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Thanks to technological advancements in the breeding industry, today’s cannabis strains have a higher THC content than ever before. In the 70s, strains like Panama Red used to knock stoners’ socks off with a THC content of 15-17%. Nowadays, the strongest cannabis strains available today contain THC levels of between 30% and 34%.

Of course, we must keep in mind that different growing conditions for the same strain of cannabis might result in different THC concentrations. Most of the strains with the highest THC levels have been older phenotypes that have been crossbred and hybridized over time to have higher THC levels.

Whereas it is quite hard to identify one strain as the definite record holder, we’re presenting you with our pick of the strongest marijuana strains in 2023.

Let’s check them out!

Ghost Train Haze

Ghost Train Haze is a strain with a high Sativa to Indica ratio (80% Sativa to 20% Indica). It has won numerous High Times Cannabis cups, including first place Sativa in 2014. In fact, this strain has consistently won High Times awards for the strongest strains on earth. A popular Sativa-dominant hybrid, Ghost Train Haze can contain up to 25–28% THC. So, you should smoke it in light doses especially if you’re a beginner.

Some claim that because Ghost Train Haze is so strong, it can cause psychedelic effects. You’ll experience uplifting energy and a deep state of euphoria when smoking it. Additionally, its hazy effects will help to calm your mind. It’s a great smoke for the day, but because of its strength, consider starting low and going slow if you want to be productive.

Godfather OG

Godfather OG, is thought by some to be the most potent strain in the world. Though some think it’s more stable at around 28% THC, there are phenos of this strain that were tested to have a 34% THC content. This strain cross between Alpha OG and XXX OG, so the outcome is a potent high with sedative effects, strongly advised for severe medical conditions. 

The taste of this strain is spicy and sweet, with a tinge of grape — a flavor profile not very common for Indica-dominant varieties. Godfather OG has won the award of Best Indica at the Los Angeles Cannabis Cup in 2013.

GMO Cookies

Every strongest marijuana strains list must include GMO Cookies. This is a strong, 90% Indica, 10% Sativa strain with a strong sedative effect and a long-lasting high. GMO Cookies is popular among Indica enthusiasts worldwide because of its intensely tranquil effect and potent aromas. 

Grease Monkey

After the crossing of Cookies and Cream (which has a THC content of 26%) and Gorilla Glue (which has a THC content ranging from 25 to 30%), this Indica-dominant strain has a staggering 31% THC level. This potent flower flawlessly combines the intense effects and incredibly sweet and nutty flavor of its parent strains. The strain’s sedative qualities are well known, and many users report experiencing a relaxing body high and a couchlock effect.

Durban Poison

Sativa-dominant marijuana strain Durban Poison is an award-winning strain that is widely known for its distinctive citrus flavor with a hint of spicy hashish that will leave you feeling energized and productive. 

You should be aware that Durban Poison is an extremely potent strain with THC levels ranging from 15% to 30% so depending on the person’s level of tolerance, the effects may linger for several hours. Consider trying UpNorth’s Durban Poison variety to experience its potent high and hype up! 

WTF OG

A slightly indica-leaning hybrid, Northern Emeralds has crafted this gem for its mellow and relaxing effects. Covered in amber hairs, these deep forest green nugs have a potent sweet blueberry pine flavor with hints of earthy skunk.

Known to induce uplifting cerebral euphoria while calming the body, WTF OG comes from a known history of cultivators with a deeper knowledge and appreciation for the flower. 

Future #1

Due to its exceptional potency, Future #1 from 7 Points Oregon is creating a lot of buzz in the cannabis community. Future #1 has a high terpene level in addition to its high THC content (30-37%), which results in a tropical flavor with rich citrus and pine scents. 

This strain is said to deliver a very uplifted high that is ideal for socializing and getting creative. Don’t use too much though because it has been known to create overwhelming psychedelic experiences. This strain is helpful in treating depression, reducing stress, and relieving muscular aches.