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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601 products

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.

(5)
£22.10
+26 Extra Gift Points

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.

(16)
£22.10
+26 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.

(33)
£22.10
+26 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.

(8)
£22.10
+26 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.

(3)
£22.10
+26 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.

£22.10
+26 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.

(19)
£22.10
+26 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.

(18)
£22.10
+26 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.

(15)
£22.10
+26 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.

(19)
£22.10
+26 Extra Gift Points

Super Boof (Zamnesia Seeds) feminized

Award-winning: Super Boof (aka Superboof) was Leafly's Strain of the Year in 2024. High potency: Savour 26% THC and aromatic terpenes. Soothing effects: Enjoy a profound buzz that combines mental euphoria with a warm physical sensation. Extra frost: Super Boof produces a thick coat of resin, ideal for hash-making.

(31)
£22.10
+26 Extra Gift Points

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.

(54)
£22.10
+26 Extra Gift Points

Grease Monkey (Zamnesia Seeds) feminized

All-star USA genetics: Grease Monkey stems from a cross of GG#4 and Cookies & Cream. Indica dominance: Expect bushy plants with rock-hard nugs. Top-shelf potency: Grease Monkey boasts 24% THC and skunky, gassy terpenes. Fast-flowering: Grease Monkey takes just 8 weeks to reach maturity indoors.

(19)
£22.10
+26 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.

(47)
£22.10
+26 Extra Gift Points

Slurricane (Zamnesia Seeds) feminized

Top US genetics: Enjoy the original Slurricane, bred from Purple Punch x Do-Si-Dos. Complex terps: Slurricane has sweet and spicy berry aromas/flavours. Compact structure: Plants are stout and discreet. Heavy yields: Slurricane yields up to 450 g/m² indoors and 650 g/plant outside.

(29)
£22.10
+26 Extra Gift Points

Gelonade (Zamnesia Seeds) feminized

Trusted and loved genetics: This hybrid is the lovechild of Gelato and Lemon Tree. Satisfying harvests: Reared in optimal conditions, Gelonade pleases growers with healthy yields. Exciting terpene profile: Refreshing citrus and spicy pepper combine to provide a fruity blend with a kick. Soothing effects: Excellent when you need to loosen up and relax.

(51)
£22.10
+26 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.

(54)
£22.10
+26 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.

(182)
£22.10
+26 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.

(177)
£22.10
+26 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.

(241)
£22.10
+26 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.

(152)
£22.10
+26 Extra Gift Points

Pink Rozay (Zamnesia Seeds) feminized

Raise your glass to Pink Rozay, a US-bred strain that's not afraid to show off! Combining the best of Lemonchello and London Pound Cake, this strain packs a wild THC content, a superb social high, and wine-like aromas that'll have you begging for another glass—or hit, that is.

(204)
£22.10
+26 Extra Gift Points

Wedding Cake Automatic (Zamnesia Seeds) feminized

From the team at Zamnesia Seeds comes Wedding Cake Automatic. This autoflowering strain is not only a joy to grow, but also to smoke—thanks to her impressive flavour profile and abundant high. An easy, breezy specimen in the grow room, she's perfect for beginners looking to get their feet wet, and experienced growers seeking a hassle-free home project.

(417)
£17.85
+22 Extra Gift Points

Runtz (Zamnesia Seeds) feminized

The hype is real, guys! Our breeders managed to bring you something Californians long for—the exquisitely delicious and ultra-potent Runtz. This cross of Gelato and Zkittlez is everything you could ever want from a cannabis strain: tasty, powerful, balanced, productive, and fast-flowering. Get the seeds and experience this phenomenon first-hand!

(830)
£23.81
+28 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