High THC Seeds

Discover the powerful impact of our high THC seeds, designed for those who crave a more intense, psychoactive cannabis experience.

  • Insured Shipping To New Zealand
  • Ultra Stealth Shipping
  • Up to 10 Free Seeds
  • Germination Guarantee
Read more
Sort by
Godfather OG feminized
Godfather OG feminized seeds
C. Banana feminized
C. Banana feminized seeds
Gorilla Glue autoflower
Gorilla Glue autoflower seeds
Granddaddy Purple feminized
Granddaddy Purple feminized seeds
Girl Scout Cookies feminized
AK-47 autoflower
AK-47 autoflower seeds
Acapulco Gold feminized
Acapulco Gold feminized seeds
Girl Scout Cookies autoflower
Bruce Banner feminized
Bruce Banner feminized seeds
Bruce Banner autoflower
Bruce Banner autoflower seeds
Blue Dream feminized
Blue Dream feminized seeds
Northern Lights X Big Bud autoflower seeds
Can't find what you are looking for? Visit related categories.

High THC weed seeds for sale: all you need to know!

High THC Seeds

At WeedSeedsExpress, we have a wide range of high THC seeds for sale among our wide weed seeds catalog. You are not tied to just one specific variety of high THC cannabis seeds, as we offer your favorite indica, sativa, and hybrid strains bursting with this most well-known cannabinoid. While we now know that THC is not solely responsible for giving you that crazy high, it is one of the indicators of how potent your own homegrown weed will be. So if you want to grow high THC weed, grab one of our high THC weed seeds.

Suitable for

High THC cannabis seeds are suitable for:

Beginner and advanced growers 

Growing high THC marijuana seeds is not tied to any growing experience, as it is not by definition harder to grow a plant with higher THC levels, it just differs from strain to strain. We offer cannabis seeds in this category that are easy to grow, like the ultra-popular Granddaddy Purple feminized and Granddaddy Purple autoflower seeds. If you are just starting with your first grow today, you should also take a look at our seeds for beginners.

If you are looking for more of a challenge, you can grab Lamb's Bread feminized, which can also benefit from applying ScrOG. Stoners of all growing levels will have their options when it comes to our high THC weed seeds.

(Psychoactive) relaxation

As the great Marvin Gaye once sang: “Flying high in the friendly sky”. You might be searching for this feeling, which helps us deal with all the hardships life throws at us. Growing your own high THC weed seeds is a great way to reach this state. Yes, smoking the buds you harvested will help, but to be quite honest, growing the plant itself can also be rather calming and therapeutic. Don’t underestimate the power of cultivating your own crops from our cannabis seeds.

The best high THC strains

We have selected the best of the best, the cream of the crop (no pun intended), so you it becomes even easier to find high THC seeds that fit your next grow.

Among these 'best of' lists, we selected the highest THC strains, both feminized seeds and autoflower seeds, the highest yielding (both indoor and outdoor), and the fastest growing high THC cannabis plants. Plenty of great options for when you want to grow high THC seeds.

The highest THC seeds - feminized

While we have to iterate that potent weed seeds do not consist of high THC alone, it certainly doesn't hurt either. The following high THC strains seeds all produce THC levels of 30%! It can't get much higher than that. But these high THC strains offer much more than just high THC levels; you will find out sooner rather than later.

Godfather OG

As one of our constant best selling seeds, Godfather OG feminized seeds are an absolute powerhouse. Growing a sturdy cannabis plant, this high THC strain can not only be grown in many different environments. She is also very forgiving of mistakes by first-time growers.

As you can expect, Godfather OG weed is not for the novice smoker. While the sour notes of grapefruit, mixed with a slight sweetness, can be enjoyed by anyone, her high THC levels can truly knock you off your socks. Especially if you are sensitive to THC, so take it slow if you are not a veteran in the field of cannabis consumption.


This descendant of Girl Scout Cookies, another high-THC cannabis strain, has clearly exceeded her mother, at least when it comes to THC levels. She is also less sweet, and more floral and fruity, mixed with a pungent earthy flavor, reminisced of typical Kush strains.

Growing Do-si-Dos feminized seeds, you don't have to worry too much about mold, yet she can still be quite challenging to first time growers. If you have a bit of experience with growing high THC seeds, you should be able to pull it off. In case you are looking for an easy grow, you can also opt for Do-si-Dos autoflower seeds, which do have lower THC levels, but are quicker and much more effortless to grow.

Hellfire OG

Launched during Halloween, these High THC seeds quickly became a new favorite of many cannabis growers. And we can see why, as her balanced hybrid brings a high that works like a two-pronged devil's fork. It starts with a quick intense euphoric head high, slowly turning into total body relaxation.

As Hellfire OG feminized seeds grow into quite the bush, you will have to regularly prune her, especially during the vegetative stage. This is one of the reasons, she might not be the best high THC seeds to start with as your first grow.

Ghost Train Haze

Another spooky strain, growing Ghost Train Haze feminized seeds is quite the experience. Like many other Haze strains, these potent weed seeds do not only offer cannabis plants with high THC levels, she can also provide seasoned home growers with a good challenge.

This sativa dominant strain is known for her euphoric high, which makes you smile from ear to ear. The buds from these potent plants can even envoke light psychedelic effects, so be prepared for that; otherwise this train ride might overwhelm you.

The highest THC seeds - autoflower

Low-level THC strains are no longer the norm with these ruderalis infused weed plants. High THC autoflowering seeds are the new standard. Don't believe us yet? Just look at the THC levels of the following high-THC cannabis strains.

Hellfire OG

Just like her photoperiod counterpart is one of the four most potent strains among our feminized seeds, Hellfire OG autoflower seeds are the autoflower strain with the highest THC levels. So if you are looking to buy cannabis seeds that provide an easy-to-grow cannabis plant that grows potent buds, Hellfire OG auto is a great choice.

As an indica-dominant hybrid she grows like a nice short bush and can thrive both in an indoor growing setting and in outdoor environments. Her compact grow makes is that she can fit in smaller spaces too, so you do not need a giant grow room to grow these high THC seeds.

If you consume this 'Devil's Lettuce' for recreational purposes, you can expect powerful yet enjoyable effects. A head high will instantly brighten your mood, after which a body stone will help your body relax. Not only recreational marijuana consumers are big fans of these high THC autoflowering seeds, medicinal users also report relief in chronic pain, among other benefits.

Bruce Banner

A close second to our highest THC autoflower cannabis seeds, is Bruce Banner autoflower seeds. With her THC levels rising up to 26%, she earns that spot without a shadow of a doubt. While her ruderalis genes help her grow faster and more compact, it clearly had little effect on her potency.

Due to her being a mostly sativa expect her buds to hit you in the upper chamber. Uplifting you, she gives also give you a boost of (creative) energy, make her a perfect daytime strain. Bruce Banner weed can also make you very giggly, making you laugh about things that normally wouldn't.

If you like the sound of this high THC strain, but you are more a fan of photoperiod strains, you can also grow Bruce Banner feminized seeds. These cannabis seeds can net you an even bigger harvest, with a higher THC potential to boot.

Gorilla Glue

Super sticky weed fans will love this one. Because with Gorilla Glue autoflower seeds, growing resinous cannabis has become easier, and faster, than ever. While Gorilla Glue feminized seeds are also very doable for beginners, it's nice to know there are options for growers that are just starting out.

Her diverse flavor palette is quite interesting and complex. The aroma is a blend of petrol and woody scents that culminate in a flavor reminiscent of earthy pines. Additionally, you may detect subtle undertones of coffee and chocolate, which perfectly complement the deep and spicy notes, providing a touch of sweetness. However, due to the high THC level, some users have encountered a faint chemical taste.

This potency you will also experience in the effects of Gorilla Glue. She is pretty well-balanced, as she not only calms you down (without the risk of falling asleep), but also uplifts you in a state of euphoria. Perfect for when you just want to hang out with friends.

Highest yielding high THC Strains - indoor

The following high THC seeds are top of the line, when you are looking for massive yields under your indoor grow lights.

Amnesia Haze x White Widow feminized

Amnesia Haze x White Widow feminized seeds are a cross between, who could have guessed, Amnesia Haze and White Widow. Bringing these two Dutch classics together not only meant the creation of another wonderful high THC strain, but one that also yields very well when grown in indoor setups.

Per square meter, this mostly sativa hybrid can net you a clean 700 grams. Almost sounds like a pipe dream to us, but with the proper growing conditions, these cannabis seeds will be able to produce this wonderfully sweet and lemony weed.

Zkittlez feminized

Growing Zkittlez feminized seeds, you can expect not only a deliciously sweet and fruity taste (and a matching aroma) but also a powerful and long-lasting high. First, you experience a feeling of euphoria stimulating both your mind and body, after which a soothing sense of relaxation.

But how much of these stunning buds can you expect to harvest after the flowering period is over? Just like the previously mentioned high THC cannabis seeds, you can get ready for a nice 700 grams per square meter. In optimal conditions, that is.

Somango XXL feminized

If you are looking for a feast for your taste buds, Somango XXL feminized seeds can grow you weed that tastes like mango. Not only her flavor is like the sweet fruit, but her aroma will also make your grow room smell like a tremendous tropical paradise. No vacation needed.

In case you indeed start growing her cannabis seeds in your grow space, know that she can produce up to 675 grams per square meter. Make sure your indoor garden is optimized for this specific strain, and this type of yield is not out of the ordinary.

Highest yielding high THC strains - outdoor

But what if you do your cannabis growing outside, in the great outdoors? Well, the following strains will help you fill your jars to the brim with high THC buds. Perfect if you are a cannabis user with a high tolerance.

Green Crack feminized

Like the energizing bunny, weed grown from Green Crack feminized seeds will be able to start you up in the morning, like a typical sativa tends to do. She is also very suitable for when you want to get creative, or when you are looking to hang out all night with your friends, either at home or out in town.

Provide Green Crack cannabis seeds with the right growing environment, and her harvest will be plentiful, like the cornucopia. A max of 1200 grams per plant, to be precise. This means you will have plenty of buds to go around. Could that be another reason why Snoop Dogg loves this strain so much?

Power Kush feminized

This is a strain that earned her its name; that much is clear. Not only is Power Kush indeed powerful in her long-lasting effects, her pedigree is also rather impressive. Mixing Skunk with Afghani, she has quickly become a clear favorite among the Dutch cannabis community.

If you grow Power Kush feminized seeds outdoors, get ready for a massively heavy yield, of up to 1100 grams per plant. Just keep an extra eye out for mold, as she can be a bit more susceptible to fungal diseases.

Jack Widow feminized

A beginner grower that wants to grow their cannabis seeds outside and wants a big harvest full of high THC buds? Jack Widow feminized seeds are possibly the best choice you can make! Don't go in blind though, as a proper preparation is still key to getting close to the maximum possible yield.

And this Jack Herer descendant is indeed quite the yielder, with up to 1 kilo per plant, her harvest potential is something to write home about.

Fastest growing high THC strains

Want to cultivate your high THC seeds faster than the speed of light? Okay, that might be too much to ask, but what we can do is compile you a short list of our fastest growing cannabis seeds that fall within our high THC seeds category. These are all autoflowering seeds, as they have the shortest vegetative and flowering stages.

Hindu Kush autoflower

Hindu Kush is the famous mountainous region along the border of Pakistan and Afghanistan. It's also the name of one of the most classic strains found in the world. And while Hindu Kush feminized seeds are relatively quick bloomers, Hindu Kush autoflower seeds grow even quicker.

We calculated, with the minimum time taken into account for both the vegetative and the flowering period, you would only need eight and a half weeks to grow these classic cannabis seeds (which are infused with some Stardawg and ruderalis). This means you could grow Hindu Kush weed in less than two months! That truly makes her the cheetah of the WeedSeedsExpress seed bank catalog.

Black Jack autoflower

To get Blackjack at the casino table, you need to be extremely lucky. Luck is not needed when growing Black Jack autoflower seeds. Easy to cultivate in many different circumstances, including indoors, outdoors, and in greenhouses, without having to overthink your light cycles.

If you want a taste of her sweet 'n sour buds you don't have to wait for very long. With a flowering time of 42 to 49 days, she is almost as quick as Hindu Kush auto. Just treat this Jack Herer x Black Domina cross well, and you will harvest her before you know it.

Skywalker OG autoflower

The chosen one, at least, that is what you would assume with a strain bearing this name. If you do indeed choose Skywalker OG autoflower seeds, you can expect to grow a strain that can help expand your mind, like the Jedi before you. But you don't need the full help of the force, as even a young Padawan can grow these amazing cannabis seeds.

When her flowering stage starts, she only needs 44 to 49 days to be ready for the final trim. The empire wished they could grow their buds as fast!

Buy the best high THC seeds at WeedSeedsExpress

Why use WeedSeedsExpress

At WeedSeedsExpress, we always offer you the highest quality high THC marijuana seeds. To get the most out your new cannabis seeds, make sure to give your new potent plants everything they need. This includes the right nutrients, a proper light schedule, and much more to make sure they get all the love and care they need.

While more THC does not always equal a more potent high, choosing marijuana varieties with plenty of THC to attach to your endocannabinoid system can benefit people who are looking for the highest of highs. Just start slow if this is your first rodeo.

Now you know all you need to know to get ready for the grow of a lifetime. The only thing left to do, is order your high THC seeds today at WeedSeedsExpress.

High THC seeds FAQs

What are high THC seeds? 

Tetrahydrocannabinol (THC) is the active component of weed that provides psychoactive effects and also works on the body, after binding to your cannabinoid receptors. A high concentration of THC can undermine physical movement and affect your senses, resulting in impaired coordination. The higher the THC percentage of a strain, the more powerful the effect can be. We say ‘can’ because THC is not the sole component of a wonderful high. There is a full spectrum of cannabinoids, and even terpenes could play a part in creating that high feeling.

That said, it's difficult to measure most (besides CBD) cannabinoids and terpenes in cold hard numbers, so looking at THC levels when buying cannabis seeds is a simple way of finding out how strong your high can be. Just know that everyone’s body is different, and your experience might not always be exactly the same as the next person's.

What are considered high THC cannabis seeds?

If a strain can reach a maximum of more than 21% THC, we consider the cannabis seeds in question 'high THC seeds'. Just beware that getting to this maximum THC level does require you to create optimal growing conditions to your cannabis plants, they usually can't reach those upper levels all by themselves.

Another thing to note is that in most if not all grows, the upper bud, the top cola if you will, will be the flower with the highest THC percentage. So if you want to experience the full power of your new high THC strain, try that bud out first.

What are the highest THC seeds?

You might have scrolled past it, but our cannabis seeds with the most THC (or at least the weed that you harvest from their plants) is a four-way tie. To make it easy for you, we will list the cannabis seeds that provide weed with the highest THC levels, all yielding potent marijuana: