How to Grow Purple Haze
Purple Haze is a legendary, colorful sativa hybrid born from Haze and Purple Thai. It is a 60/40 sativa-dominant feminized plant with an approachable, medium 14-18% THC, an earthy, incense, sweet and woody flavor, and a happy, uplifted, mellow effect. Tall, purple-tinged and classically psychedelic in character, it is a rewarding way to grow a piece of cannabis history.
This is a feminized photoperiod strain, so every seed grows into a flowering female and you start flowering by switching the light cycle to 12/12, which lets you decide how big the plant gets before you flip it. That control matters here, because this is a vigorous, stretchy sativa that can reach around 2 m, so the flip is your main tool for managing its height, and its Purple Thai side brings out the striking purple coloring it is named for.
Recommended Strains
Purple Haze
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THC | 14% - 18% (Medium) |
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Type | Feminized |
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Yield | Medium |
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Phenotype | 40% Indica / 60% Sativa |
Purple Haze Autoflower
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THC | 14% - 16% (Medium) |
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Type | Autoflowering |
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Yield | High |
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Phenotype | 20% Indica / 80% Sativa |
Colorful, aromatic and classic, Purple Haze is a rewarding way to grow an heirloom-style sativa. You can see the full genetics and buy Purple Haze seeds on the strain page, and browse the rest of our sativa seeds alongside it.
Strain Profile at a Glance
| THC | Medium (14-18%) |
|---|---|
| Lineage | Haze x Purple Thai |
| Type | Feminized (photoperiod) |
| Genetics | 60% Sativa / 40% Indica |
| Climate | Tropical, warm |
| Flowering time | 8-10 weeks |
| Harvest (outdoor) | October |
| Height | 6.56 ft / 2 m |
| Yield indoor | 1.15-1.31 oz/ft² (350-400 g/m²) |
| Yield outdoor | 12.35 oz/plant (350 g/plant) |
| Grow difficulty | Beginner-friendly, but needs height management |
| Flavors | Earthy, Incense, Sweet, Woody |
| Effects | Happy, Uplifted, Mellow |
Promos & Deals
Growing a Feminized Strain
Purple Haze is a feminized photoperiod strain, so every seed grows into a flowering female and there is no sexing and no males to remove. Because it flowers on the light cycle rather than on age, you control the timing, and with a vigorous sativa that control is essential: keep it under long 18/6 days only as long as you have room for, then switch to 12 hours of light and 12 of darkness to start flowering and cap its final height.
The big thing to plan for is size. This is a stretchy, 60% sativa that can reach around 2 m and will stretch significantly when it flips, so flip it earlier than you would an indica. Indoors, training helps a lot: top it early, use LST or a ScrOG net to spread the canopy and keep the colas level, and support the long flowering branches. It is forgiving, beginner-friendly genetics at heart, but the height means it rewards a grower who can give it space.
Climate and Where to Grow It
Purple Haze does best in a warm, tropical climate with plenty of sun, steady warmth and good airflow, in keeping with its haze and Purple Thai heritage. It is adaptable and handles a long season well, so it suits outdoor growing in a warm region, finishing around October in the Northern Hemisphere. Cooler nights late in flower help bring out its signature purple coloring.
It gives a moderate yield of around 350-400 g/m² indoors and around 350 g per plant outdoors, grown as much for its color, aroma and classic effect as for sheer weight. As a tall, sativa-dominant plant of around 2 m, the main job is managing its height and keeping the canopy open so light and air reach the lower buds. Give it space and support, and it rewards you with long, colorful colas.
Keep humidity sensible through flowering: around 55-60% in veg, nearer 40% as the flowers fill out, and lower toward harvest. Its airy sativa buds dry well but still benefit from steady airflow to finish clean and protect that incense-like aroma. Let the nights cool a few degrees late in flower to deepen the purple color, and aim for daytime temperatures around 68-80°F (20-27°C).
Feeding Schedule (EC Guide)
Purple Haze is a moderate feeder that responds well to steady, balanced nutrition rather than heavy feeding. Build the feed up gradually through veg, push phosphorus and potassium once it is in flower to fuel the long colas, then taper off for the final flush so the earthy, incense and sweet flavor comes through clean. The ranges below are a starting guide; adjust to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4-0.6 | Very light feed while roots establish |
| Vegetative | 0.8-1.2 | Raise nitrogen as the plant builds size |
| Early flower | 1.2-1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4-1.6 | Peak bloom feed while the long colas swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
Once you switch Purple Haze to a 12/12 light cycle it flowers in about 8 to 10 weeks, filling out with long, resinous, classically sativa colas on a tall, open frame. With a cool finish it develops the deep purple coloring it is famous for, alongside its earthy, incense-like, woody-sweet aroma. Outdoors in the Northern Hemisphere it is ready to harvest around October.
Yields are moderate: around 350-400 g/m² indoors and around 350 g per plant outdoors with room to stretch and good light. Keep the canopy level and the lower branches supported so every cola gets light, feed it steadily through flower, and harvest when most of the trichomes have turned cloudy for the fullest earthy-incense flavor, the deepest color and the brightest effect.
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 matters even with airier sativa buds, because it protects the incense-like aroma, the trichomes and the purple color, and a gentle dry keeps that classic character intact.
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 is what brings out the earthy, incense, sweet and woody notes and smooths the smoke, which matters most on a classic like Purple Haze where that complex, incense-like character and deep color are the whole appeal.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Purple Haze is a resinous sativa, so its trim works well for dry sift, bubble hash or rosin, carrying over its earthy, incense-like aroma. Saving the trim is an easy way to get a flavorful, aromatic extract from material most growers would otherwise throw away.
Flavor and Terpenes
Purple Haze leads with an earthy, incense, sweet and woody flavor, the complex, almost perfumed profile that made this classic so distinctive. It is a smooth, aromatic smoke, and a good cure really brings that incense-like, earthy-sweet character forward in the jar and on the inhale.
Its terpene profile shapes that character. Myrcene drives a sweet, earthy base, while caryophyllene adds a warm, peppery, incense-like spice and terpinolene brings the fresh, herbal lift that is a signature of haze strains. Linalool contributes a soft, floral note, with p-cymene adding a woody, spicy edge. Together these terpenes frame the earthy, incense, sweet and woody character Purple Haze is known for.
Effects and Best Use
With its approachable, medium 14-18% THC and sativa-leaning 60/40 make-up, Purple Haze delivers a bright, smooth experience. It is reported as happy and uplifted, a classic cheerful, creative sativa head with a gentle, mellow body, so it is a natural daytime strain for staying active, social and in a good mood. Its medium potency keeps it approachable and easy to enjoy rather than overwhelming.
That happy, uplifted, mellow profile makes it a great daytime and social strain, good for creative projects, conversation and staying upbeat while enjoying its complex, incense-like flavor. The combination of an approachable effect, that striking purple color and a genuinely classic character is exactly why Purple Haze has stayed a legend for decades.
Common Problems and Pro Tips
The main challenge with Purple Haze is its height, so plan for it from the start: top the plant early, train it with LST or a ScrOG net, and flip to 12/12 before it outgrows your space, remembering it can stretch a lot in early flower. Support the long, colorful colas so they do not bend under their own length late in flower.
To get the famous purple coloring, let the nights cool by a few degrees in the last couple of weeks of flower. Because it is an adaptable, heat-loving sativa, it is forgiving once established, so start seedlings gently to avoid transplant stress and then let its hardy haze genetics do the work. Keep the air moving around its airy colas to help them finish clean.
As a pro tip, protect the terpenes and color that make this strain special: go gentle on the nutrients, finish with a proper plain-water flush, and give it a full three to four week cure. Harvest when most trichomes are cloudy for a bright, medium-strength result with the earthy, incense-like taste and deep purple looks Purple Haze is prized for.
FAQ
Is Purple Haze a feminized strain?
Yes. Purple Haze is a feminized photoperiod strain, so every seed grows into a flowering female and there is no sexing and no males to remove. Because it flowers on the light cycle rather than on age, you veg it under long 18/6 days, then switch to 12/12 to start flowering, which with a tall sativa like this is your main tool for controlling the final height.
How tall does Purple Haze grow?
Purple Haze is a tall, stretchy sativa that can reach around 2 m and stretches significantly when it flips to flower. Indoors, plan to manage it: top it early, use LST or a ScrOG net to spread the canopy, flip to 12/12 sooner than you would an indica, and support the long colas so they do not bend late in flower.
How do I get Purple Haze to turn purple?
The purple color comes out when the nights cool by a few degrees in the last couple of weeks of flower. It is a genetic trait from its Purple Thai side, so a cool, dry finish encourages the pigments to show in the buds and leaves. A slow, gentle dry then helps preserve that deep purple color through to the jar.
How much THC does Purple Haze have?
Purple Haze is a medium-THC strain, testing from around 14% up to 18%, which gives a bright, approachable effect rather than an overwhelming one. Combined with its sativa-leaning 60/40 genetics, the result is a happy, uplifted and mellow experience with a classic cerebral lift. That moderate potency makes it easy to enjoy and a good fit for daytime use.
What does Purple Haze taste like?
Purple Haze has an earthy, incense, sweet and woody flavor, a complex, almost perfumed profile. Myrcene drives the sweet, earthy base, caryophyllene adds an incense-like peppery spice, terpinolene a fresh herbal lift, and linalool a soft floral note. A proper three to four week cure really brings that incense-like, earthy-sweet character forward on the inhale.
Is Purple Haze good for beginners?
Yes, with one caveat. Purple Haze is feminized so there is no sexing, and its hardy haze genetics are forgiving, so it is beginner-friendly in that sense. The main thing to manage is its height, since it is a tall sativa, so give it vertical room and some simple training, and newer growers will find it a rewarding, colorful crop.
