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! 
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San Fernando Valley x The Purps

San Fernando Valley Purps is 2 legends combined into one plant. Growers Choice have had the Pur..

From £35.45

Santa Marta Haze

With a 10 week bloom time, Santa Marta Haze is the best genuine Haze variety that Seedstockers has f..

From £11.45

Santa Marta Haze Auto

Santa Marta Haze Autoflower is a THC-rich auto-flowering Haze variety that is very easy to grow.&nbs..

From £11.45

Santa Sativa

Santa Sativa cannabis seeds by Dinafem Seeds belong to a feminized, Sativa-dominant cannabis strain ..

From £6.50

Shaman

A proven variety dating back to the 1980's, Shaman is a reliable, robust and highly potent F1 hybrid..

From £18.00

Shark

A cross between Super Skunk and Northern Lights, Shark has such a good taste and amazing smell that ..

From £5.95

Shark Attack

Shark Attack cannabis seeds by Dinafem Seeds belong to a feminized, Indica-dominant cannabis strain ..

From £6.50

Shark Widow

Shark Widow cannabis seeds are an almost 100% pure Indica with a flowering period of fewer than 60 d..

From £12.85

Sherbet

This is a powerful THC-rich variety with prize-winning Sherbet genetics. These Indica genetics ..

From £13.45

Sherbet

Sherbet is an 85 % Indica hybrid strain that is a result of crossing the potent Girl Scout Cookies a..

From £8.95

Sherbet Auto

The only thing more desirable than the award-winning Sherbet genetics is Sherbet Autoflower genetics..

From £13.45

Shining Silver Haze

Ever since a pair of brothers started breeding Sativas from all over the world back in the 70s, cann..

From £7.00

Silver Grape Sherbet

After making a beautiful blend of the real Dutch Super Silver Haze with the excellent flavour of the..

From £35.45

Six Shooter

Here we set our sights on the goal of creating a super productive auto-flowering feminized cannabis ..

From £9.95

Skunk

Skunk is one of the most classic cannabis strains in the world and is often used as a base for many ..

From £4.60

Sleepy Joe

For Sleepy Joe, we took a long time to select an Obama Kush for potency and aroma and then crossed i..

From £26.95