How to Grow Purple Amnesia
Purple Amnesia is a colourful, sativa-leaning feminized strain that pairs the looks of Purple Kush with the lemony lift of Amnesia Lemon. It carries a smooth 18–21% THC, a bright citrus-and-fruit flavour and a famously big yield, all finishing in 8–10 weeks, which is why it has become such a sought-after plant.
The strain, sold on our site as Amnesia Purple, is a cross of Purple Kush and Amnesia Lemon. That pairing gives it the deep purple colouring and resin of a kush alongside the energetic, citrus-forward character of Amnesia, landing at 70% sativa.
Recommended Strains
Amnesia Purple
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THC | 18% - 21% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 30% Indica / 70% Sativa |
Amnesia Auto
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THC | 10% - 19% (Medium) |
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Type | Autoflowering |
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Yield | High |
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Phenotype | 30% Indica / 70% Sativa |
Because it is feminized, productive and forgiving, Purple Amnesia is an easy, rewarding plant to run. You can see the full genetics and buy Purple Amnesia seeds on the strain page.
Strain Profile at a Glance
| THC | 18–21% (medium) |
|---|---|
| Lineage | Purple Kush x Amnesia Lemon |
| Type | Feminized |
| Genetics | 30% Indica / 70% Sativa |
| Climate | Temperate |
| Flowering time | 8–10 weeks |
| Harvest | October (outdoors) |
| Height | 4.92 ft / 1.5 m |
| Yield | High |
| Yield indoor | 1.31–1.64 oz/ft² (400–500 g/m²) |
| Yield outdoor | 42.33 oz/plant (1200 g/plant) |
| Grow difficulty | Beginner-friendly |
| Flavors | Citrus, Fruity, Herbal |
| Effects | Happy, Energetic, Uplifted |
Promos & Deals
Climate and Where to Grow It
Purple Amnesia does best in a temperate climate with warm, mild days and a season long enough for its 8–10 week bloom. Outdoors it finishes around October, so give it a region that stays warm and dry into autumn, because its huge frame needs time and good weather to fill out and ripen.
Its sativa genetics make for an open, airy plant, which helps against mould, but keep humidity moderate and the airflow steady through flowering to protect the resinous buds. At a manageable 1.5 m it is easy to handle, yet a single outdoor plant can reach an enormous harvest when given room, so plan for space.
One of the joys of this strain is its colour. The Purple Kush side turns the buds deep purple when night-time temperatures drop in late flower, so a cool finish outdoors, or slightly cooler lights-off temperatures indoors, brings out those rich violet tones. Keep daytime temperatures around 68–80°F (20–27°C) through the grow.
Growing Basics
As a feminized photoperiod strain, Purple Amnesia gives you virtually all female plants, so there is no need to sex seedlings or cull males. That makes it simpler to run than regular seeds and a good fit for less experienced growers.
Run a vegetative stage under long days, usually 18 hours of light, then switch to a 12/12 light schedule to trigger flowering. Its sativa lean means it stretches hard after the flip, so this feminized plant rewards early topping and low-stress training to control height and open up the canopy before the big colas form.
Feeding Schedule (EC Guide)
Feed to the stage rather than the calendar, starting low and building up as the plant asks for more. A big, hungry plant like this will take a solid bloom feed, but still ease into it so you do not push nutrients faster than the roots can use them.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4–0.6 | Very light feed, focus on healthy root growth |
| Vegetative growth | 0.8–1.2 | Raise nitrogen gently under 18-hour days |
| Early flower | 1.2–1.4 | After the 12/12 flip, shift toward P and K |
| Full flower | 1.4–1.6 | Peak bloom feed while the colas fatten |
| Flush | 0.0–0.4 | Plain water for the final 1–2 weeks |
Flowering Time and Harvest
After the flip to 12/12, Purple Amnesia flowers in 8–10 weeks. The strong sativa lean builds long, resinous colas, and this is a genuinely high-yielding plant: expect 1.31–1.64 oz/ft² (400–500 g/m²) indoors, while a single well-grown outdoor plant can reach a remarkable 42.33 oz (1200 g).
Harvest when most trichomes have turned cloudy with a few amber for the fullest expression, and give the plant a 1–2 week plain-water flush beforehand to clean up the final flavour. If you want the deepest purple colour, let the late-flower nights run a little cool before you cut.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15–18°C) and 55–60% humidity for 7–14 days, until the thin stems snap rather than bend. A slow, even dry preserves both the resin and the colour, which matters a lot with a purple strain you have grown partly for its looks.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure sharpens the citrus top notes, brings out the fruity sweetness and smooths the smoke, giving you the full expression of this Amnesia Lemon cross.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Purple Amnesia is a frosty, resin-coated plant, so the trim is excellent for dry sift, bubble hash or rosin, giving you a bonus run of concentrate from material most growers throw away.
Flavor and Terpenes
Purple Amnesia tastes of bright citrus and sweet fruit over a herbal, slightly spicy base, a lively profile it inherits from the haze-driven Amnesia Lemon side. The lemon-citrus lift is the headline, backed by a fruity sweetness and an earthy, herbal depth.
With a dozen terpenes in play, six lead the character: citral (the clean lemon-citrus note), myrcene (earthy, herbal base), caryophyllene (peppery, spicy warmth), alpha-pinene (fresh, resinous pine), humulene (woody, hoppy depth) and eugenol (a warm, clove-like spice). Behind them sit cedrene, borneol, cadinene, camphene, farnesene and fenchol, a broad supporting cast that rounds out the complex, citrus-herbal profile.
Effects and Best Use
Purple Amnesia reflects its sativa-dominant genetics in the glass as well as the garden. The reported effects are happy, energetic and uplifted, a bright, upbeat character that suits daytime use, creative sessions and staying active rather than winding down.
With its medium 18–21% THC it stays approachable rather than overwhelming, so it is easy to enjoy through the day. Paired with its eye-catching purple looks and zesty citrus flavour, it makes a strain that is as enjoyable to grow and show off as it is to smoke.
FAQ
Is Purple Amnesia indica or sativa?
It is sativa-dominant, at 70% sativa and 30% indica, so it grows tall and airy and the effect is bright and energetic.
Is Purple Amnesia the same as Amnesia Purple?
Yes. The strain is sold on our site as Amnesia Purple and is also widely searched as Purple Amnesia. It is a feminized cross of Purple Kush and Amnesia Lemon.
How long does Purple Amnesia take to flower?
About 8–10 weeks after the flip to 12/12. Grown outdoors in a temperate climate it finishes around October.
Why do the buds turn purple?
The Purple Kush heritage brings out purple colouring when night-time temperatures drop in late flower. A cool finish deepens those violet tones.
What does Purple Amnesia taste like?
Expect bright citrus and sweet fruit over a herbal base, driven by its citral, myrcene, caryophyllene and alpha-pinene, with a lemony haze lift.
How much does Purple Amnesia yield?
It is a high producer: 1.31–1.64 oz/ft² (400–500 g/m²) indoors, and a single outdoor plant can reach an enormous 42.33 oz (1200 g) in a good season.
