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High-THC Seeds

Our high-THC cannabis seeds are carefully selected for their potency and quality. If you're looking to buy potent weed genetics, then you're in the right place. At Azarius, we offer the best high-THC marijuana seeds with discreet shipping and a satisfaction guarantee. For growers who love potency, there are no better options than our high-THC weed seeds. Buy yours from Azarius today.

11 products

11 products

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Seeds: 1 £ 6,59 Seeds: 3 £ 18,04 Seeds: 5 £ 25,68 Seeds: 10 £ 43,03

GG4 Auto | Cannabis Seeds by Azarius

GG4 Auto

New

☆☆☆☆☆ ★★★★★

(4)

GG4 Auto

£18,04

GG4 Auto | Cannabis Seeds by Azarius

GG4 Auto

New

GG4 Auto

£18,04

GG4 Auto | Cannabis Seeds by Azarius

GG4 Auto

New

GG4 Auto

Autoflowering seeds

Gorilla Glue #4 Autoflower is a mostly sativa hybrid with fruity, piney flavours and a euphoric high powered by 18–24% THC. It is efficient to grow, is harvest-ready in 8–10 weeks, and thrives indoors or outdoors. Genetics: Gorilla Glue #4 x Ruderalis <td...

£18,04

GG4 Auto | Cannabis Seeds by Azarius

GG4 Auto

New

GG4 Auto

Autoflowering seeds

Gorilla Glue #4 Autoflower is a mostly sativa hybrid with fruity, piney flavours and a euphoric high powered by 18–24% THC. It is efficient to grow, is harvest-ready in 8–10 weeks, and thrives indoors or outdoors. Genetics: Gorilla Glue #4 x Ruderalis <td...

£18,04

Seeds: 1 £ 6,59 Seeds: 3 £ 18,04 Seeds: 5 £ 25,68 Seeds: 10 £ 43,03

Granddaddy Purple | Cannabis Seeds by Azarius

Granddaddy Purple

New

☆☆☆☆☆ ★★★★★

(4)

Granddaddy Purple

£18,04

Granddaddy Purple | Cannabis Seeds by Azarius

Granddaddy Purple

New

Granddaddy Purple

£18,04

Granddaddy Purple | Cannabis Seeds by Azarius

Granddaddy Purple

New

Granddaddy Purple

Feminized seeds

Granddaddy Purple is a high-THC, mostly indica hybrid with berry and fruity flavours, ideal for evening relaxation. Recognised for its resinous, deep purple buds, it has a flowering time of 8–10 weeks. Suitable for indoor and outdoor cultivation, it thrives with proper care and optimal conditions. ...

£18,04

Granddaddy Purple | Cannabis Seeds by Azarius

Granddaddy Purple

New

Granddaddy Purple

Feminized seeds

Granddaddy Purple is a high-THC, mostly indica hybrid with berry and fruity flavours, ideal for evening relaxation. Recognised for its resinous, deep purple buds, it has a flowering time of 8–10 weeks. Suitable for indoor and outdoor cultivation, it thrives with proper care and optimal conditions. ...

£18,04

Seeds: 1 £ 10,06 Seeds: 3 £ 18,04 Seeds: 5 £ 29,15 Seeds: 10 £ 46,51

Wedding Cake Auto | Cannabis Seeds by Azarius

Wedding Cake Auto

New

☆☆☆☆☆ ★★★★★

(6)

Wedding Cake Auto

£18,04

Wedding Cake Auto | Cannabis Seeds by Azarius

Wedding Cake Auto

New

Wedding Cake Auto

£18,04

Wedding Cake Auto | Cannabis Seeds by Azarius

Wedding Cake Auto

New

Wedding Cake Auto

Autoflowering seeds

Wedding Cake Auto, a potent, mostly indica hybrid from Wedding Cake x Girl Scout Cookies Auto, offers a powerful, balanced, relaxing, and cerebral experience. With sweet, fruity, woody flavours and 20–25% THC levels, it thrives indoors and outdoors, yielding impressive results. Ideal for both seasoned and novice growers. <td...

£18,04

Wedding Cake Auto | Cannabis Seeds by Azarius

Wedding Cake Auto

New

Wedding Cake Auto

Autoflowering seeds

Wedding Cake Auto, a potent, mostly indica hybrid from Wedding Cake x Girl Scout Cookies Auto, offers a powerful, balanced, relaxing, and cerebral experience. With sweet, fruity, woody flavours and 20–25% THC levels, it thrives indoors and outdoors, yielding impressive results. Ideal for both seasoned and novice growers. <td...

£18,04

Seeds: 1 £ 7,28 Seeds: 3 £ 19,43 Seeds: 5 £ 29,84 Seeds: 10 £ 49,98

Runtz | Cannabis Seeds by Azarius

Runtz

New

☆☆☆☆☆ ★★★★★

(5)

Runtz

£19,43

Runtz | Cannabis Seeds by Azarius

Runtz

New

Runtz

£19,43

Runtz | Cannabis Seeds by Azarius

Runtz

New

Runtz

Feminized seeds

Runtz is a mostly sativa hybrid strain resulting from Gelato x Zkittlez. It offers a citrus, earthy, and sweet flavour profile. With a THC content of 19–22%, it delivers a happy, energising high. Ideal for creativity, it's perfect for both indoor and outdoor cultivation. Genetics:...

£19,43

Runtz | Cannabis Seeds by Azarius

Runtz

New

Runtz

Feminized seeds

Runtz is a mostly sativa hybrid strain resulting from Gelato x Zkittlez. It offers a citrus, earthy, and sweet flavour profile. With a THC content of 19–22%, it delivers a happy, energising high. Ideal for creativity, it's perfect for both indoor and outdoor cultivation. Genetics:...

£19,43

Seeds: 1 £ 7,28 Seeds: 3 £ 19,43 Seeds: 5 £ 29,84 Seeds: 10 £ 49,98

Runtz Auto | Cannabis Seeds by Azarius

Runtz Auto

New

☆☆☆☆☆ ★★★★★

(5)

Runtz Auto

£19,43

Runtz Auto | Cannabis Seeds by Azarius

Runtz Auto

New

Runtz Auto

£19,43

Runtz Auto | Cannabis Seeds by Azarius

Runtz Auto

New

Runtz Auto

Autoflowering seeds

Runtz Autoflower is an indica-dominant hybrid with a swift 8–10 week life cycle. It offers caramel, fruity, and herbal flavours with medium THC levels (18–22%). Known for its relaxing body high and soothing sensations, it's ideal after a long day at work. Accessible for both novice and experienced growers. <td...

£19,43

Runtz Auto | Cannabis Seeds by Azarius

Runtz Auto

New

Runtz Auto

Autoflowering seeds

Runtz Autoflower is an indica-dominant hybrid with a swift 8–10 week life cycle. It offers caramel, fruity, and herbal flavours with medium THC levels (18–22%). Known for its relaxing body high and soothing sensations, it's ideal after a long day at work. Accessible for both novice and experienced growers. <td...

£19,43

Seeds: 1 £ 7,28 Seeds: 3 £ 19,43 Seeds: 5 £ 29,84 Seeds: 10 £ 49,98

Girl Scout Cookies Auto | Cannabis Seeds by Azarius

Girl Scout Cookies Auto

New

☆☆☆☆☆ ★★★★★

(4)

Girl Scout Cookies Auto

£19,43

Girl Scout Cookies Auto | Cannabis Seeds by Azarius

Girl Scout Cookies Auto

New

Girl Scout Cookies Auto

£19,43

Girl Scout Cookies Auto | Cannabis Seeds by Azarius

Girl Scout Cookies Auto

New

Girl Scout Cookies Auto

Autoflowering seeds

Girl Scout Cookies Auto is a sativa-dominant hybrid combining Girl Scout Cookies and ruderalis. It offers a sweet, earthy flavour, a euphoric high, and 20–22% THC. Ideal for daytime use, it's simple to cultivate and is harvest-ready in 8–10 weeks, with high yield potential. Genetics:...

£19,43

Girl Scout Cookies Auto | Cannabis Seeds by Azarius

Girl Scout Cookies Auto

New

Girl Scout Cookies Auto

Autoflowering seeds

Girl Scout Cookies Auto is a sativa-dominant hybrid combining Girl Scout Cookies and ruderalis. It offers a sweet, earthy flavour, a euphoric high, and 20–22% THC. Ideal for daytime use, it's simple to cultivate and is harvest-ready in 8–10 weeks, with high yield potential. Genetics:...

£19,43

Seeds: 1 £ 6,59 Seeds: 3 £ 18,04 Seeds: 5 £ 25,68 Seeds: 10 £ 43,03

Apple Fritter Auto | Cannabis Seeds by Azarius

Apple Fritter Auto

New

☆☆☆☆☆ ★★★★★

(6)

Apple Fritter Auto

£18,04

Apple Fritter Auto | Cannabis Seeds by Azarius

Apple Fritter Auto

New

Apple Fritter Auto

£18,04

Apple Fritter Auto | Cannabis Seeds by Azarius

Apple Fritter Auto

New

Apple Fritter Auto

Autoflowering seeds

Apple Fritter Autoflower, an indica-dominant hybrid from Sour Apple Auto x Animal Cookie, boasts high THC (22–25%) and flavours of earth, fruit, and sweetness flavours. It offers relaxing and euphoric effects, ideal for quiet evenings and lazy weekends. It's a resilient, compact plant that is harvest-ready in 8–10 weeks. <td...

£18,04

Apple Fritter Auto | Cannabis Seeds by Azarius

Apple Fritter Auto

New

Apple Fritter Auto

Autoflowering seeds

Apple Fritter Autoflower, an indica-dominant hybrid from Sour Apple Auto x Animal Cookie, boasts high THC (22–25%) and flavours of earth, fruit, and sweetness flavours. It offers relaxing and euphoric effects, ideal for quiet evenings and lazy weekends. It's a resilient, compact plant that is harvest-ready in 8–10 weeks. <td...

£18,04

Seeds: 1 £ 5,89 Seeds: 3 £ 14,57 Seeds: 5 £ 22,21 Seeds: 10 £ 36,09

Blue Dream - Cannabis Seeds by Azarius Seeds

Blue Dream

New

☆☆☆☆☆ ★★★★★

(4)

Blue Dream

£14,57

Blue Dream - Cannabis Seeds by Azarius Seeds

Blue Dream

New

Blue Dream

£14,57

Blue Dream - Cannabis Seeds by Azarius Seeds

Blue Dream

New

Blue Dream

Feminized seeds

Blue Dream, a balanced hybrid with origins in California, offers sweet berry bliss with an uplifting, hazy high and divine fruity flavours. Suitable for indoor/outdoor growth, it flowers in 8–10 weeks and yields up to 700g/plant. Genetics: Blueberry x Haze <td...

£14,57

Blue Dream - Cannabis Seeds by Azarius Seeds

Blue Dream

New

Blue Dream

Feminized seeds

Blue Dream, a balanced hybrid with origins in California, offers sweet berry bliss with an uplifting, hazy high and divine fruity flavours. Suitable for indoor/outdoor growth, it flowers in 8–10 weeks and yields up to 700g/plant. Genetics: Blueberry x Haze <td...

£14,57

Seeds: 1 £ 6,59 Seeds: 3 £ 18,04 Seeds: 5 £ 25,68 Seeds: 10 £ 43,03

Cereal Milk - Cannabis Seeds by Azarius Seeds

Cereal Milk

New

☆☆☆☆☆ ★★★★★

(4)

Cereal Milk

£18,04

Cereal Milk - Cannabis Seeds by Azarius Seeds

Cereal Milk

New

Cereal Milk

£18,04

Cereal Milk - Cannabis Seeds by Azarius Seeds

Cereal Milk

New

Cereal Milk

Feminized seeds

With a name like Cereal Milk, you know this strain’s got great flavour. Not only that, but this 50/50 indica/sativa hybrid delivers a balanced, uplifting effect that’s suitable for all sorts of occasions. As the cherry on top, those who grow Cereal Milk cannabis seeds from Azarius will be met with vigorous, abundant, and resinous plants. ...

£18,04

Cereal Milk - Cannabis Seeds by Azarius Seeds

Cereal Milk

New

Cereal Milk

Feminized seeds

With a name like Cereal Milk, you know this strain’s got great flavour. Not only that, but this 50/50 indica/sativa hybrid delivers a balanced, uplifting effect that’s suitable for all sorts of occasions. As the cherry on top, those who grow Cereal Milk cannabis seeds from Azarius will be met with vigorous, abundant, and resinous plants. ...

£18,04

Seeds: 1 £ 6,59 Seeds: 3 £ 18,04 Seeds: 5 £ 25,68 Seeds: 10 £ 43,03

Super Boof

Super Boof

New

☆☆☆☆☆ ★★★★★

(9)

Super Boof

£18,04

Super Boof

Super Boof

New

Super Boof

£18,04

Super Boof

Super Boof

New

Super Boof

Feminized seeds

Loud, bold, and bursting with flavor. Born from Black Cherry Punch and Tropicana Cookies, Super Boof’s balanced hybrid hits with fruity funk, earthy spice, and a euphoric lift that keeps the good times rolling. A strain that looks wild and feels wilder. Genetics: Black Cherry Punch...

£18,04

Super Boof

Super Boof

New

Super Boof

Feminized seeds

Loud, bold, and bursting with flavor. Born from Black Cherry Punch and Tropicana Cookies, Super Boof’s balanced hybrid hits with fruity funk, earthy spice, and a euphoric lift that keeps the good times rolling. A strain that looks wild and feels wilder. Genetics: Black Cherry Punch...

£18,04

Seeds: 1 £ 6,59 Seeds: 3 £ 18,04 Seeds: 5 £ 25,68 Seeds: 10 £ 43,03

Ghost Train Haze

Ghost Train Haze

New

☆☆☆☆☆ ★★★★★

(6)

Ghost Train Haze

£18,04

Ghost Train Haze

Ghost Train Haze

New

Ghost Train Haze

£18,04

Ghost Train Haze

Ghost Train Haze

New

Ghost Train Haze

Feminized seeds

An unstoppable rush. Ghost Train Haze swooshes through your mind like a runaway locomotive—bright, intense, and impossible to stop. With citrus-fuelled terpenes and a heady sativa lift, this Ghost OG x Neville’s Wreck hybrid hits fast, hits hard, and doesn’t let up. You’re not just getting high—you’re on a one-way trip. ...

£18,04

Ghost Train Haze

Ghost Train Haze

New

Ghost Train Haze

Feminized seeds

An unstoppable rush. Ghost Train Haze swooshes through your mind like a runaway locomotive—bright, intense, and impossible to stop. With citrus-fuelled terpenes and a heady sativa lift, this Ghost OG x Neville’s Wreck hybrid hits fast, hits hard, and doesn’t let up. You’re not just getting high—you’re on a one-way trip. ...

£18,04

Why Grow High-THC Seeds?

High-THC weed strains from the Azarius seed bank are some of the most potent genetics you can get your hands on. You'll want to buy strains with a high THC content if you're after a long-lasting and powerful experience. Growers and smokers value these genetics for several reasons, such as having developed a high tolerance to THC or simply because they prefer hard-hitting and longer-lasting psychoactive effects.

What Is THC and How Does It Work?

THC underpins the potency of cannabis. This molecule occurs in the trichomes of weed flowers in varying concentrations depending on genetic and environmental factors. When smoked, vaped, or eaten, THC enters the brain, where it triggers the release of the feel-good molecule dopamine, resulting in a euphoric effect. Investing in high-THC weed seeds means you'll get more of this cannabinoid with every inhalation.

What Is Considered High THC?

Cannabis users often ask questions such as "What percentage of THC is enough?" and "Is 20% THC a lot?". In truth, THC affects people differently based on factors such as tolerance and genetics. However, quantities of 25–30% are generally recognised as a high THC level.

How to Choose a High-THC Cannabis Strain

When buying high-THC marijuana seeds from our seed bank, you'll want to take some time to look at each strain's unique traits. Aside from the THC level (which will determine potency), check out the terpenes in each variety to get an idea of the flavours and effects they provide. You'll also want to consider the size of each plant and how much of a harvest you can expect to receive.

Are High-THC Feminized Photoperiod Seeds Stronger Than Autoflower Seeds?

Traditionally, most growers opted for feminized photoperiod strains when looking to buy cannabis seeds with high levels of THC. However, breeders have worked hard over the years to raise concentrations in auto strains. F1 hybrid autos, for example, offer huge levels of the cannabinoid. When looking to buy plants with the highest THC concentrations, you should definitely consider autoflowering genetics!

Are Indica Genetics More Potent Than Sativa?

Should you opt for sativa or indica strains when purchasing high-THC marijuana seeds? While these labels help to describe the potential size and appearance of a cannabis strain, they do little to describe its flavour or effects. Instead, you should focus solely on the THC and terpene content of a strain to determine its power.

Does Skunk, Gelato, or Gorilla Genetics Contain the Most THC?

Skunk, Gelato, and Gorilla genetics are all famous for their high concentrations of THC. While they'll all scratch that psychoactive itch, Gorilla strains offer some of the highest THC values available.

How Do You Increase THC Before Harvesting?

All high-THC weed seeds are capable of churning out huge levels of the cannabinoid, but you need to help them along the way. Provide strong lighting, the right nutrients, and the proper quantities of water during the growing cycle to produce some truly potent cannabis.

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