High THC Seeds

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.

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225 products

Super THC Pack - Automatic Strains

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...

(112)
$49.99 $24.99
+23 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.

(74)
$49.99 $24.99
+23 Extra Gift Points

Bruce Banner 3 (Zamnesia Seeds) Feminized

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. 

(268)
$32.99 $16.49
+14 Extra Gift Points

GG#4 (Zamnesia Seeds) feminized

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.

(370)
$29.99 $14.99
+13 Extra Gift Points

Royal Gorilla (Royal Queen Seeds) feminized

Introducing the Royal Gorilla by Royal Queen Seeds, a powerful hybrid cannabis strain that redefines potency with levels that can reach an incredibly high 27%. This strain, previously exclusive to the US, offers an outstanding experience that is both intense and balanced. Prepare for incredible relaxation paired with a pleasant uplifting feeling!

(127)
$34.50

Banana (Zamnesia Seeds) Feminized

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.

(257)
$29.99 $14.99
+13 Extra Gift Points

Girl Scout Cookies (Zamnesia Seeds) Feminized

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.

(175)
$32.99 $16.49
+14 Extra Gift Points

GG#4 Auto (FastBuds) feminized

GG#4 Auto by FastBuds is a standout autoflower that boasts impressive resin production, very high potency, and a delightful taste. This autoflowering version of the award-winning GG #4 is the perfect choice if you're seeking top-quality buds at harvest, with the added convenience of an autoflower! 

(450)
$38.99

Critical Kush (Barney's Farm) feminized

Critical Kush by Barney's Farm is a very successful cross between Critical Mass, itself a hybrid of Afghani x Skunk #1, and OG Kush, a Northern Californian strain with Chemdawg and Pakistani Kush heritage. This impressive marriage ultimately results in an indica-dominant strain that promotes relaxation, making it a great choice for unwinding and medicinal purposes.

(222)
$47.50

Liberty Haze (Barney's Farm) feminized

High yield, extremely high potency content approaching 25% and a short flowering period of just 8 to 9 weeks - Liberty Haze by Barney's Farm is as close to the ideal strain as it gets. 

(104)
$36.95

Girl Scout Cookies Auto (FastBuds) feminized

Growers in search of top US autoflowering genetics will find their ideal choice in Girl Scout Cookies Auto, a standout hybrid from the West Coast now making waves in Europe. This exceptional hybrid completes its autoflowering cycle in 8-9 weeks and can yield up to 18-23 ounces per square yard, or 2.5-10.5 ounces per plant. Its potency levels reach up to 22%. 

(84)
$38.99

Fat Banana (Royal Queen Seeds) Feminized

Royal Queen Seeds presents the most impressive, substantial, and delectably fruity Kush variant, Fat Banana. This unique strain is so irresistibly delicious that you might find it hard to resist after your initial experience. However, exercise caution and pace yourself with this enticing variety. With a potency of 25%, it's remarkably strong and leads to a prolonged period of relaxation. 

(62)
$32.00

Larry Bird Kush (Zamnesia Seeds) feminized

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.

(78)
$32.99 $16.49
+14 Extra Gift Points

Green Gelato (Royal Queen Seeds) Feminized

Perhaps one of the most flavorful and high-quality Cookies hybrids, Green Gelato by Royal Queen Seeds introduces a new era of premium cannabis. The delicious Thin Mint Cookies and the mouth-watering Sunset Sherbet, arguably the top Cookies genetics from the SF Bay area, merge to create one of the most delightful dessert cannabis strains available for cultivation today. 

(103)
$41.50

HulkBerry (Royal Queen Seeds) Feminized

With a potency surpassing most other strains on Earth, HulkBerry is not here to play around. With roots in the competitive and innovative Colorado breeding scene, HulkBerry provides hybrid vigor in the grow-op and experiences that have been known to impress even the most fastidious canna-connoisseur. 

(82)
$37.00

Gelato (Zamnesia Seeds) feminized

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.

(198)
$29.99 $14.99
+13 Extra Gift Points

Colombian Jack (Kannabia) Feminized

When you're looking for a boost to your creativity and mood, Colombian Jack is your go-to. Elevate your day with this sativa-dominant blend of citrus and incense, meticulously developed by Kannabia. 

(11)
$49.99

Purple Punch (Zamnesia Seeds) feminized

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.

(261)
$24.99 $12.49
+11 Extra Gift Points

Lava Cake (Zamnesia Seeds) feminized

Looking for a unique, boutique strain to add to your garden? Zamnesia's feminized Lava Cake offers exceptional flavors and great cultivation traits that make it easy to grow both indoors and out. Whether you're new to gardening or an experienced cultivator, Lava Cake is a delightful addition to your collection.

(50)
$29.99 $14.99
+13 Extra Gift Points

Frosted Guava (Zamnesia Seeds) feminized

Frosted Guava is a super-resinous treat bred from Guava and Frosted Skywalker. Balancing versatile grow traits with exotic, fruity aromas and a relaxing, clear-headed experience, Frosted Guava is a fine choice for any garden. 

(40)
$29.99 $14.99
+13 Extra Gift Points

Apple Fritter (Zamnesia Seeds) feminized

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.

(156)
$29.99 $14.99
+13 Extra Gift Points

Apple Fritter Automatic (Zamnesia Seeds) feminized

Few autoflowering cannabis varieties 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 favorite autoflowering strains.

(251)
$26.99 $13.49
+13 Extra Gift Points

Runtz x Layer Cake (Barney's Farm) feminized

The team at Barney's Farm has meticulously crafted a blend of Runtz with Layer Cake, resulting in a strain that showcases the best attributes of its heritage, offering a rich, aromatic, and notably potent variety that's sure to captivate anyone who tries it. Easy to grow, Runtz x Layer Cake quickly reaches its peak, leaving nothing but enjoyment to be had. 

(31)
$47.50

Jealousy (Zamnesia Seeds) feminized

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.

(63)
$29.99 $14.99
+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