High THC Strains

WHEN POTENCY MATTERS MOST, GO FOR SEEDS THAT START AT 20% THC!

If pure power is what you're going for, Feminized Seeds has you covered. Using advanced breeding techniques, our latest strains exceed 20% THC on average. Some, like Crystal Gelato, actually pushed past the 25% mark during testing. That's mind-blowing!

These Feminized Seeds Are Stronger Than Many Extracts - Check'em Out! !

  • Maximum Potency

  • Incredible Flavours

  • Rich & Full-Bodied

  • Tolerance Busting

  • In High Demand

High THC Strains
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  1. White Widow

    Dutch Passion
    White Widow
    • Original 80's F1 Genetics
    • Truly Old School Flavours
    • Stupid Trichome Production
    • 8 - 9 Weeks Flowering
    This White Widow F1 stays as close to the White Widow genetics of the 80's as it's possible to get. Potent, re
    This White Widow F1 stays as close to the White Widow genetics of the 80's as it's possible to get. Potent, resinous and containing the DNA that helped define the modern conception of cannabis, you have to try this seed.
  2. The Ultimate

    Dutch Passion
    The Ultimate
    • Massive Yields: 750gr/m2
    • Sativa Dominant
    • Very High THC
    • Small Height: 75cm
    With yields pushing 750gr/m2, The Ultimate is one of the highest yielding cannabis strains on the market. Sativa dominan
    With yields pushing 750gr/m2, The Ultimate is one of the highest yielding cannabis strains on the market. Sativa dominant genetics make for a potent, uplifting high as well. There's no reason not to try this plant!
  3. Sour Surge

    Penthouse Seeds
    Sour Surge
    • 23% THC
    • US Genetics
    • Fizzing Flavours
    • Fast Flowering
    By bringing together Fruity Pebbles and Zkittlez, Penthouse Seeds Co brought Sour Surge to life. And what a momentous bi
    By bringing together Fruity Pebbles and Zkittlez, Penthouse Seeds Co brought Sour Surge to life. And what a momentous birth this was. Delcious, powerful and fast, it's got it all.
  4. Girl Scout Cookies

    Feminised Seeds
    Girl Scout Cookies
    • 26% THC Conent
    • 600gr/m2 Yields
    • Famous GSC Flavours
    • Fast Flowering Times
    A world famous strain in a new iteration, Feminised Seeds Girl Scout Cookies is packed with THC and great flavours. High
    A world famous strain in a new iteration, Feminised Seeds Girl Scout Cookies is packed with THC and great flavours. High yielding, fast growing and just amazing, what are you waiting for?
  5. British Outdoor Mix

    Feminised Seeds
    British Outdoor Mix
    • Random Mix Of Seeds
    • All Tough And Resilient
    • All Photoperiod
    • Great Results From All
    A lucky dip of hardy cannabis seeds, what sounds better? You won't know what you've got til it comes to harves
    A lucky dip of hardy cannabis seeds, what sounds better? You won't know what you've got til it comes to harvest tiem, but we promise that everything in these packs is specifically chosen to thrive in the arduous British climate.
  6. Dos Si Dos

    Feminised Seeds
    Dos Si Dos
    • Up to 28% THC
    • Huge Yields
    • Mint, Lime and Cookies Flavours
    • GSC Genetics
    Dos Si Dos is world famous for being amazing, and here's one of the best iterations available. If you like complex
    Dos Si Dos is world famous for being amazing, and here's one of the best iterations available. If you like complex flavours and complex highs, look no further than feminised seeds Dos Si Dos.
  7. The Widow

    Feminised Seeds
    The Widow
    • Great For Extractions
    • 20% THC
    • Speedy: 7 - 8 Weeks Flowering
    • Kush Flavours
    This development on White Widow genetics is a firm favourite among many, and probably soon you too. If resin production
    This development on White Widow genetics is a firm favourite among many, and probably soon you too. If resin production and potent, kush-like effects are your jam, then so is The Widow,
  8. Sugar Mama Auto

    Feminised Seeds
    Sugar Mama Auto
    • 70% Sativa Genetics
    • Cerebral Buzz
    • Fast Growth
    • Sweet, Fruity Flavours
    This speedy, delicious strain has 70% Sativa genetics and will blow your mind with its cerebral goodness. Even so, it gr
    This speedy, delicious strain has 70% Sativa genetics and will blow your mind with its cerebral goodness. Even so, it grows with the speed and ease of its indica cousins, and basically has the best of both worlds. Get some now!
  9. Blue Treacle Automatic

    Feminised Seeds
    Blue Treacle Automatic
    • Delicious, Berry Flavours
    • High Potency
    • Great Yields
    • 8 - 9 Weeks Lifecycle
    A sugary, blueberry flavours autoflowering seed from Feminised Seeds. These little things pack all the DNA necessary to
    A sugary, blueberry flavours autoflowering seed from Feminised Seeds. These little things pack all the DNA necessary to get you a rapid crop of high powered, low-odour cannabis plants.
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