How to Grow Purple Star Killer
Purple Star Killer is a potent, indica-dominant feminized strain that pairs a citrus, fruity and kushy flavor with heavy resin and a very high 25-29% THC. It is a 70/30 indica-leaning plant with a relaxed, happy, night-time effect, a sturdy frame of around 1.5 m, and huge yields, especially outdoors. Colorful, resinous and easy to grow, it is a rewarding high-THC plant for new and experienced growers alike.
This is a feminized, photoperiod strain, so every seed grows into a flowering female and you never have to identify the sex or remove males. It flowers in response to the light cycle rather than on a timer, so indoors you switch it to 12/12 to start flowering once it has reached the size you want, and outdoors it finishes around October. Its dense, resinous, purple-tinged structure comes from a Purple Kush and Star Killer heritage, both known for color and potency.
Recommended Strains
Purple Star Killer
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THC | 25% - 29% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 70% Indica / 30% Sativa |
Purple Star Killer HMC Edition
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THC | 25% - 29% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 70% Indica / 30% Sativa |
Rich, colorful and heavy with resin, Purple Star Killer is a flavorful way to grow a high-THC indica. You can see the full genetics and buy Purple Star Killer seeds on the strain page, and browse the rest of our feminized seeds alongside it.
Strain Profile at a Glance
| THC | High (25-29%) |
|---|---|
| Lineage | Purple Kush x Star Killer |
| Type | Feminized (photoperiod) |
| Genetics | 70% Indica / 30% Sativa |
| Climate | Temperate |
| Flowering time | 8-10 weeks |
| Harvest (outdoor) | October |
| Height | 4.92 ft / 1.5 m |
| Yield indoor | 1.64-1.8 oz/ft² (500-550 g/m²) |
| Yield outdoor | 35.27 oz/plant (1000 g/plant) |
| Grow difficulty | Easy, beginner-friendly |
| Flavors | Citrus, Fruity, Kush, Woody |
| Effects | Relaxed, Happy, Night-time |
Promos & Deals
Growing a Feminized Strain
Purple Star Killer is a feminized, photoperiod plant, so it flowers in response to the light cycle rather than on a timer. Indoors you grow it under long days of around 18 hours of light while it builds size, then switch to a 12/12 cycle to trigger flowering once it has reached the height and shape you want. Outdoors it follows the seasons and flowers as the days shorten, finishing around October. Because the seeds are feminized, every plant grows into a flowering female, so there is no sexing and no need to remove males.
Being photoperiod, it gives you full control over the vegetative stage: veg it longer for a bigger plant or flip it early to keep it compact. At around 1.5 m it is a manageable medium height indoors, while outdoors it can get much larger and reach its huge yield potential. Give it a little low-stress training during veg to open the canopy, and it builds the dense, resinous, often purple-tinged colas its Purple Kush and Star Killer heritage is known for, which keeps it beginner-friendly despite its very high potency.
Climate and Where to Grow It
Purple Star Killer does well in a temperate or Mediterranean-style climate with plenty of sun, steady warmth and good airflow. Outdoors it finishes around October, so it suits regions where the early autumn stays dry and mild enough for a dense, 70% indica plant to ripen its resinous buds without moisture problems. Cooler nights late in flower can help bring out its purple tones.
It performs strongly both indoors and out, and it is a standout outdoor producer. Indoors it returns a healthy 500-550 g/m² in a well-managed tent, while outdoors, given room for the roots and full sun, a single plant can reach an enormous 1000 g. At a manageable 1.5 m indoors it is easy to handle, so as a mostly indica plant the main job is keeping the canopy open so light and air reach the lower buds.
Keep humidity under control through flowering to protect the dense, resinous buds: around 55-60% early on, nearer 40-45% as the flowers fill out, and lower toward harvest. A very high-THC, resin-heavy indica can trap moisture inside its chunky colas, so steady airflow and sensible humidity keep the finish clean. Aim for daytime temperatures around 72-82°F (22-28°C), which this temperate-climate plant enjoys.
Feeding Schedule (EC Guide)
Purple Star Killer is a moderate feeder that responds well to a steady, measured feeding schedule. Build nutrients up gradually through the vegetative stage, then shift toward bloom nutrients once it flips to flower and the buds begin to swell. Taper off for the final flush so the citrus-and-kush flavor comes through clean and the smoke finishes smooth. 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 buds swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
Indoors, Purple Star Killer flowers in about 8 to 10 weeks once you switch it to a 12/12 light cycle, while outdoors it ripens around October as the days shorten. It fills out with dense, chunky, resin-coated buds on a sturdy indica-dominant frame, often with attractive purple tones from its Purple Kush side. A mostly indica plant like this tends to ripen evenly, which makes timing the harvest straightforward.
Yields are strong indoors and exceptional outdoors: around 500-550 g/m² in a tent and a huge 1000 g per plant outdoors with full sun, space and a long season. Give it light training so the lower buds get light, feed it steadily through its cycle, and harvest when most of the trichomes have turned cloudy for the fullest citrus-and-kush flavor and the best of its very high THC.
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 with such a resinous, high-THC indica, because its dense buds can stay damp in the middle while the outside dries, and a gentle dry protects both the aroma and the trichomes, along with any purple color.
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 citrus, fruity, kush and woody notes and smooths the smoke, which matters on a resin-heavy hybrid like this where that rich, chunky bud character is the main attraction.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. Purple Star Killer is an extremely resinous, trichome-heavy plant, so its trim works especially well for dry sift, bubble hash or rosin. Given its very high THC and heavy resin, that trim makes for a strong, citrus-and-kush concentrate run from material most growers would otherwise throw away.
Flavor and Terpenes
Purple Star Killer has a rich, layered flavor: a citrus and fruity lift over a deep, earthy kush base with a woody edge, carrying the character of its Purple Kush and Star Killer heritage. It is a bold, fruity-and-kushy profile, and a good cure really brings that contrast forward in the jar and on the inhale.
Its terpene profile shapes that character. Myrcene lays down the earthy, slightly fruity base that defines its kush side, while caryophyllene adds a warm, peppery spice. Terpinolene and p-cymene bring the woody, fresh edge, and linalool contributes a soft, floral sweetness, with a bright citrus note lifting the top. Together these terpenes frame the citrus, fruity, kush and woody character Purple Star Killer is known for.
Effects and Best Use
With its very high 25-29% THC and indica-dominant 70/30 make-up, Purple Star Killer delivers a strong, full-bodied experience. It is reported as relaxed, happy and night-time leaning, pairing a deep, settled body with a cheerful head, so it is best suited to the evening and the end of the day. Because the THC runs very high, it is worth starting with a small amount, especially if you have a lower tolerance.
That relaxed, happy, night-time profile makes it a natural evening strain, ideal for winding down while enjoying its rich citrus-and-kush flavor. The combination of heavy potency, a colorful, flavorful profile and a huge-yielding, easy grow is exactly what makes it stand out.
Common Problems and Pro Tips
The main thing to manage with Purple Star Killer is its dense, resin-heavy buds. On a 70% indica with thick colas, trapped humidity is the biggest risk late in flower, so keep the air moving, hold humidity down as the flowers fill out, and defoliate a few of the largest fan leaves in mid-flower so light and air reach the lower buds. A tidy canopy keeps the whole plant ripening evenly.
Because it is photoperiod, you can decide its final size: veg it longer or flip early indoors, and give it low-stress training during veg to spread the canopy. Outdoors it can get very large and carry a heavy harvest, so stake or support the main branches before the colas add weight, since a well-fed plant of this size can carry a lot by the end of flower.
As a pro tip, feed it steadily rather than hard: it is a moderate feeder, so build nutrients up gradually and ease off into a plain-water flush for the last week or two to keep the citrus-and-kush flavor clean. Harvest when most trichomes are cloudy, give it a full three to four week cure, and start with a small amount given its very high THC.
FAQ
Is Purple Star Killer an autoflower?
No. Purple Star Killer is a feminized, photoperiod strain, so it flowers in response to the light cycle rather than on a timer. Indoors you switch it to a 12/12 cycle to trigger flowering, and outdoors it flowers as the days shorten, finishing around October. Every seed grows into a flowering female, so there is no sexing and no males to remove.
How much THC does Purple Star Killer have?
Purple Star Killer is a very high-THC strain, testing at around 25-29%, which is strong even among modern hybrids and comes from its potent Purple Kush and Star Killer heritage. Combined with its indica-dominant 70/30 genetics, the result is a relaxed, happy, night-time effect. Because the THC runs so high, it is worth starting with a small amount if your tolerance is lower.
How long does Purple Star Killer take to flower?
Purple Star Killer flowers in about 8 to 10 weeks indoors once you switch it to a 12/12 light cycle. Outdoors it ripens around October as the days shorten. As a mostly indica plant it tends to finish evenly, so timing the harvest is straightforward, and its photoperiod nature lets you veg it as long as you like beforehand to set its size.
What does Purple Star Killer taste like?
Purple Star Killer has a citrus and fruity lift over a deep, earthy kush base with a woody edge. Myrcene drives the earthy kush body, caryophyllene adds a peppery spice, terpinolene and p-cymene bring the woody notes, and linalool a soft sweetness. A proper three to four week cure really brings that fruity-and-kushy character forward on the inhale.
How much does Purple Star Killer yield?
Purple Star Killer is a strong producer, giving around 500-550 g/m² indoors and an exceptional 1000 g per plant outdoors with full sun, space and a long season. Results depend on light, pot size and canopy health, so train it lightly, feed it steadily, support the heavy branches, and keep an open canopy so the dense lower buds develop fully.
Is Purple Star Killer good for beginners?
Yes. Purple Star Killer is a beginner-friendly strain: it is feminized, so there is no sexing, and its sturdy, indica-dominant structure is forgiving to grow. Its photoperiod nature lets you keep it compact if space is tight, so with a tidy canopy and steady feeding it is an approachable crop, though its very high THC means you should dose the finished buds carefully.
