How to Grow Amnesia Haze
Few strains carry a trophy cabinet like this one. Amnesia Haze, often searched simply as Amnesia, won the Cannabis Cup in 2012 and took Spannabis titles in 2011, 2015, and 2018, and decades after its Amsterdam coffeeshop heyday it remains the benchmark sativa for a whole generation of growers. The Blimburn Seeds cut keeps the original genetics: 70% sativa, 18-22% THC, citrus-sweet flavor, and a surprisingly quick 8-10 week flowering time.
This guide walks the full cycle for Amnesia Haze feminized seeds from Blimburn Seeds, using the official datasheet figures: germination, training, the 12/12 flip, the tropical-friendly climate window, and the harvest timing that preserves the famous soaring character.
Recommended Strains
Amnesia Haze
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THC | 18% - 22% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 30% Indica / 70% Sativa |
Super Critical
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THC | 18% - 20% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 70% Indica / 30% Sativa |
Amnesia Haze at a Glance
Start with the official numbers; the outdoor yield row alone explains much of this strain’s enduring popularity.
| Trait | Amnesia Haze |
|---|---|
| Lineage | Original Amnesia Haze |
| Type | Feminized photoperiod |
| Awards | Cannabis Cup 2012; Spannabis 2011, 2015, 2018 |
| Phenotype | 30% Indica / 70% Sativa |
| THC | 18-22% (medium) |
| Flowering time | 8-10 weeks |
| Height | 4.92 ft (1.5 m) |
| Yield indoor | 1.64-1.97 oz/ft² (500-600 g/m²) |
| Yield outdoor | 24.69-28.22 oz (700-800 g) per plant |
| Outdoor harvest | October |
| Climate | Tropical to warm |
| Effects | Creative, focused, munchie-inducing |
| Flavors | Citrus, pungent, sweet |
Read those figures together and the profile is remarkable: a plant that stays at 1.5 m, flowers as fast as many indicas, and still hands outdoor growers 24.69-28.22 oz per plant. Classic haze lines demand twelve-plus weeks and a stepladder; this cut asks for neither.
Promos & Deals
Why Amnesia Haze Keeps Winning Cups
Four podium finishes across two of the industry’s most scrutinized competitions is not luck. Judges keep rewarding the same two qualities growers notice at home: a terpene profile that leaps out of the jar, zesty citrus over a pungent, incense-like base with a sweet finish, and an effect that defined what “sativa” means for a generation: creative, focused, and bright, with a munchie-inducing tail that arrives as the session winds down.
That reputation places it among the most decorated Cannabis Cup winners in the Blimburn Seeds catalog, and it anchors the whole family of haze strains that descend from or chase its standard. For you as a grower, the awards translate into a simple promise: the genetics are proven at the highest level, so environment and patience are the only variables left to manage.
One practical caveat comes with the fame: many shops sell plants under the Amnesia name with wildly varying numbers, which is why the figures in this guide come strictly from the official Blimburn Seeds datasheet.
Germination and the Vegetative Phase
Germinate with the paper-towel method at 70-79°F: seeds between damp paper towels on a covered plate, kept dark, with taproots showing in 24-120 hours. Plant half an inch deep in light, airy soil, taproot down.
These are feminized seeds, so every plant flowers female and your canopy math stays simple. Veg under 18 hours of daily light for 4-6 weeks. Early growth is energetic and open, with the slender leaflets and eager side branching typical of a 70% sativa; it takes to training as well as any plant in the catalog.
Top once above the fourth node and spread the mains with low-stress training. Because this cut stays near 1.5 m, you are not fighting runaway stretch, just encouraging an even table of bud sites. A light interior defoliation at the end of veg keeps the mid-canopy breathing once the long colas begin to stack.
Growing Amnesia Haze Indoors
Indoors, flip to 12/12 when plants reach roughly half their target height and settle in for an 8-10 week bloom, fast enough that electricity-conscious growers can treat it like an indica on the calendar. Expect a moderate stretch in the first three weeks of flower.
Keep lights-on temperatures at 68-82°F; this tropical-rated cultivar shrugs off heat that makes other strains sulk, which also makes it a strong candidate for warm attics and summer tents. Hold humidity at 50-60% in veg and 40-45% in bloom. The buds run long and reasonably open, so mold pressure stays moderate, but the resin load is heavy and a steady oscillating fan protects it.
Worked well, 1.64-1.97 oz/ft² (500-600 g/m²) is a realistic return, arriving as sticky, elongated colas dusted in pale frost with those signature orange pistils.
Growing Amnesia Haze Outdoors
Outdoors is where the datasheet turns spectacular: 24.69-28.22 oz (700-800 g) per plant, harvested in October. The tropical-to-warm climate rating means growers in hot, humid regions, the US South, coastal Spain, and similar latitudes, can run it where fussier strains fail, and long warm autumns let it ripen fully.
Plant in full sun after the last frost in 15+ gallon containers or rich open soil, and stake the main branches by early September; 700-plus grams hangs heavy on 1.5 m of plant. In cooler temperate zones it still performs, but choose your sunniest, most sheltered spot and be ready with a rain cover for the final weeks of October.
Feeding and Watering
Amnesia Haze has a confident feeding drive to match its output, but haze genetics punish overfeeding with clawed, burnt tips. Step strength up gradually.
| Stage | EC | pH | Notes |
|---|---|---|---|
| Seedling | 0.4-0.6 | 6.0-6.5 | Plain water or quarter-strength feed |
| Vegetative | 0.8-1.2 | 6.0-6.5 | Nitrogen-forward, add silica for stems |
| Preflower | 1.2-1.4 | 6.0-6.5 | Transition formula at the 12/12 flip |
| Bloom | 1.4-1.6 | 6.0-6.5 | Phosphorus and potassium forward |
| Flush | 0.0-0.4 | 6.0-6.5 | Final 10-14 days, plain water |
Water when the top inch of the medium has dried, and expect consumption to climb steeply once the big colas form, especially in the warm climates this strain loves. A magnesium supplement mid-bloom heads off the interveinal yellowing that fast sativas often show on older leaves.
Finish with plain water for 10-14 days. The citrus top notes judges keep rewarding are exactly what a dirty finish dulls first.
Flavor, Terpenes, and Effects of Amnesia Haze
The cured flower opens with sharp citrus zest, settles into a pungent, almost incense-like middle, and exits sweet. Six terpenes from the official profile drive that arc. Terpinolene delivers the fresh, citrusy lift at the top, myrcene adds ripe musk beneath it, and caryophyllene with humulene builds the spicy, pungent body that old Amsterdam jars were famous for. Geraniol contributes a sweet, rosy warmth and linalool a soft floral landing, together explaining the sugared exhale.
Pinene and borneol round out the cast quietly. The effect is the textbook that other sativas get graded against: creative and focused from the first minutes, talkative in company, productive alone, with a cheerful munchie-inducing wave later on, so plan snacks. At 18-22% THC it rewards moderate pacing; the experience builds for a quarter hour before it fully declares itself, a classic haze trait worth respecting on first acquaintance.
Harvesting, Drying, and Curing
Watch trichomes from week 7 of bloom. For the energetic, creative character this strain is famous for, harvest when most trichomes are cloudy and amber stays at 5-15%; a heavily amber Amnesia Haze loses the very sparkle people grow it for. Outdoor plants come down in October.
Dry whole branches at 59-68°F and 50-55% humidity for 7-14 days in the dark with gentle airflow, then cure in glass for at least three weeks, burping daily in week one. The pungent-citrus signature deepens dramatically in the jar; a six-week cure turns it from good into cup-worthy.
What to Do With Your Trim
Resin reaches well into the sugar leaves here. Dry-sift the trim for a bright, citrusy kief, wash it into bubble hash, or infuse it in olive oil for an energizing kitchen staple. Lower buds press into a fragrant golden rosin that carries the citrus remarkably intact.
Frequently Asked Questions
Is Amnesia Haze indica or sativa?
It is strongly sativa dominant: 70% sativa to 30% indica. The creative, focused effect and the open bud structure both follow that balance, while the 1.5 m height stays unusually manageable for a haze.
What awards has Amnesia Haze won?
This cultivar won the Cannabis Cup in 2012 and Spannabis titles in 2011, 2015, and 2018, one of the most decorated track records in the Blimburn Seeds catalog.
What is the flowering time of Amnesia Haze?
Just 8-10 weeks after the 12/12 switch, exceptionally quick for a haze. Outdoor plants finish in October.
What is the THC level of Amnesia Haze?
The official range is 18-22%, a solid medium level whose effect feels larger than the number thanks to the energetic terpene profile.
What does Amnesia Haze taste like?
Citrus, pungent, and sweet, led by terpinolene, myrcene, caryophyllene, humulene, geraniol, and linalool. Expect zest up front and incense-like depth behind it.
Is Amnesia Haze good for beginners?
Yes. The official datasheet marks it beginner-suitable: it stays compact, tolerates heat, flowers fast, and forgives small mistakes, an easy introduction to award-winning sativa growing.
