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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Rainbow Donut Auto

Rainbow Donut Auto is our newest autoflowering cannabis strain, with which we once again reach new h..

From £22.45

Rainbow Runtz

As many people came with the runtz Growers Choice made their own version of that strain. It is ..

From £19.95

Raspberry Zkittlez

Discover the delightful experience of Raspberry Zkittlez, a premium cannabis strain crafted by the r..

From £21.45

Raspberry Zkittlez Auto

Cali Weeds Blue Dream Auto is a sub breed of their original cult classic. This cut of Blue Drea..

From £15.95

Red Banana Pudding

Red Banana Pudding: An Indica-Dominant Marvel of Luscious Flavors and Powerful Effects. Red Ban..

From £29.95

Red Cherry Berry

Barney’s Farm has backcrossed their best Skunk strain with its Californian ancestors, creating some ..

From £19.70

Red Diesel

The legendary NYC Diesel taste blends very nicely with the sweet citrus flavors of the Californian O..

From £21.25

Red Dragon

Red Dragon cannabis seeds have been created using a Himalayan Kush crossed with an original Brazilia..

From £19.25

Rhino Ryder

If you need medical cannabis, this is your strain. It's an autoflowering feminized adaptation of Med..

From £7.95

Rollex OG Kush

These amazing cannabis seeds must not be mistaken with Rolex, our stunning Rollex OG Kush is timeles..

From £37.95

Royal Cookies Auto

Royal Cookies Automatic: Dank Cookies In A HurryDank ingredients and deluxe sizeRoyal Cookies Automa..

From £10.00

Royal Gorilla Auto

Royal Gorilla Automatic: The Next Level Of Autoflowering EvolutionMeet the new heir to the autoflowe..

From £10.00

Royal Madre

One of the biggest driving forces in legalizing marijuana in one country after another is medicinal ..

From £7.00

Royal Moby

Since the days of the early skunks we have primarily used Sativa and Indica hybrids to produce new t..

From £8.00

Royale Haze

Royale Haze cannabis seeds by Dinafem Seeds belong to a Sativa-dominant cannabis strain obtained by ..

From £6.50

RS-11

RS-11 Seeds AKA Rainbow Sherbert #11 are a mix of (Zkittlez x OGKB) x Pink Guava. The result is..

From £9.95