How to grow Amsterdam Amnesia
- Breeder: Dutch Passion
- Genetics: sativa
- THC: 20 to 25%
- Type: Autoflower
- Difficulty: moderate
- Seed to harvest: about 9 to 11 weeks
- Flavors: berry, earthy, pine, spicy
What is specific about Amsterdam Amnesia
- Autoflower, avoid transplanting and heavy training; it can't recover lost veg time, so stress sets it back.
- Sativa-leaning, expect a big stretch when flowering starts; top early or run a net (ScrOG).
Indoor calendar for Amsterdam Amnesia
| Stage | When | Note |
|---|---|---|
| Germination | week 1 | Seed in its final pot; autoflowers dislike transplanting. |
| Seedling and growth | weeks 2 to 4 | Light on 18 hours a day for the whole grow; no switch to 12/12 needed. |
| Flowering | from about week 4 to week 11 | Flowering starts by age, not by light. |
| Harvest | week 9 to 11 | Judge by trichomes, not the calendar. |
| Dry and cure | weeks 10 to 15 | One to two weeks drying, then at least two weeks curing in jars. |
About 12 to 15 weeks from seed to cured buds.
Week by week
Germination: Days 1–7
Pop the seed.
- Soak in a moist paper towel or plant 1cm deep in light, airy soil.
- Keep warm (22–25°C), humid and dark until the sprout appears.
- Moist, never soggy.
Seedling: Weeks 2–3
First true leaves.
- Gentle light on 18/6, high humidity (~65%).
- Tiny waterings near the stem; let the top dry between.
- Quarter-strength nutrients at most.
Vegetative: Weeks 4–6 (auto)
Build the plant.
- Autoflowers veg briefly then flower on their own, start in the final pot, don't transplant late.
- Feed grow (high-N) nutrients; train (LST/topping) for an even canopy.
- Sativa-leaning: leggier, give vertical room.
Flowering: ~5–7 weeks of bloom
Buds bulk up.
- Stays on 18/6 to harvest.
- Switch to bloom (high-P/K) nutrients; lower humidity (~45%) to prevent bud rot.
- Watch trichomes: mostly cloudy with some amber = peak ripeness.
Flush & harvest: Final 1–2 weeks
Finish clean.
- Plain water (no nutrients) the last 1–2 weeks for a smoother smoke.
- Harvest, wet-trim, dry slowly (~60°F / 60% RH, 7–14 days).
- Cure in jars 2+ weeks, burping daily at first.
~9–11 weeks seed to harvest.
Growing Amsterdam Amnesia outdoors
Sown outdoors in mid May, after the last frost, Amsterdam Amnesia should be ready in mid to late July. That leaves time for a second run: a seed sown by early July finishes around early to mid September.
Drying and curing
Its berry and pine notes come from the most volatile terpenes, the first to go in a warm, fast dry. Dry slowly around 18 °C and 60% humidity for 10 to 14 days and cure in jars to keep them.
How Amsterdam Amnesia compares
At 9 to 11 weeks it finishes faster than 68% of the 72 autoflowers in our guides (typical: 10.5 weeks).
Its THC, up to 25%, is above the typical 20% for these autoflowers.
Bred by Dutch Passion, one of 120 Dutch Passion strains with a grow guide here.
| Similar strain | Seed to harvest | THC | Breeder |
|---|---|---|---|
| Auto Xtreme Haze | 11 to 12 weeks | 20% | Dutch Passion |
| Auto Desfrán | 12 to 14 weeks | 20% | Dutch Passion |
| Auto Think Big | 13 weeks | 20% | Dutch Passion |
| Auto Think Different | 10 to 11 weeks | 20% | Dutch Passion |
Effects
creative, euphoric, focus, uplifting
Grower verdict: 3 reviews, average 5/5.
Questions
Is Amsterdam Amnesia easy to grow?
Amsterdam Amnesia is considered moderate to grow and flowers automatically without a light schedule change. This read draws on 3 grower reviews.
When is Amsterdam Amnesia ready outdoors?
Sown outdoors in mid May, after the last frost, Amsterdam Amnesia should be ready in mid to late July. That leaves time for a second run: a seed sown by early July finishes around early to mid September.
How strong is Amsterdam Amnesia?
The breeder lists 20 to 25% THC. Real results depend on light, feeding and harvest timing.
Does Amsterdam Amnesia need a light change to flower?
No. Amsterdam Amnesia is an autoflower: it flowers by age and goes from seed to harvest in about 9 to 11 weeks on 18 hours of light a day.
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