10 Highest THC Weed Strains To Try

High THC Cannabis plant almost ready for harvest

A few decades ago, THC percentages used to top out at around the 10% mark.

However, it's now possible to find strains that contain a staggering 30% THC or greater.

These intensely potent varieties provide the most intense psychoactive effects possible from the cannabis plant.

In this article, we'll look at 10 of the strongest weed strains in the world.

1. Do-si-Dos - 30% THC

Do-si-Dos from WeedSeedsExpress grown by Theia and Ned_Schneebly on Growdiaries

Do-si-Dos is an Indica-dominant powerhouse packing a hefty 30% THC punch, perfect for those chasing intense relaxation and a euphoric ride. With its mix of sweet, earthy, and peppery flavors, it’s like a sensory adventure in every puff.

This strain doesn’t just chill you out—it sweeps you off your feet and straight into bliss. So, if you're looking to unwind and kick back with a strain that knows how to deliver, Do-si-Dos is ready to take you there.

2. Ghost Train Haze - 30% THC

Ghost Train Haze from WeedSeedsExpress grown by Drgreenthumb627 on Growdiaries

Ghost Train Haze is a Sativa-dominant rocket with an insane 30% THC that’ll send you on a ride of pure euphoria and focus. With its spicy, sweet, and woody flavor profile, this strain delivers an unforgettable experience in both taste and effect.

Known for its powerful, uplifting high, Ghost Train Haze is perfect when you want to get your creative juices flowing or just vibe out in an energized haze.

3. Godfather OG - 30% THC

Godfather OG from WeedSeedsExpress grown by WildeWeed on Growdiaries

Godfather OG is the boss of all strains, flexing a massive 30% THC that’s not here to mess around. This indica-dominant hybrid packs a powerful punch, delivering a knockout high that’s perfect for serious relaxation.

With its earthy, piney flavor, Godfather OG is a top pick for those who appreciate a rich, classic taste. If you're looking for a heavy-hitting strain that commands respect, Godfather OG is ready to make you an offer you can't refuse!

4. Hellfire OG - 30% THC

Hellfire OG from WeedSeedsExpress grown by smoking_hills9 and Mosquito_Haarlem_Holland on Growdiaries

Hellfire OG lives up to its name, packing a fiery 30% THC that’ll ignite your senses and elevate your experience. With a perfect 50/50 balance of indica and sativa, this hybrid serves up the best of both worlds—expect bursts of creativity, focus, and euphoria, all wrapped in a layer of relaxation.

Its flavor is as intense as its effects, blending citrus, diesel, lemon, and pine for a bold, unforgettable taste. If you're ready to turn up the heat, Hellfire OG is here to deliver a dynamic ride!

5. Jealousy - 30% THC

Jealousy from WeedSeedsExpress grown by WSE

Jealousy is an indica-dominant stunner with a knockout 30% THC that’ll leave you in a blissful, relaxed state. Born from the iconic pairing of Sunset Sherbet and Gelato, this strain brings a delicious mix of nutty, sweet cream, citrus, and kush flavors that’ll have you savoring every hit.

With its euphoric and happy effects, Jealousy is perfect for unwinding and getting into a creative groove. It’s the kind of strain that’ll definitely have others feeling green with envy!

6. Blackberry Moonrocks - 33% THC

Blackberry Moonrocks from WeedSeedsExpress grown by Rock_n_Roll_Randy on Growdiaries

Blackberry Moonrocks is an Indica-dominant heavyweight with a mind-blowing 33% THC that delivers a potent, relaxing experience. Its rich flavor profile is a burst of berries, blueberry, lavender, and a dash of citrus, making every puff a sweet treat.

Perfect for unwinding after a long day, this strain brings a wave of happiness and calm. If you’re after something that hits hard and tastes even better, Blackberry Moonrocks is a must-try!

7. Permanent Marker - 34% THC

Permanent Marker from WeedSeedsExpress grown by CanarianGrow92 on Growdiaries

With a potent 34% THC, the Permanent Marker strain from indica seeds delivers intense psychoactive effects that even seasoned smokers will feel.

Its indica-dominant profile hits fast, blending deep relaxation with a rush of creativity and racing thoughts, leading to a blissed-out couchlock. This strain is recommended only for experienced users due to its strength.

8. Sleepy Joe OG - 34% THC

Sleepy Joe OG from WeedSeedsExpress grown by Rock_n_Roll_Randy and Asnoriu on Growdiaries

Sleepy Joe OG, a cross of Obama Kush and Nova OG, boasts a strong 34% THC, delivering powerful effects that even seasoned users will feel. It starts with euphoric vibes before relaxing the body into a deeply stoney state, perfect for evening use.

This top-shelf strain combines creativity with profound physical and mental relaxation for a blissful experience.

9. Chiquita Banana - 34% THC

Chiquita Banana from WeedSeedsExpress grown by K820 and RebelMove on Growdiaries

Chiquita Banana, with up to 34% THC, delivers intense psychoactive effects, starting with euphoric positivity and creativity before melting into deep relaxation and couchlock.

Expertly cultivated for its high THC, this top-shelf strain is ideal for seasoned users looking for a strong recreational experience but may be too potent for beginners.

10. Fat Bastard - 38% THC

Fat Bastard from WeedSeedsExpress grown by WSE

The autoflowering Fat Bastard strain boasts an impressive 38% THC, delivering an intense psychoactive punch. Its potent effects hit quickly, inducing deep body relaxation and a spaced-out cerebral journey, strong enough to floor even experienced users.

Though it grows quickly and discreetly, Fat Bastard is best approached cautiously by all but the most tolerant smokers.

Need More High THC Strains?

We hope you found a strong weed strain from our list. For even more choices, check out our full range of high THC marijuana seeds.

Happy growing!