Marijuana strains with the highest THC levels

Did you know that cannabis has become significantly more potent over the years? Nowadays, it’s common to find strains that exceed the 20% THC limit. As the levels of this cannabinoid keep increasing, keeping up with the most powerful strains can be a little tricky. That’s why we’ve created this list of the 10 varieties with the highest THC content that are currently available in our seed catalogue.

Have you ever wondered which marijuana strain has the highest THC count? Given the large number of options that are currently available on the market, this can be a hard question to answer. What’s more, many studies indicate that cannabis is becoming more and more potent as time goes by.

Consumers are also increasingly demanding high percentages of THC. This may be because you can get greater psychoactive effects with a smaller amount of marijuana, which is always great in times of crisis. Or perhaps because high-THC strains can help alleviate the symptoms of certain pathologies in a quicker and more effective way, which makes them ideal for medical cannabis users.

So, how much THC is there in marijuana nowadays when compared to the past? In 2003, the average cannabis THC levels were around 6.4%, as opposed to the 0.72% of 1976. And, in 2018, it was estimated that most cannabis strains had THC levels over 15%. Nowadays, many genetics contain more than 20% THC. Generally, THC levels of around 18% are considered to be medium range, whereas any value above 20% is considered a high THC content.

How high can THC get in cannabis?

Currently, the most powerful cannabis strains have a THC content that in some cases can reach as high as 30%. You’re not likely to find a cannabis flower with much more than that. If you do, it’s almost certain to be related to a lab analysis error, or it’s probably a concentrate or extract.

Cannabis potency keeps increasing due to two main factors: growing techniques and genetics. By crossing different strains, breeders can increase the THC levels through genetic selection. The cross of a THC-rich strain with another THC-rich strain results in a more potent variety. In fact, most genetics with the highest recorded THC count are older varieties that ‘have evolved’ with time until reaching those increasingly higher ratios.

Pink Guava x Sunset Sherbert

New release! - RS11 (Rainbow Sherbet #11)

Immerse yourself in the world of a true THC lovers strain… Being able to surpass 30% THC, RS11 (or Rainbow Sherbet #11) is a testimony to the magic of the earth and a reminder that there is an immensity of beauty and mystery waiting to be discovered, even in the smallest things.

If a specific variety has a maximum THC potential established by its genetics, the methods used during the growth of the plant can maximise the amount of THC within that limit. Growing techniques focused on the ideal lighting, substrate conditions, or humidity and temperature parameters, can also help the flowers of the most potent cannabis varieties to reach their maximum expression in terms of tetrahydrocannabinol.

Kannabia’s strains with the highest THC levels

Now that we’ve analysed these key data on the potency of marijuana, it’s time to dive into the list of the 10 Kannabia strains with the highest THC concentration. We hope you enjoy them! But always remember: with great power comes great responsibility; so, if you’re not used to the high THC levels that marijuana can offer, make sure you use these plants sensibly.

1- RS11 (THC: 30%)

Without any doubt, this is the flagship of our collection of super powerful genetics thanks to THC levels that can easily exceed 30%… A mark that places this strain amongst the most potent varieties available on the market today. As a newcomer to our catalogue in 2024, she continues to garner critical and public admiration. This variety is especially effective for seasoned users seeking a strong and lasting effect, both relaxing and euphoric, which makes this plant a great ambassador of indica-dominant strains called to mark an era.

2- Colombian Jack (28% THC)

Colombian Jack is another of the most powerful strains that you’re going to find in our seed collection. Her delicious citrus fruit and ground pepper aroma anticipates what is more than just a trip to outer space. After a few hits, you’ll soon get to know her balanced and energising effect, which makes you feel euphoric and generally happy. This plant is ideal for spending long days doing things, especially when a little calm energy and motivation can go a long way to help you achieve whatever you’ve set out to do.

3- Girl Scout Cookies (25% THC)

This is another classic whose high will catapult you onto a wave of euphoria with a tingling that will encapsulate your body with very little effort. Her buds will make you question the notions of space and time, whilst you experience dizzying waves which will give you giggling fits; though this will flow into introspection from time to time. This tranquilliser-like sensation takes you to a place of full relaxation, putting an end to your stress and even getting you ready for a good night’s sleep.

4- Cookies Haze (23.3% THC)

Cannabis can often make our minds wander, but this isn’t the case of Cookies Haze. This strain lets you harness the energy of your clear mind to infuse creativity in every puff. Whether you’re in the office, working on an important project, or you’ve finally decided to redecorate your home, you’ll definitely want to have her buds by your side to put a smile on your face.

5- Amnesi K-Lemon (23.3% THC)

This three-way crossing of Amnesia x Lemon Skunk x Jack Herer imbues users with a cheerful and stimulating buzz that lends itself to creativity and fantasy. These uplifting effects naturally reduce stress, depression, and fatigue, making this beauty the perfect companion for active and busy cannabis users.

6- Sativa Dream (23.2% THC)

This is a brilliant strain to share with friends, as her strong and continuous high is perfect for fun evenings chatting and having a laugh. The distorted perception of external stimuli may disorient some users; although, in the right environment and situation, this cerebral buzz combines with a powerful boost to your mood that makes you love everyone intensely.

7- Mataro Blue (23% THC)

This girl lifts the mood substantially and is great to have before a night out with friends, since she keeps doubts and insecurities at bay to ensure that you have a cracking time. Beside these cheerful and heady effects, this hybrid delivers a series of relaxing effects that are ideal for work: you’ll feel as if you’re having a full body massage as all pains and tensions slowly leave your body.

8- Purple Kush (22.9% THC)

Unlike some hybrids that begin with a disorienting mental effect which then melts into a slow sense of calm, Purple Kush takes you directly to a place of physical relaxation. Smokers will appreciate the calming effects of music and their visual environment. Nonetheless, rather than stimulating hyperactive thoughts and sharp concentration, this strain is more likely to produce a state of stunned satisfaction. The permanent smile produced by Purple Kush will definitely invite you to enjoy this indica at night.

9- Break-Up Cake Auto (22% THC)

If you feel tired or exhausted during the busy working week, give yourself a break: a dose of this autoflowering can calm things, replacing mentally painful thoughts for dizzying ones. Those who have trouble sleeping love this strain, as she can soften the brain during the night. However, she also delivers a specific physical effect which reduces inflammation levels, or can even alleviate muscle spasms and migraines.

10- Dream Sherbet Auto (22% THC)

Like many other indicas, Dream Sherbet produces a high that slowly increases before her effects are fully detected. What starts as pressure in your eyes and forehead soon dissipates into soft relaxation in the limbs and torso, leading you to lie down happily in the nearest comfortable place. Having said that, this doesn’t mean that she doesn’t produce any mental stimulation: even if you end up couch-locked, you can still experience imaginative thinking and daydreaming whilst your mind stays clear and alert.

11- Gorilla King Auto (22% THC)

Gorilla King’s punch is as tempting as her flavours. She delivers a relaxing indica touch that goes hand in hand with soft waves of euphoria which hit you right from the start, to create a long-lasting buzz that moves from your head to the tips of your toes and vice versa, taking you to an energetic and even creative mental space. She’s ideal for the artist looking to start a new project, or for the social butterfly that flits around whilst praising the benefits of THC to make our lives a little better.