Highest THC Strain


Looking to test your tolerance with something a little more potent? Or perhaps try out a stronger strain to help deal with more stubborn medical issues? Either way, Seed Supreme has you covered. Our comprehensive seed catalogue includes an extensive range of high THC strains, capable of producing the kinds of plants that pack a serious punch.

Recent years, in particular, have brought about the cultivation of some of the most powerful cannabis strains ever created. Though high THC strains have always existed, they’re far more readily available and consistent than ever before. A variety of factors contribute to THC levels in any given cannabis strain, including its phenotype, growing conditions, seed quality and more. Seed Supreme goes the extra mile to guarantee unbeatable quality and value for money - high THC seeds you can count on.

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What's the difference between THC and CBD?

Stop! Before we go any further, let's make sure you're really looking to add the highest THC strains to your arsenal. This video explains the key differences between THC and CBD, the two most generous cannabinoids found in ganja.

The Highest THC Strains

As we've mentioned, exact levels of the psychoactive ingredient in any given cannabis strain will vary significantly in accordance with multiple factors. Even if you grow the same strain five times in a row, you could be looking at five entirely different levels if the cultivation conditions aren’t consistent.

In any case, there are certain cannabis strains that are known to produce the highest THC levels of any strains currently on the market.

Here are 4 to keep your eyes open for among the ranks of the highest THC strains:

girl scout cookies

Girl Scout Cookies

Cooked up by the legendary Cookie Family using OG Kush and F1 Durban genetics, GSC stands strong as a seriously powerful and impressive hybrid strain.

Slightly Indica-dominant and simply stunning to behold, this potent pot regularly charts from 18-28% THC.

Downright delicious and incomparably irresistible, the GSC strain is far more than the quintessentially comfortable high it offers, or the beautiful cerebral uplift and complete body melt.

This remarkably high THC strain is also routinely prescribed for medicinal use. From stress and anxiety to migraines, ADHD and everything in between, GSC's ability to deliver a huge hit of relaxation while simultaneously gifting an instant mood-boost has made it the stuff of legends among medical cannabis users worldwide.

gorilla glue strain

Gorilla Glue

Something of a modern classic, the Gorilla Glue strain takes potency to genuinely unprecedented levels.

Despite having been created purely by accident, Chem's Sister, Sour Dubb and Chocolate Diesel genetics came together to produce a strain with up to 30% THC – sometimes even higher. One hit is often enough to do the business in a big way.

Gorilla Glue is a truely beautiful beast and mighty contender for king of the highest THC strains.

Boasting a strong earth-like, somewhat sour aroma inherited from its parent strains, along with a spicy and diesely aftertaste, this high-quality Indica is ideal for recreational and medicinal use, combatting everything from physical pain to stress, depression and insomnia, to name but a few.

Nightcrawler OG Kush cannabis

OG Kush

Often packing THC levels of close to 20%, the OG Kush strain is known far and wide for being an instant and long-lasting stress-buster.

Many believe this Indica-dominant, spectacular strain to be the product of combining Hindu Kush with Chemdawg, though, as is the case with many legendary cannabis strains, the exact origin of OG Kush is the subject of huge debate.

OG delivers the perfect combo of punchy high, captivating spiced-pine flavour and never-ending buzz. While certainly not the most potent of the highest THC cannabis club, this ganja is a true powerhouse highly deserving of its world-renowned status.

Jack Herer cannabis

Jack Herer

As with all true legends, the origins of this timeless ganja are shrouded in mystery.

We do, however, know we owe its existence to a magical merging of Haze, Skunk and Northern Lights genetics. This blend creates in the Jack Herer strain a combination to dream of; solid Indica yields and monstrous coatings of resin.

This Sativa-dominant strain regularly tests between 15-25% THC, and its salivating scent is truly unforgettable. A boon to the creative cannabis connoisseurs and marvel to the medical community, Jack Herer is one no-one should pass up.

The Benefits of the Highest THC Strains

Potency brings a number of advantages to the table, which go over and above the obvious. Of course, some would argue that the biggest advantage is its capacity to get you unbelievably high, unbelievably quickly. Nevertheless, it’s also worth bearing in mind that weed with higher THC levels can also be incredibly economical.

The more potent the marijuana, the less of it you need to consume to achieve the desired effect. Particularly when using a vaporiser, high THC ganja offers outstanding value for money.

In addition, high THC weed is routinely recommended for the treatment of more advanced and chronic medical symptoms. When typical medical cannabis doesn’t provide sufficient relief, switching to a stronger strain could make all the difference.

And as a little high THC cannabis goes a long way, you may only need to grow a couple of plants (if legally entitled to do so) to fulfil your requirements, as opposed to an entire indoor cannabis farm.

Growing Cannabis with Higher THC

Contrary to popular belief, high THC weed isn’t necessarily any more difficult to grow than any other cannabis. As is the case with all marijuana strains, you need to simply provide the plants with the conditions they need to reach their full potential.

Higher THC strains have been produced by marijuana engineers worldwide in a variety of different climates. Hence, ideal growing conditions vary enormously from one strain to the next. While some are perfectly suited to cooler northern climates, others will only fulfil their potential in consistently tropical conditions.

If planning to grow any of the highest THC strains for recreational or medical purposes, you’ll need to carefully consider the conditions your chosen strain requires.

Once again, however, high THC cannabis can be comparatively easy to grow as you’ll only need a handful of plants to produce more quality pot than you’ll know what to do with.

High THC Seeds

As always, the key to successful cultivation when it comes to mighty marijuana lies in starting out with the best genetics. You cannot and will not produce quality cannabis if the seeds you germinate don’t allow you to do so. For this reason, we suggest seeking out our extensive range of autoflower and feminized seeds.

Here at Seed Supreme, we exclusively stock the highest-quality cannabis seeds to suit all recreational and medicinal requirements. Our selection of strong THC seeds has been personally vetted by our own team of experts, in order to guarantee unbeatable quality and value for money. We stand by the quality of the seeds we sell, ensuring we’re always at the front of the queue when the latest high THC strains emerge.

For more information on any of our products or to discuss placing an order for high THC marijuana seeds, contact a member of the Seed Supreme customer support team today.