BackTop 5 cannabis varieties of 2025 with the highest THC count
26.02.2025
For those looking for extreme potency, we have prepared a selection for this year that will make you fly incredibly high. Five ladies that not only have outrageous THC levels but also exude quality left, right, and centre: great flavour, high productivity, and ease of cultivation… What more can you ask for? We present the most powerful genetics for those looking for strong sensations.
The five marijuana seeds with the highest THC levels this season
Nowadays, it is possible to find cannabis varieties on the market with different cannabinoid profiles. A good example of this are CBD seeds, which are ideal for medical users who want to benefit from the therapeutic properties of CBD, or for those growers looking for a more sustainable effect. However, we know that some cannabis growers demand high THC cannabis strains, either for therapeutic reasons or for recreational use. Today we’re bringing you a selection of our most potent marijuana varieties – but please beware!: the high-flying psychoactivity of these cannabis gems isn’t suited to everyone, so fasten your seat belts and get ready for lift-off!
Permanent marker: an effect that you won’t forget
We start this ‘Top 5’ with one of our recent releases: Permanent Marker. A feminised cannabis seed with THC levels as high as 33%... Overpowering potency that begins with a feeling of euphoria that promotes creativity, and which is ideal to open your mind and let yourself go. As time passes, her effect transforms into a state of deep bodily relaxation, which is ideal for releasing stress and tensions accumulated in the body. This hybrid, newly arrived from the US, is the result of the cross of three elite parents: Biscotti, Sherb BX, and Jealousy, from whom she’s inherited an intense and complex taste of sugary cookies, fresh herbs, and diesel notes on an earthy background. Permanent Marker is extremely easy to grow and produces XXL crops: up to 600 g per square metre indoors, and 1000 g per plant when grown outdoors. And the icing on the cake is her short flowering period – she’s ready for harvest in just 8 - 9 weeks of flowering.
White Truffle: out-of-this-world potency that’s accessible to all growers
Another new jewel in the Linda Seeds catalogue. This American hybrid is the result of the cross of Gorilla Glue #4 and Peanut Butter Breath, from whom she has inherited her best qualities: an abundant production of ultra-sticky resin that exudes a truly special sweet aroma, with touches of walnuts and earthy notes, and a subtle shade of Kush. With THC levels of up to 31%, the psychoactivity of this strain is definitely not suitable for beginners. It starts with a clear mental effect, which is ideal to let go of circular thinking and any worries you may have. Thanks to her slight indica dominance, White Truffle’s effect soon turns into a pleasant couch-locking body relaxation, described by many as soothing, with a sense of well-being. Growing this beauty is incredibly simple. She grows into a robust and versatile plant that offers yields of up to 650 g per square metre in indoor grows, and up to 1100 g per plant when grown outdoors.
Auto Apple Fritter: autoflowering speed, exorbitant psychoactivity
Our Auto Apple Fritter has been designed for fans of autoflowering seeds looking for strong experiences. With THC levels as high as 25%, this automatic strain combines the best of both worlds. Fruit of the cross of Sour Apple x Animal Cookies, this variety masters some incredibly special qualities:
- Premium aroma: A sweet taste of freshly baked apple with spicy touches and notes of vanilla.
- A powerful effect that is cerebral to start with, followed by feelings of euphoria and joy which gradually turn into pleasant physical relaxation.
- Short life cycle: This autoflowering strain is ready for harvest in just 9 - 10 weeks (from germination to harvest).
- Incredibly easy to grow – with just a little TLC, she can produce generous yields of up to 600 g per square metre indoors, and up to 250 g per plant outdoors.
Cheese Ghost Train: reinventing the most famous cheese flavour
Our breeders excelled by crossing the legendary elite clone UK Cheese with Ghost Train Haze from Rare Dankness. The result is a strain that offers an innovative flavour and extreme potency. Cheese Ghost Train has made it onto our list of the most potent genetics this year. With her THC levels over 30%, this is one of the most potent sativa-dominant hybrids on the market. A strain that delivers incredibly intense psychoactivity that is both cerebral and long-lasting. Her terpene profile is a twist on the classic UK Cheese flavour – although present, this is nicely balanced with the citrus and fruity notes of Ghost Train Haze. In terms of cultivation, Cheese Ghost Train grows vigorously, producing XXL yields (of up to 650 g per square metre) with an incredibly intense aroma. This is a robust strain that is resistant to mould and fungi – a trait inherited from her Cheese lineage, which comes in handy when growing in humid climates.
Oreoz: the flavour that has taken the West Coast by storm
We close out this killer cast with a Californian hybrid whose THC levels can reach 32%. Extreme potency combined with a unique aromatic profile that includes notes reminiscent of the famous cookie, along with hints of chocolate, nuts, and diesel. This strain shouldn’t be taken lightly – although her THC levels are usually around 32%, she can produce up to 37% when grown under the right conditions. This strain is suitable for growers with a high tolerance to THC who are seeking experiences at another level. With her long-lasting and overwhelming effect, she delivers feelings of euphoria when consumed in small doses, and a powerful ‘couch-lock effect’ if a generous amount is used. Oreoz is easy to grow and produces robust plants that easily adapt to all types of setups, leading to XXL harvests. A must for those who want to fill their larder to the brim with ultra-potent quality cannabis.
That’s it for our recommendations for today… But if you’ve been left wanting more, then don’t worry, because we have an extensive catalogue of marijuana varieties with extremely high THC levels for every taste. Do you dare to try them?