High THC Cannabis Seeds

High THC Cannabis Seeds

This section is a collection of the most powerful and potent high THC cannabis seeds available to our team at SeedMasters.com!


We have carefully picked the very strongest strains in terms of high THC content, saving you time and providing you with some ferocious world class genetics that will seriously blow your socks off! We are excited to showcase the indisputable potency of these champion strains and to do our bit to make them more accessible as a whole.

Our High THC cannabis seeds are reserved for those with real tolerance, those who are brave, and those who are just plain irresponsible! This list is NOT for newbies!!!

These strains are perfect for the professional, long-term enthusiasts looking to put some raw horsepower behind their breeding operations, for the established home-growers looking to try something even more rewarding, or just for anyone with courage who is looking to put some hairs on their chest! Whatever your situation, it's safe to say these will not disappoint!

..and as always you can expect nothing less than 
high-quality cannabis seeds when you buy from our team here at SeedMasters.com! 
Show:
Sort By:

Jack Plant

Jack Plant is a specifically selected Sativa-dominant phenotype of the world-renowned Jack Herer can..

From £28.75

Jackpot Auto

We’re proud to announce the arrival of Jackpot, an outstanding cross of the legendary Jack Herer and..

From £23.95

Jealousy Dankness

Jealousy Dankness by Anesia Seeds: Power, Flavor, and Incredible Yields. Anesia Seeds' Jealousy..

From £29.95

Jon Snow

Jon Snow is an Indica dominant hybrid that is regarded by many to be the most powerful OG strain on ..

From £15.95

Jon Snow Auto

Jon Snow is an Indica dominant hybrid that is regarded by many to be the most powerful OG strain on ..

From £15.95

Julie's Cookies

Julie’s Cookies are Big Head’s reworking of the fabulous multi award-winning strain Girl Scout Cooki..

From £35.95

Jumbo Runtz

Introducing Jumbo Runtz by Yieldmonger, a strain that embodies the best of modern cannabis breeding...

From £39.95

K.O Kush

From a batch of super genetics OG Kush Growers Choice selected this one plant with outstanding quali..

From £19.95

K.O. Kush

This is a fight we assure you that you will lose. This Indica dominant is a serious heavyweight for ..

From £23.95

Kali 47

Kali 47 marijuana seeds are a strong and vigorous Sativa-dominant hybrid with an outstanding aroma a..

From £17.65

Kali AK

Take one look at a Kali AK plant from Original Sensible marijuana seeds and you will realise why thi..

From £31.00

Kaya 47

Kaya 47 is a carefully selected AK47 which combines the high-class features of its legendary lineage..

From £18.75

Khufu

Khufu has that typical sweet flavor of original Kush cannabis seeds, it was named after the 1st pyra..

From £35.95

Killer Purps

Lovers of colour take note, Killer Purps has landed! These sativa dominant cannabis seeds are a..

From £26.85

Kosher Kush

From Kosher Kush, you can expect piles of buds because of its tight internode spacing. Just be sure ..

From £8.95

Kryptonite

We took several phenotypes of the Granada Mountains and crossed them with our varieties to find a pl..

From £4.95