Purple Haze Strain Autoflower SeedsThe Hendrix-era sativa, rebuilt to bloom by itself in about two months
4.75 out of 5 · 4 reviewsThe Purple Haze strain in this pack is the autoflowering take on the old Purple Thai × Haze sativa. Ruderalis genetics make each plant switch to bloom by age, not by day length, so a full run from seed to harvest takes roughly 8 to 10 weeks under one light schedule. Plants stay far shorter than a photoperiod Haze, keep the berry and earthy-spice smell, and can turn violet late in flowering.
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What is the Purple Haze strain?
Purple Haze Auto is an autoflowering, sativa-leaning version of the classic Purple Haze (Purple Thai × Haze), made by crossing it with Cannabis ruderalis. Seed companies that sell it put the whole life cycle at roughly 8 to 10 weeks, THC around 16–18% and plants of roughly 50–70 cm indoors. Purple Haze Auto keeps the parent's sweet berry and earthy aroma and its upbeat, creative reputation, while losing the long bloom and big stretch of a photoperiod Haze.
Ratio from MSNL's autoflower listing; Zamnesia simply calls its version an auto sativa. Ruderalis is not counted in either figure.
Photoperiod Haze lines can need 10 weeks of bloom alone; Purple Haze Auto is listed at about 8–10 weeks for the whole life cycle.
Purple Haze strain specs
These Purple Haze Auto figures come from seed companies that sell an autoflowering version (Zamnesia and MSNL, as recorded on SeedFinder and their own pages). Breeders disagree on height in particular, so both ends of the published range are shown. None of them is a Beaver Seeds lab result.
| Type | Sativa-leaning autoflower, about 60% sativa / 40% indica before ruderalis |
|---|---|
| Genetics | Purple Haze (Purple Thai × Haze) × Cannabis ruderalis |
| Bred by | Original Purple Haze breeder not on record; autoflower versions are made by several seed companies |
| THC | About 16–18% (Zamnesia lists 16%, MSNL up to 18%) |
| CBD | Low, under 1% |
| Main terpenes | Myrcene, caryophyllene, limonene, humulene |
| Aroma & flavor | Sweet berry, grape, damp earth, wood and a faint lavender note |
| Reported effects | Uplifting, creative, energetic, long-lasting |
| Seed type | Autoflowering feminized (female plants) |
|---|---|
| Seed to harvest | About 8–10 weeks (roughly 60–70 days) |
| Outdoor harvest | 8–10 weeks after planting out; MSNL lists late October as the latest finish |
| Height | 50–70 cm indoors per Zamnesia, about 120 cm outdoors; MSNL lists up to 180 cm |
| Yield | About 400–500 g/m² indoors per MSNL; Zamnesia rates it high for an auto |
| Difficulty | Easy |
| Best methods | Early LST, light SCROG; skip heavy topping |
| Climate | Indoors, or temperate to Mediterranean gardens; can be sown more than once a season |
Where does the Purple Haze strain come from?
Purple Haze Auto was made by pairing the photoperiod Purple Haze, itself a Purple Thai × Haze sativa, with Cannabis ruderalis to give it the autoflowering trait. Purple Haze is famous mostly for its name, borrowed from the 1967 Jimi Hendrix song; no reliable source names who first made the Purple Thai × Haze cross, and the original breeder of the photoperiod strain remains unknown.
The autoflower lines are newer and belong to individual seed companies. SeedFinder records Zamnesia's Purple Haze Automatic as Purple Haze × an unnamed ruderalis, and MSNL lists its version as Purple Thai × Haze × Ruderalis. Because each company uses its own ruderalis partner and selection, Purple Haze Auto plants from different sources can vary in height and finish time, which is why the published numbers spread as widely as they do.
What changes between Purple Haze Auto and the feminized Purple Haze?
Timing is what changes most: Purple Haze Auto begins blooming on its own around its fourth week of life, whereas the feminized Purple Haze needs 12-hour nights before it will flower for 8 to 10 weeks. Counted from sprouting, the autoflower is a crop of roughly two months, against three to four months for the photoperiod plant once veg time is added. The auto is also shorter, and its THC listings sit a little lower, around 16–18%.
Trade-off to know about. Purple Haze Auto cannot be held in veg to grow bigger or kept as a mother plant for cuttings. If you want to clone or shape a large plant, the feminized photoperiod version suits that better.
What does Purple Haze taste like, and how does it feel?
Aroma and flavor
Purple Haze Auto tastes sweet and berry-like with grape and earthy notes, finishing woody with a light floral touch that Zamnesia describes as lavender.
- Berry
- Grape
- Earth
- Wood
- Lavender
- Sweet
Terpenes
- Myrcene
- Earthy, musky base under the fruit
- Caryophyllene
- Pepper and wood on the finish
- Limonene
- A light citrus lift
- Humulene
- Dry, hoppy, woody edge
Purple Haze Auto terpenes are listed by MSNL; other sellers publish none, so use the mix as a rough guide.
Reported effects
Purple Haze Auto is described as an uplifting, creative sativa high that lasts a good while, in line with how users rate the photoperiod Purple Haze on AllBud and Weedmaps: energetic and happy rather than heavy. Its indica share is a little larger than in many Haze lines, so some people notice more body calm near the end.
- Uplifting
- Creative
- Energetic
- Happy
- Talkative
Purple Haze Auto's likely downsides are dry mouth, dry eyes and, for people sensitive to sativas, a jittery or racing feeling at higher doses.
These Purple Haze effects combine seed-company descriptions of the auto with user reviews of the parent strain on AllBud and Weedmaps. Everyone reacts differently, and nothing here is medical advice.
How do you grow Purple Haze seeds?
Purple Haze Auto seeds suit beginners: plant each one in its final container, run a single light cycle (18/6 and 20/4 are common) from start to end, shape the plant only during its first month, and expect to cut it roughly 60 to 70 days after it breaks the soil.
- Germinate3–7 days
Plant each Purple Haze Auto seed where it will finish, because repotting an autoflower costs growing days it can't get back.
- Early growthWeeks 1–4
Bend and tie the main stem from about week 2 or 3 to open the plant; this short window is the only time to shape it.
- FlowerWeeks 4–9
Around week 4, Purple Haze Auto shows its first pistils without any light change. Cooler nights near the end can bring out purple shades on plants that carry them.
- HarvestAbout 60–70 days from seed
Taller sativa-leaning plants can need the full 10 weeks, so go by milky trichomes, not the calendar.
Grow tips for Purple Haze
- Use a big final pot from day one. A 10–15 litre (3–4 gallon) pot gives Purple Haze Auto's roots room in its short life without any transplant stall.
- Choose LST over topping. MSNL advises against topping or supercropping this auto; gentle low-stress training spreads the sativa colas instead.
- Plan for two heights. Some Purple Haze Auto phenotypes stop near 60 cm while others stretch past a metre, so leave headroom until you see which you have.
- Feed lightly. Autoflowers like Purple Haze Auto need less nutrient than a photoperiod Haze; start at half strength and raise slowly.
- Use the season twice outdoors. Because Purple Haze Auto ignores day length, you can put out one batch in late spring and a second in early summer, and both can finish before autumn rain.
Is Purple Haze the right strain for you?
Great pick if you
- Want a classic sativa flavor without a 10-week Haze bloom
- Grow in a compact tent, a closet or a sunny balcony
- Are new to growing and want one light schedule start to finish
- Like the chance of purple-tinted buds
- Want to fit two outdoor crops into one summer
Think twice if you
- Want the highest THC available (Purple Haze Auto lists around 16–18%)
- Plan to take cuttings or keep a mother plant
- Prefer a heavy, sleepy indica for late nights
- Like to top and supercrop every plant hard
Purple Haze strain FAQ
Is Purple Haze Auto sativa or indica?
Purple Haze Auto is sativa-leaning. MSNL lists its version as about 60% sativa and 40% indica, not counting the ruderalis added for autoflowering, and Zamnesia calls its line an auto sativa. The photoperiod Purple Haze it comes from is more strongly sativa.
How fast is Purple Haze Auto from seed?
Purple Haze Auto finishes in roughly 60 to 70 days counted from germination. Zamnesia gives 8–9 weeks for the full cycle and MSNL 8–10 weeks. Taller, more sativa plants tend to take the longer end.
Do Purple Haze Auto plants need 12-hour nights to flower?
No. Purple Haze Auto flowers by age because of its ruderalis genetics, so you can run 18/6 or 20/4 from sprouting to harvest. Changing the light schedule will not make it start or finish sooner.
How much THC does Purple Haze Auto have?
Seed companies list Purple Haze Auto at about 16–18% THC, with low CBD. Zamnesia gives 16% and MSNL up to 18%. Results depend on the phenotype, light and when you harvest.
How tall does Purple Haze Auto grow?
Purple Haze Auto usually stays around 50–70 cm (20–28 in) indoors according to Zamnesia, with outdoor plants reaching about 120 cm (4 ft). MSNL lists a wider range of up to 180 cm, so some sativa phenotypes stretch more.
Will Purple Haze Auto buds turn purple?
Some Purple Haze Auto plants turn violet late in bloom, a trait inherited from the Purple Thai side, but not all of them do. Cooler night temperatures in the last weeks can deepen the color on plants that carry it. Color does not change potency.
What does Purple Haze Auto smell like?
Purple Haze Auto smells sweet and berry-like with grape, earth and wood, plus a light floral note. Myrcene, caryophyllene, limonene and humulene are the terpenes listed for it.
How much does Purple Haze Auto yield?
MSNL lists Purple Haze Auto at about 400–500 g/m² indoors under good conditions, and Zamnesia rates its yield as high for an autoflower. Pot size, light strength and early training make the biggest difference.
Purple Haze reviews
4.75 out of 5 from 4 reviews
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4 reviews for Purple Haze Autoflowering Feminized Marijuana Seeds
Purple Haze's relatives and similar strains
Purple Haze Feminized
Purple Thai Feminized
Haze Autoflowering Feminized
Amnesia Haze AutofloweringBeaver Seeds sells cannabis seeds for collection and genetic preservation where permitted. Check the laws in your state, province or country before germinating seeds. Effects are user-reported and are not medical claims.
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RichieHayesss –
Purple Haze was a really uplifting and energizing strain for me. The high felt clear and creative, giving me a nice boost in mood without being too intense. It’s great for staying active, social, or just getting into a creative mindset.
Ava –
Classic hazy head buzz with creative lift. Light body feel and smooth smoke.
derekcarter –
I recently tried Purple Haze and really enjoyed it. The high is sooo energizing, perfect for getting creative or for socializing. The flavor is smooth, and the effects hit without being too intense. I also have to give a shoutout to the discreet packaging, it arrived neatly and securely, which I really appreciated.
Joshua Q. –
I am very satisfied with this! I am a first time grower and this strain is just hassle-free to cultivate. I grew it indoors but the buds were still as spiky and purple as it could get. I love how it smelled so good too, with its very fruity flavor and notes of earth. I couldn’t get enough of it! This strain will really give you that relaxing euphoric high perfect for those who are fatigued. Totally worth a try!