High THC Strains

The “Best of the Best” when it comes to THC content! Strains that are high in THC, the psychoactive compound contained in cannabis, can deliver the most potent smoke for the ultimate in relaxation or powerful uplifting euphoria. Some cannabis strains with a particular high THC content can even make for outright psychedelic experiences!

But high THC content doesn’t just mean that these cannabis varieties can be optimal for recreational users who seek the ultimate for chilling and relaxation. These strains rich in THC can also be a good choice for those users who need very potent medicine that can help with pain relief and other medical conditions.

The High THC strains category here in the Zamnesia web shop features these select strains that are known for their particular high THC content. Find your favourite High THC strain in no time here at Zamnesia!

Feeling overwhelmed by all the different cannabis strains out there? Use the Cannabis Seedfinder and find the strain that best suits your growing needs in 6 simple steps.

High THC Strains - Click here for more info
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606 products

Lemon Cherry Gelato (Zamnesia Seeds) feminized

Mouthwatering flavour: A delightful mix of fruity, pine, sour, sweet, tropical, and woody notes. Premium genetics: A cross of Sunset Sherbet × Girl Scout Cookies. Resilient & compact: Medium-sized plants suitable for various growing environments. Balanced effects: Promotes relaxation while enhancing focus and creativity.

(1)
£22.22
+13 Extra Gift Points

Gushers (Zamnesia Seeds) feminized

Juicy, mouthwatering flavours: Savour ripe berries, tropical fruit, and zesty citrus. Top-shelf US genetics: Gelato #41 x Triangle Kush for excellent potency. 25% THC: Enjoy a euphoric cerebral rush followed by deep, body-melting relaxation. Heavy-hitting but balanced: Perfect for unwinding, intimacy, or tension relief. XL yields: Up to 500 g/m² indoors and 700 g/plant outdoors.

(1)
£22.22
+13 Extra Gift Points

Lemon Cherry Gelato Automatic (Zamnesia Seeds) feminized

Mouthwatering flavour: A delightful mix of fruity, pine, sour, sweet, tropical, and woody notes. Autoflowering excellence: Sunset Sherbet × Girl Scout Cookies × ruderalis for fast-growing, resilient plants. Compact & versatile: Ideal for indoor and outdoor setups with manageable heights. Balanced effects: Promotes relaxation while enhancing focus and creativity.

£22.22 £16.66
+13 Extra Gift Points

Dutch Treat (Zamnesia Seeds) Feminized

Complex aromas: A delightful mix of fruity, orange, and sweet terps. Classic genetics: A hybrid of Northern Light x Haze x Skunk#1. Compact growth: A small, balanced strain that will produce a good harvest with proper care. Uplifting effects: Enjoy mental clarity and a mellowing physical effect.

£22.22
+13 Extra Gift Points

Wedding Crasher (Zamnesia Seeds) feminized

Rich flavours: A decadent mix of vanilla, sweet berries, and diesel. Potent & balanced: 21% THC delivers focus, creativity, and full-body relaxation. Heavy yields: Up to 600 g/plant outdoors and 500 g/m² indoors. Stunning buds: Resinous nugs with vibrant green, blue, and purple hues. Quick turnaround: Harvest potent buds in just 9–10 weeks of bloom.

£22.22
+13 Extra Gift Points

LA Kush Cake (Zamnesia Seeds) feminized

Decadent flavours: Savour notes of sweet vanilla cake with a spicy, peppery kick. Elite US genetics: Wedding Cake x Kush Mints combine for top-tier potency. 25% THC: For deep relaxation and mood-enhancing euphoria. Monster yields: Up to 600 g/m² indoors and 850 g/plant outdoors. Effortless growth: Hardy, resilient, and packed with dense, frosty buds.

£22.22
+13 Extra Gift Points

King Louis (Zamnesia Seeds) feminized

Royal genetics: King Louis descends from top-shelf Californian strains. Big flavours and aromas: Enjoy a mix of fresh, earthy pine terps. 24% THC: For a heavy-handed stone. Short stature: Ideal for smaller spaces.

(11)
£22.22
+13 Extra Gift Points

White Runtz (Zamnesia Seeds) feminized

Super sweet: The Runtz line is loved for its bold candy aromas. Top-shelf Cali genetics: White Runtz was born and bred in the San Francisco Bay Area. Excellent resin production: Harvest big, dense, snow-white flowers. 24% THC: Enjoy a heavy, tingly body high ideal for beating tension.

(9)
£22.22
+13 Extra Gift Points

King Louis Automatic (Zamnesia Seeds) feminized

Express harvests: King Louis Automatic is ready for the picking just 10 weeks after germination. Great potency: Enjoy 24% THC and soothing effects. Delicious terps: Savour fresh aromas and flavours of pine, earth, and wood. Royal genetics: King Louis descends from OG Kush and LA Confidential.

(8)
£22.22 £16.66
+13 Extra Gift Points

White Truffle (Zamnesia Seeds) feminized

Complex flavours: Savour delicious notes of sweet autumn fruits and nuts. Full-body effects: Enjoy an initial cerebral hit that gradually soothes the entire body. Connoisseur genetics: White Truffle is a unique variety of Gorilla Butter. Plenty of potency: White Truffle buds pack up to 25% THC.

(12)
£22.22
+13 Extra Gift Points

Blackberry Moonstones Auto (Blimburn Seeds) feminized

Love fruity flavours, uplifting effects, and top-shelf potency? Look no further—Blackberry Moonstones Auto by Blimburn Seeds delivers all of this and more in a fast, compact auto seed. In just 8–10 weeks, this budding hybrid will reward you with heavy harvests of rock-hard, frosty purple flowers that smell, taste, and smoke amazingly.

(15)
£33.35 £25.01

Fat Bastard (Blimburn Seeds) feminized

If you're looking for a strain that will really deliver come harvest time, make space for Blimburn Seeds' Fat Bastard. This variety has the potential to pump out up to a whopping 900 g/plant in outdoor conditions. What's more, flowers are of unrivalled quality and power—full of resin and skunky aromas enhanced by citrus undertones.

(13)
£33.35

Permanent Marker (Zamnesia Seeds) feminized

Award-winning genetics: Permanent Marker was Leafly's Strain of the Year in 2023. Extreme potency: Enjoy up to 31% THC! High-profile origins: Permanent Marker was originally created by JBeezy at Seed Junky Genetics. Dank aromas: Enjoy lingering floral fumes with notes of soap and gas.

(22)
£22.22
+13 Extra Gift Points

Rainbow Sherbet Automatic (Zamnesia Seeds) feminized

Spectrum of Flavours: Rich, sweet, fruity, and strawberry flavours fill the senses. Impressive Lineage: Bred from Pink Guava, Sunset Sherbet and Ruderalis. Effortless Cultivation: Easygoing growing experience. Perfect for all budding cultivators. Soothing Effects: 24% THC boasting relaxing sensations and uplifting moments.

(102)
£22.22 £16.66
+13 Extra Gift Points

Rainbow Sherbet (Zamnesia Seeds) feminized

Savour the rainbow: Enjoy waves of juicy sweetness. Time-tested genetics: The proud progeny of Pink Guava and Sunset Sherbet. Sky-high potency: Enjoy THC concentrations of 25%. Rewarding harvests: Pull in big yields indoors and out.

(39)
£22.22
+13 Extra Gift Points

Tangerine Dream (Zamnesia Seeds) feminized

When legends cross, they create legendary outcomes. Or at least that was the case when our breeders created Tangerine Dream from a select variety of classic strains. Boasting sweet citrus aromas and flavors, hardy grow traits, and a happy, uplifting high, there's little not to love about Tangerine Dream by Zamnesia Seeds. But don't take our word for it—order your seeds now and find out yourself.

(52)
£22.22
+13 Extra Gift Points

Alien OG (Zamnesia Seeds) feminized

Alien OG combines genetics from Tahoe OG and Alien Kush. Born and bred in San Francisco, this Cali classic boasts a delicious pine and citrus aroma, versatile grow traits, and a potent, trippy cerebral buzz.

(46)
£22.22
+13 Extra Gift Points

Wurlz F1 Automatic (Zamnesia Seeds) feminized

By harnessing the same genetic techniques that are used in commercial farming, Wurlz F1 hybrid Automatic from Zamnesia offers a reliable and uniform growing experience that results in a bevy of buds teeming with terpenes and THC. Taking just 9–10 weeks from seed to harvest, this is a fast-growing cultivar that rewards growers with sweet, fruity nugs that showcase deeply soothing sensations.

(325)
£29.92 £22.44
+18 Extra Gift Points

Super THC Pack - Feminized Strains

Picture heavy colas of bulging calyxes dripping with delicious resin. That's what you can expect from these hard-hitting THC monsters. Be warned—these strains aren't for the faint-hearted. Packing extremely high THC levels and plenty of terpenes, the strains in our Super THC Pack are ideal for veteran smokers or anyone looking for knockout, pseudo-psychedelic effects.

(58)
£38.47
+23 Extra Gift Points

Biscotti (Zamnesia Seeds) feminized

If you're shopping for a powerful indica that's packed full of flavour, look no further than Biscotti. Containing up to a whopping 25% THC and producing pronounced effects, this flavoursome lady is no slouch in the grow room either. With a little care, those who sow Biscotti seeds can count on excellent results come harvest time.

(161)
£22.22
+13 Extra Gift Points

Gelato Automatic (Zamnesia Seeds) feminized

Gone are the days when autos delivered tasteless buds, low THC levels, and poor harvests. Gelato Automatic will destroy any prejudices you may have against auto seeds for good. Massive flavour and potency are coming your way—and soon.

(141)
£22.22 £16.66
+13 Extra Gift Points

Frosted Guava Automatic (Zamnesia Seeds) feminized

Looking for an auto with great aromas, plenty of potency, and solid American genetics? Then look no further. Zamnesia's Frosted Guava Automatic delivers exceptional yields, a complex tropical fruit aroma, 25% THC, and an uplifting, stimulating high that's perfect for every day.

(166)
£22.22 £16.66
+13 Extra Gift Points

Apple Fritter Automatic (Zamnesia Seeds) feminized

Few auto strains deliver the potency, aromas, and excellent grow traits found in Apple Fritter Automatic. Backed by top-shelf US genetics, this seed is sure to quickly climb your list of favourite autoflowering strains.

(227)
£22.22 £16.66
+13 Extra Gift Points

Apple Fritter (Zamnesia Seeds) feminized

Zamnesia's Apple Fritter will boost your mood, relax your body, and kick-start your mind. Oh, and did we mention that it smells of warm, homemade apple pastries? If you're looking for a potent, high-yielding strain with solid US genetics, make some room in your grow for Apple Fritter.

(141)
£22.22
+13 Extra Gift Points

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A guide to high-THC strains

A guide to high-THC strains

Are you looking to purchase cannabis seeds with extreme THC levels? Well, you’re about to discover some of the best strains to suit your desires. However, before we introduce you to our superstar weed varieties, we think you’ll find this brief guide helpful for your cultivation endeavours. Below, find out the key benefits of growing strains loaded with THC, and how to raise them.

Benefits of strains with a high THC content

Why do growers choose to cultivate high-THC strains in the first place? Well, part of the answer is quite obvious: they contain more THC! Higher quantities of the psychoactive cannabinoid means it takes less plant material to experience equally potent effects. With weaker varieties, many experienced smokers might need a whole joint to feel suitably high, whereas with a high-THC strain, a single bong hit might suffice. Overall, a stash of high-THC flowers lasts longer. Those with a particularly high tolerance can also use them to make extremely powerful edibles and extracts to really scratch their itch.

Growing cannabis with higher THC levels

You might think that growing high-THC cannabis takes some kind of special approach—but you’d be mistaken. You can grow these plants in the same way as other varieties. Strains high in THC are innately “wired” to churn out much higher quantities of the cannabinoid. However, this doesn’t mean you can get away with taking shortcuts. Ultra-potent plants still depend on powerful lights, high-quality organic nutrients, and a mindful watering schedule to express their full genetic potential.

Buy the best high-THC genetics available

Do you want to use less of your stash every time you get high? Or maybe your favourite strains aren’t hitting like they used to? Well, what are you waiting for? High-THC strains from Zamnesia will take your experience to another level, without demanding any more work in the grow room or garden. To get you started on your journey, here are some of the strongest varieties you can get your hands on:

  • Bruce Banner 3: Brace yourself for THC levels of 27% and monster yields
  • Gorilla Glue: This beast contains 26% THC and fruity and earthy terpenes
  • Banana: Experience tropical vibes and THC levels of 28%
  • Larry Bird Kush: With a THC content of 26%, this strain will have you giggling
  • Wedding Cake Automatic: Prepare to enjoy 24% THC after a rapid growing cycle