone makes this strain forgiving of minor mistakes — a slightly off pH reading or an inconsistent watering schedule won't destroy your harvest the way it might with a finicky photoperiod Haze. That said, she does respond well to a bit of attention. Low-stress training (LST) — gently bending and tying down branches to expose more bud sites to light — can push your yield toward the upper end of that 550–600g/m² range. SOG (Sea of Green) and ScrOG (Screen of Green) setups also work well with Auto Amnesia XXL, particularly indoors where you're maximising every square centimetre of canopy.
One honest note: at 14% THC, this isn't the heaviest hitter in the Amnesia family. If you're chasing 20%+ THC numbers, you'll want to look at a photoperiod Amnesia Haze instead. But 14% delivers a clean, functional cerebral effect that lasts for hours without knocking you sideways — and for a lot of growers, that's exactly the point.
- Germinate seeds using the paper towel method or directly in a starter plug. Keep temperatures between 20–25°C and maintain moisture without waterlogging.
- Transplant seedlings into their final container once the taproot emerges — autos don't like being repotted mid-grow, so go straight to an 11–15 litre pot with well-draining soil or coco coir.
- Provide 18–20 hours of light per day throughout the entire grow cycle. Auto Amnesia XXL doesn't need a 12/12 flip — she'll flower on her own around week 3–4.
- Begin light feeding with a balanced vegetative nutrient once the plant has 3–4 sets of true leaves. Switch to a bloom nutrient when you see the first pistils forming.
- If training, start LST early — around week 2–3, while stems are still flexible. Avoid high-stress techniques like topping, which can stunt autoflowering plants.
- Monitor trichomes from day 60 onwards. Harvest when trichomes shift from clear to milky white for a more cerebral effect, or wait for some amber trichomes if you prefer a heavier body feel.
- Dry trimmed buds in a dark room at 18–21°C and 55–65% humidity for 7–10 days, then cure in glass jars for at least 2 weeks. The citrus and spice terpenes really come alive after a proper cure.
Aroma, Flavour, and Effect of Auto Amnesia XXL
Crack open a cured jar of Auto Amnesia XXL and the first thing that hits you is citrus — sharp, zesty, almost like lemon peel left in the sun. Underneath that sits a spicy, slightly earthy warmth that intensifies once you grind the buds. Through a vaporiser at around 185–190°C, the citrus notes come through even more cleanly, with a peppery kick on the exhale.
The effect is cerebral and uplifting. At 14% THC, it's the kind of smoke you can actually function on — conversations flow, creative tasks feel more engaging, and there's a gentle mood lift that carries through for a good couple of hours. It won't glue you to the sofa, and it won't send your thoughts racing into paranoid territory. For daytime use or social settings, Auto Amnesia XXL sits in a sweet spot that stronger Amnesia cuts sometimes overshoot.
If you've had the original Amnesia Haze and wondered whether an autoflowering version could capture that same character — it does. The potency is dialled back, but the flavour profile and the quality of the effect are recognisably Amnesia.
Complete your setup: if you're growing Auto Amnesia XXL indoors, a quality grow tent and LED light make all the difference. Pair these seeds with a carbon filter kit to keep the citrus-spice terps from announcing your grow to the whole building. For a smoother finish, consider a Boveda humidity pack for the curing stage.
Auto Amnesia XXL vs Photoperiod Amnesia
| Feature | Auto Amnesia XXL | Photoperiod Amnesia Haze (typical) |
|---|---|---|
| Seed to Harvest | 70–80 days | 120–150+ days (including veg) |
| Light Schedule | 18-20h constant — no flip needed | 18/6 veg, then 12/12 to trigger flower |
| THC | 14% | 18–22% |
| Indoor Yield | 550–600g/m² | 500–700g/m² |
| Plant Height | ~1 metre | 1.5–2+ metres |
| Growing Difficulty | Easy | Moderate to advanced |
| Best For | Quick harvests, small spaces, new growers | Maximum potency, experienced setups |
Frequently Asked Questions
How long does Auto Amnesia XXL take from seed to harvest?
Around 70 to 80 days from germination. That's the full cycle — no separate veg and flower phases. You'll typically see the first pistils by week 3–4, with buds fattening up through weeks 6–10.
Can I top Auto Amnesia XXL?
We'd avoid it. Topping stresses the plant, and autoflowers have a fixed life cycle — they can't recover the lost growth time the way photoperiod plants can. Stick to low-stress training (LST) instead. Bend and tie branches down early, and you'll get a similar canopy spread without the risk.
Is 14% THC too low for experienced users?
Depends what you're after. 14% gives a clean, functional cerebral effect — great for daytime use and staying productive. If you want something that hits harder, a photoperiod Amnesia Haze at 20%+ will deliver more intensity. But don't write off 14% — the quality of the effect matters more than the number.
What yield can I expect from Auto Amnesia XXL outdoors?
Advanced Seeds rate the indoor yield at 550–600g/m². Outdoor results vary more depending on climate, sunlight hours, and soil quality, but in a warm Mediterranean-style summer you can expect solid returns. She stays compact at around 1 metre, so she's discreet on a balcony or terrace.
Does Auto Amnesia XXL need a specific light schedule?
No — that's the whole point of autoflowering genetics. She flowers based on age, not light changes. Most growers run 18–20 hours of light per day from seed to harvest. Some run 24 hours, though we'd give her at least 4 hours of darkness for healthier growth.
What does Auto Amnesia XXL smell like?
Sharp citrus up front — think lemon zest — with a spicy, slightly peppery undertone. The aroma gets stronger during the last 2–3 weeks of flowering and really opens up after curing. If you're growing indoors, a carbon filter is worth having from week 5 onwards.
Is Auto Amnesia XXL good for beginners?
It's one of the better choices for a first grow. The autoflowering genetics remove the need to manage light schedules, and the plant stays compact enough for a small tent or cupboard. She's forgiving of minor feeding or watering mistakes. Just don't overwater — that's the number one beginner error we see.
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.