How to Grow Purple Thai Regular
Purple Thai Regular is an exotic, sativa-dominant strain that brings together Purple Haze and Meo Thai into a striking, purple-hued classic. It carries a potent 22–24% THC, a berry-sweet flavour and a happy, uplifted, relaxed effect, on a tall, long-flowering plant that rewards patience with a generous, high-quality harvest.
Built as an F3 hybrid of Purple Haze x Meo Thai, this is a 70% sativa, 30% indica cross with true Thai heritage. That landrace background is what gives it the vivid purple colouring and the energetic, clear-headed character, but it also means a long bloom and a plant best suited to growers who enjoy the process.
Recommended Strains
Purple Thai Regular
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THC | 22% - 24% (High) |
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Type | Regular |
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Yield | High |
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Phenotype | 30% Indica / 70% Sativa |
Afghan Kush x Blueberry
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THC | 18% - 20% (Medium) |
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Type | Feminized |
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Yield | Medium |
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Phenotype | 70% Indica / 30% Sativa |
As a regular strain, it produces both male and female plants, making it a favourite with breeders and purists who want to work with the genetics. You can see the full lineage and buy Purple Thai Regular seeds on the strain page, or find your strain across the whole catalogue.
Strain Profile at a Glance
| THC | 22–24% (high) |
|---|---|
| Lineage | F3 hybrid (Purple Haze x Meo Thai) |
| Type | Regular |
| Genetics | 70% Sativa / 30% Indica |
| Climate | Temperate |
| Flowering time | 16–20 weeks |
| Harvest | November |
| Height | 4.92 ft / 1.5 m |
| Yield | High |
| Yield indoor | 1.31–1.64 oz/ft² (400–500 g/m²) |
| Yield outdoor | 17.64–19.4 oz/plant (500–550 g/plant) |
| Grow difficulty | For patient growers |
| Flavors | Berry, Sweet |
| Effects | Happy, Relaxed, Uplifted |
Promos & Deals
Climate and Where to Grow It
Purple Thai Regular suits a temperate climate, but its long bloom means it really wants a warm, long season. Outdoors it does not finish until around November, so it is best in regions with mild, dry late autumns, or grown indoors where you fully control the environment.
Its Thai sativa roots mean plenty of flowering stretch, so although it is listed at around 1.5 m, expect it to reach for height during a long bloom and plan your space accordingly. A single well-grown plant can bring in a generous 500–550 g outdoors. The purple colouring tends to deepen as nights cool toward the finish, which is part of this strain’s appeal.
Indoors, keep daytime temperatures around 68–82°F (20–28°C), give it room to stretch, and keep steady airflow through the long flowering period to protect the buds from damp.
Working with Regular Seeds
Because these are regular seeds, roughly half your plants will be male and half female. For a bud harvest you need the females, which show thin white pistils (hairs) at the nodes a couple of weeks into flowering. Males instead form small round pollen sacs, and you remove them before they open so they cannot pollinate the females.
If you want to breed or make your own seeds, this is exactly where regular genetics shine: keep a healthy male and let it pollinate a chosen female to preserve and work this Thai line. For most growers, though, the plan is simple: identify the sexes early, cull the males, and let the females finish into resinous, seedless flowers.
Feeding Schedule (EC Guide)
With such a long flowering period, feed steadily rather than hard, giving the plant what it needs across many weeks of bloom. Start low, build up gradually, and taper off for the final flush so the flavour stays clean.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4–0.6 | Very light feed, focus on healthy root growth |
| Vegetative growth | 0.8–1.2 | Build the frame, raise nitrogen gradually |
| Early flower | 1.2–1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4–1.6 | Peak bloom feed through the long flowering stretch |
| Flush | 0.0–0.4 | Plain water for the final 1–2 weeks |
Flowering and Harvest
Once you flip to a 12/12 light cycle, bloom runs a long 16–20 weeks, which is typical of pure Thai sativa lines and the main thing to plan for. The sativa structure means airy, elongated colas rather than squat indica nuggets, and some early training helps keep the tall canopy even and well lit.
Patience is rewarded here. As the weeks pass, the signature purple tones come through, especially where nights are cool, and the plant stacks resinous, high-THC flowers. Harvest when most trichomes have turned cloudy with a few amber for the fullest expression, and run a short plain-water flush in the last week or two 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 purple colour and the berry aroma, and stops the airy sativa buds drying too fast on the outside.
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 brings the sweet, berry character forward and smooths the smoke, which is a fitting reward after such a long grow.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Purple Thai Regular is a resinous, high-THC 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 Thai Regular tastes of berry and sweetness, a soft, fruity profile that pairs beautifully with its purple looks. It is a dessert-like aroma rather than an earthy or sharp one, and a lovely counterpoint to its energetic haze-leaning effect.
Five terpenes shape it. Myrcene anchors the fruity, berry base and lends a soft sweetness; linalool adds a floral, slightly sweet note; terpinolene brings a fresh, uplifting lift typical of sativas; caryophyllene adds a peppery, spicy warmth; and p-cymene rounds it out with a fresh, woody edge. Together they give a sweet, berry-forward flavour with a bright, aromatic finish.
Effects and Best Use
With its 70% sativa base, Purple Thai Regular is reported as happy, uplifted and relaxed. It is a bright, clear-headed profile that leans toward daytime and social use, with just enough body ease to keep it balanced rather than purely racy.
At a potent 22–24% THC it is a strong strain, so a little goes a long way, especially for less experienced users. That high potency, the energetic head and the sweet, berry flavour make it a rewarding, characterful choice for anyone who appreciates a classic Thai sativa and is willing to wait for it.
Common Problems and Pro Tips
Purple Thai Regular is a demanding grow listed for patient growers, because it is a pure-Thai sativa with an exceptionally long bloom.
- Plan for a very long bloom: it flowers for 16 to 20 weeks and finishes in November, so feed it through the whole window and only grow it if you can commit the time.
- Sort the males and the stretch: as a regular strain it produces both sexes, so pull the males early, and flip sooner or use a SCROG net to tame its big Thai stretch.
- Use cool nights for colour: its Purple Haze side turns the buds vivid purple when late-flower nights run cool, so a slight temperature drop deepens that colour.
Expert tip: this is an exotic, high-THC landrace-style sativa that rewards patience more than almost anything in the catalog. A slow dry and a careful cure protect its sweet, berry-forward flavour.
Frequently Asked Questions
Is Purple Thai Regular indica or sativa?
It is sativa-dominant, at 70% sativa and 30% indica, which gives it a bright, uplifting, clear-headed effect with a light body side. That pure-Thai sativa heritage also means a very tall, stretchy plant and a long bloom, so train it hard and give it plenty of headroom.
How long does it take to flower?
A long 16 to 20 weeks once you switch to a 12/12 light cycle, typical of pure Thai sativa lines, with outdoor plants finishing around November. This is one of the longest blooms in the catalog, so only grow it if you can feed and tend it through that extended window.
Are these feminized seeds?
No. Purple Thai Regular are regular seeds, so they produce both male and female plants. Remove the males early if you only want buds, or keep one for breeding. Check the pre-flowers in early bloom so you catch the males before they open and pollinate the females you want to keep.
Why is it called Purple Thai?
It inherits vivid purple tones from its Purple Haze parent, which deepen as nights cool toward harvest, on top of its exotic Meo Thai sativa heritage. The colour is cosmetic rather than a sign of potency, so chase cooler late-season nights only if you want that vivid violet look.
What does Purple Thai Regular taste like?
Expect a sweet, berry-forward flavour with a fresh, aromatic edge, driven by its myrcene, linalool, terpinolene and caryophyllene terpenes. Dry slowly in a cool, dark space and cure in jars so that sweet, exotic Thai character comes through at its best in the finished flower after harvest.
How much does it yield?
It is a high producer: 1.31 to 1.64 oz/ft² (400 to 500 g/m²) indoors, and 17.64 to 19.4 oz (500 to 550 g) per plant outdoors in a good season. Training the tall Thai stretch into an even canopy and feeding through the long bloom help it reach the top of that range.
