The “Best of the Best” when it comes to THCa content! Strains that are high in THCa, 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 THCa 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 THCa content. Find your favourite High THCa 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 Seeds - Click here for more infoLoud garlic terps: Love it or leave it—GMO Cookies smells like fried garlic, mushrooms, and onions! 28% potency: For a knockout body sensation. Compact indoor growth: Plants reach just 3.3 ft inside. Celebrity US genetics: Get the best of the almighty GSC and Chemdawg.
Award-winning: Super Boof (aka Superboof) was Leafly's Strain of the Year in 2024. High strength: Savor 26% potency 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.
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% potency and skunky, gassy terpenes. Fast-flowering: Grease Monkey takes just 8 weeks to reach maturity indoors.
Juicy, mouthwatering flavors: Savor ripe berries, tropical fruit, and zesty citrus. Top-shelf US genetics: Gelato #41 x Triangle Kush for excellent potency. 25% potency: 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 15 oz/yd² indoors and 25 oz/plant outdoors.
True Cali heritage: Gelonade Autoflower is the perfect example of the best California has to offer. Zesty and refreshing flavors: The perfect blend of peppery and lemony notes. Fast and bountiful: Despite the sativa dominance, the ruderalis influence has gifted Gelonade Autoflower with a quick life cycle. Happy and euphoric: Prepare to smash that to-do list!
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.
By harnessing the same genetic techniques that are used in commercial farming, the Wurlz F1 hybrid Automatic from Zamnesia offers a reliable and uniform growing experience that results in a bevy of buds rich in terpenes. 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.
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.
If you're shopping for a robust indica with a rich flavor profile, Biscotti is an excellent choice. Known for its impressive potency, this variety is a standout in terms of growth and yield. With attentive cultivation, Biscotti seeds are poised to deliver bountiful harvests.
Gone are the days when autos delivered tasteless buds, low robustness levels, and poor harvests. Gelato Autoflower will change any misconceptions you may have about auto seeds. Expect a burst of flavor and impressive strength.
Looking for an auto with great aromas, plenty of potency, and solid American genetics? Then look no further. Zamnesia's Frosted Guava Autoflower delivers exceptional yields, a complex tropical fruit aroma, and a robust potency that's perfect for enthusiasts.
Few autoflowering cannabis varieties deliver the potency, aromas, and excellent grow traits found in Apple Fritter Autoflower. Backed by top-shelf US genetics, this seed is sure to quickly climb your list of favorite autoflowering strains.
Zamnesia's Apple Fritter will enhance your mood, soothe your body, and stimulate your mind. Oh, and did we mention that it has the aroma 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.
From the team at Zamnesia Seeds comes Wedding Cake Autoflower. These cannabis seeds are not only a joy to grow but also offer a delightful experience—thanks to their impressive flavour profile. 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.
Discover the excitement with our latest offering—a cultivar that's been a hit in California. This blend of two renowned varieties is known for its delightful flavor, robustness, and well-rounded characteristics. It's a high-yield, quick-flowering plant that's sure to impress. Experience the sensation yourself with these seeds!
Purple Punch by Zamnesia Seeds is a dreamy variety that shines with an exquisite taste and a soothing presence. Despite her compact stature, this variety is very easy to grow and can deliver impressive yields.
Zamnesia Seeds introduces Gelato, a robust indica-dominant strain that exhibits impressive growth and offers a unique flavor profile. Our version is enhanced with the addition of Wedding Cake genetics, providing a distinctive experience for enthusiasts.
Bruce Banner #3 is known for its strong and invigorating qualities that foster creativity and focus. This robust variety is gaining popularity for its ability to enhance productivity and inspire new levels of innovation.
Girl Scout Cookies is an American hybrid that has become very popular in Europe. This strain features a combination of top Cookie genetics, resulting in a new variety that is both unprecedented and powerful. Its effects are uplifting and can provide relaxation, with potent buds that are ready for harvest in just 8-9 weeks of flowering.
Hardy Haze genetics: Ghost Train Haze descends from a legendary Haze cut bred by Nevil Schoenmakers. Excellent strength: Expect big buds packing 25% potency and delicious terps. Bold aromas: Ghost Train Haze smells of dank, spicy diesel. Heavy yields: Expect harvests of up to 21 oz/plant!
Compact plants: Ghost Train Haze Auto reaches max heights of 4–4.5 ft. Speedy flowering time: Harvest real Haze weed just 12–14 weeks after sprouting your seeds. Top-shelf strength: Ghost Train Haze Auto packs 24% potency and dank diesel terpenes. Excellent yields: Ghost Train Haze Auto yields up to 19.5 oz/yd² indoors or 7 oz/plant outdoors.
Award-winning genetics: Permanent Marker was Leafly's Strain of the Year in 2023. Extreme potency: Enjoy up to 31% potency! 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.
Mouthwatering flavor: 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.
Mouthwatering flavor: 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.
Spectrum of Flavors: Rich, sweet, fruity, and strawberry flavors 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% potency boasting relaxing sensations and uplifting moments.
From the team at Zamnesia Seeds comes Do-Si-Dos F1 Autoflower. Harnessing uniform and reliable F1 genetics, this cultivar is not only incredibly simple and hassle-free to grow but also delivers great-tasting and potent buds. Plants stay close to the ground and provide a dependable cultivation experience that will appeal to all.
Boasting supreme genetics, the Runtz F1 Autoflower seed variety by Zamnesia Seeds is here to enhance your seed cultivation collection. This compact plant offers uniformity, reliability, and, above all, great buds that are teeming with mouth-watering terpenes and robust potency. If you've been looking for a robust autoflower seed that will deliver the goods, Runtz F1 Autoflower could be for you.
Gone are the days when growing autos meant sacrificing potency and aroma. Modern autoflowers are capable of producing excellent buds that easily rival those of photoperiod strains, and this pack is here to prove it. The seeds included here come from select autoflowering genetic lines that produce dense buds dripping with mouth-watering aromas and, most importantly, mind-bending amounts of THC.
Wedding Cake is a treat that can be appreciated for its unique qualities, no matter the occasion! This strain is not only known for its distinctive flavors but is also super easy to grow, with a flowering time of around 65 days. Discover the qualities of Wedding Cake for yourself!
From the scenic heights of the Santa Cruz mountains in California, we introduce Zamnesia’s Banana, a highly potent variety. This hybrid, a combination of OG Kush and Banana, offers a delightful fruity essence. The Banana flavor is enriched with notes of lemon and pepper, providing a smooth and enjoyable taste experience.
Discover the exclusive GG#4, now available at Zamnesia Seeds! This exceptionally robust and flavorful Indica, previously only found in the US, offers a harmonious blend of sensations. Its remarkable strength makes GG#4 a top choice for those seeking therapeutic benefits for various health conditions.
Tantalizing tastes: Enjoy flavors of sourness, berries, and fruit. Epic genetics: The offspring of legendary parents Zkittlez, Gelato, and Runtz. Rapid flowering: Watch your buds burst into maturity in as little as 8 weeks. Mind-blowing power: Prepare for potency levels of up to 24%.
Award-winning genetics: Permanent Marker was Leafly's Strain of the Year in 2023. Express harvest: These auto seeds are harvest-ready in just 9–10 weeks. Heavy buzz: Perfect for unwinding at the end of the day! USA flair: Permanent Marker is originally from California's Seed Junky Genetics.
MAC 1 is a highly sought-after strain originally bred by Capulator and only given out to select breeders and growers. Now, you can grow this beloved strain at home and enjoy dense, dank, and potent buds for yourself! So, what are you waiting for? Order your seeds now!
Celebrate the qualities of Pink Rozay, a US-bred variety that stands out with its unique characteristics! This variety brings together the best of its parentage, offering a robust potency, a delightful social experience, and wine-like aromas that will entice you for more.
Savor the rainbow: Enjoy waves of juicy sweetness. Time-tested genetics: The proud progeny of Pink Guava and Sunset Sherbet. Sky-high strength: Enjoy potency concentrations of 25%. Rewarding harvests: Pull in big yields indoors and out.
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 31.5 oz/plant in outdoor conditions. What's more, her flowers are of unrivaled quality and power—full of resin and skunky aromas enhanced by citrus undertones.
Top US genetics: Enjoy the original Slurricane, bred from Purple Punch x Do-Si-Dos. Complex terps: Slurricane has sweet and spicy berry aromas/flavors. Compact structure: Plants are stout and discreet. Heavy yields: Slurricane yields up to 13 oz/yd² indoors and 23 oz/plant outside.
Decadent flavors: Savor notes of sweet vanilla cake with a spicy, peppery kick. Elite US genetics: Wedding Cake x Kush Mints combine for top-tier potency. 25% potency: For deep relaxation and mood-enhancing euphoria. Monster yields: Up to 18 oz/yd² indoors and 30 oz/plant outdoors. Effortless growth: Hardy, resilient, and packed with dense, frosty buds.
Love fruity flavors, 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.
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 buzz.
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.
If fat, sticky buds with a dank, skunky aroma are your thing, look no further—Fat Bastard Auto is a bulky hybrid bred from a variety of unique strains. Easy to cultivate, potent, and riddled with aromatic terpenes, this strain will impress even the pickiest growers and smokers with the quality and size of its yields. Best of all, Fat Bastard Auto goes from seed to harvest in just 10 weeks.
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% potency: Enjoy a heavy, tingly body buzz ideal for beating tension.
Express harvests: King Louis Autoflower is ready for the picking just 10 weeks after germination. Great potency: Enjoy 24% potency and soothing effects. Delicious terps: Savor fresh aromas and flavors of pine, earth, and wood. Royal genetics: King Louis descends from OG Kush and LA Confidential.
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.
This renowned cultivar by Zamnesia is inspired by Larry Bird, the celebrated Boston Celtics basketball player. The balanced hybrid (50/50), derived from a Sunset Sherbert and a Girl Scout Cookies Thin Mint phenotype, boasts a delightful aroma that is sweet, tangy, and minty.
Complex flavors: Savor 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% potency.
Looking to ease your way into the world of F1 hybrids? This is the perfect way to do so. Hand-picked by our breeders, the F1 hybrids in this pack are super sturdy and extra hardy. Plant them indoors or outdoors, train them, or leave them alone—whatever your growing style, these F1 all-stars will produce an excellent harvest packed with flavor and potency every time. Grow them now!
Royal genetics: King Louis descends from top-shelf Californian strains. Big flavors and aromas: Enjoy a mix of fresh, earthy pine terps. 24% potency: For a heavy-handed buzz. Short stature: Ideal for smaller spaces.
Bananakin Skywalker is sending shockwaves through the Force with its incredible potency (25%) and old-school flavor. This exclusive indica-dominant cultivar, created by the experts at Zamnesia Seeds and DNA Genetics, promises to take your mind and body to a galaxy far, far away. Still, you’ll need to order quickly, as there are only 600 seed packs available (500 EU/100 US).
Permanent Marker will leave a permanent impression on you as soon as you plant her seeds. This uber-potent feminized photoperiod strain is resilient, productive, and ideal for indoor and outdoor cultivation. The resulting buds are glittering with trichomes and offer sweet, candy-like flavors. With potency levels of up to 34%, a strong euphoric high rounds off the experience perfectly.
OG Kush can enhance any genetic pairing, so when our breeders coupled it with the beloved Skywalker, they created a superb hybrid indeed—Skywalker OG. This plant contains indica-dominant genetics, with a 70% indica and 30% sativa breakdown. At 24% THC, it's all about potent effects, soothing and relaxing the body while uplifting the mood. And don't sleep on her earthy, spicy flavor either!
Khalifa Kush is a potent 80% Indica feminized strain by Blimburn Seeds, delivering calming effects and citrus-pine flavor. With potency levels around 26–30%, it’s a favorite among experienced growers seeking dense, resin-rich buds and structured plants ideal for evening use.
Sweet and super fruity: Passion Fruitz is packed with delicious tropical citrus terps. Timeless genetics: Descends from the almighty OG Kush. Tall plants with XL yields: Ideal for larger spaces. Potent but balanced effects: With 24% potency, Passion Fruitz relaxes both the body and mind after a single toke.
Meet Blackberry Moonrocks, the lovechild of Blue Moonrocks and Blackberry Kush, straight from the extensive catalog of Blimburn Seeds. This indica-dominant plant delivers interesting berry and lavender flavors alongside uplifting effects. It will suit moderately experienced growers looking for a rewarding growing project.
If you love sativas, Scrambler Haze by Blimburn Seeds is bound to impress with its high potency, strong euphoria, and mouthwatering flavors. And did we mention that she's a breeze to cultivate too? Indoors or outdoors, in soil or in hydroponics, Scrambler Haze makes a fantastic addition to any setup and delivers heavy yields in as little as 10 weeks!
Rich flavors: A decadent mix of vanilla, sweet berries, and diesel. Potent & balanced: 21% potency delivers focus, creativity, and full-body relaxation. Heavy yields: Up to 21 oz/plant outdoors and 15 oz/yd² indoors. Stunning buds: Resinous nugs with vibrant green, blue, and purple hues. Quick turnaround: Harvest potent buds in just 9–10 weeks of bloom.
Indica dominant: A three-way cross of Kush Mints, F1 Durb, and Gushers resulted in a 70% indica-dominant profile. Superb producer: Plants are highly vigorous and deliver exceptional yields. Cool as a cucumber: With aromas of menthol and sugar, Gush Mintz offers an unusual blend of terpenes. Soothing effects: THC levels of 24% ensure a strong, relaxing experience.
Jealousy, a superb creation from Zamnesia, quickly became popular and was named Leafly Strain of the Year 2022. It's got plenty to love, including famous parentage, good potency, excellent yield potential, and complex aromas and flavors. This slightly indica-dominant cannabis seed variety encourages a sense of calm and contentment, ideal for a relaxing evening.
Dank fuel aromas: Motorbreath Autoflower's strong fuel terps will leave your house smelling like a mechanic's shop. Great potency: Expect to harvest frosty buds packing 24% potency and a heavy, relaxing experience. Speedy harvests: Motorbreath Auto goes from seed to harvest in just 12 weeks. Stellar genetics: A direct descendant of the almighty Chemdawg.
Beloved US genetics: Motorbreath stems from the legendary Chemdawg and SFV OG. Top-shelf potency: Harvest buds with up to 26% potency and bold diesel aromas. Strong effects: Motorbreath is ideal for cannabis users seeking a heavy-hitting experience. Easy growth traits: Expect compact, resilient, and high-yielding plants.
What do you get when you cross GSC and Original Glue? Glookies, of course. Add a touch of ruderalis to the mix and voilà—you've got Glookies Auto, an autoflowering indica-dominant hybrid packing the best traits of two of the most important cannabis strains of modern times. Need we say more? Order your seeds here now.
Glookies by Blimburn Seeds is an easy-to-grow, high-yielding indica hybrid derived from Gorilla Glue and Thin Mint Girl Scout Cookies. Ideal for newcomers and experts alike, this resilient strain thrives in basically any environment and offers a low-maintenance option for home growers. The resulting buds are teeming with potency alongside citrus and diesel flavors.
Experience the ultimate rush with Stoned Panda, a potent strain boasting up to 32% potency! Delivering massive yields both indoors and out, it's effortless to grow and offers delightful earthy, sweet, and fruity flavors alongside euphoric effects.
The creation of GG marks a significant date in cannabis' historical timeline. Descending from the mighty Chem and Diesel genetic lines, GG#4 by Blimburn Seeds offers excellent potency and unbeatable resin production. Grow this modern classic at home now and experience everything that made Original Glue so spectacular.
If you cherish a heavy, soothing buzz, Granddaddy Purple by Blimburn Seeds is bound to be your new go-to strain. Created in honor of the almighty GDP discovered by Ken Estes, Granddaddy Purple by Blimburn produces dense, crystal-coated purple buds boasting rich berry aromas and a deeply relaxing effect. What are you waiting for? Order your seeds here and add some indica royalty to your garden.
Blue Dream is an iconic hybrid stemming from a masterful cross of Blueberry and Haze. Originally created by DJ Short, the expert breeders at Blimburn Seeds have released their own version of this beloved classic, featuring bold berry aromas, up to 24% potency, and excellent growth traits. Grow this fantastic reiteration of Blue Dream at home now.
Love gassy terpenes and big, potent hits? This is the strain for you! Created in California in the 1990s, Sour Diesel is a classic hybrid beloved by smokers for its pungent aroma and strong, uplifting buzz. Now, growing your own Sour D at home is even simpler with these hardy, reliable seeds from Blimburn.
Embrace your citrusy side with this limited-edition collaboration between the prestigious seed bank Blimburn Seeds and Zamnesia Seeds. Harnessing the stimulating characteristics of parent strains Hippo High and Tangerine Dream, Orange Hippo promises to overload your senses with an explosion of citrus fruits. But be quick! Only 500 packs available in the EU and 100 packs in the US!
Every weed grower deserves to have a prime cut of Glue in their garden. If you've reached the Bear rank of the Zamnesia TRIBE, your time has come. Order Grizzly Glue, an exclusive GG#4 cross, today, and be among the few privileged gardeners blessed with the opportunity to grow this unique cultivar, which boasts that iconic Glue stank and a heavy buzz to match.
Got gift points to spend? Cash them in for this exclusive sativa goddess. Hyper Vyper by Zamnesia Seeds boasts big-name genetics, towering sativa growth traits, and heavyweight yields to match. Best of all, Hyper Vyper delivers delicious aromas and flavors as well as uplifting mental euphoria ideal for creatives. But proceed with caution; this heavyweight specimen packs up to 26% potency!

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.
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.
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.
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: