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MK Ultra feminized seeds



MK-Ultra: Grow a Champion!

MK-Ultra is a feminized photoperiod cannabis strain created by T.H.Seeds. Named after the infamous mind control experiments in the 1950’s, this Indica-dominant cannabis strain grows rapidly in the vegetative stage, has a very potent effect and can deliver very heavy yields of frosty cannabis nuggets in as few as 12 weeks from seed to harvest.

Growing this legendary strain could not be easier. She is suited for both indoor and outdoor cultivation however the best MK-Ultra samples are ones, which were grown indoors using an organic setup with high-power LED lighting. Indoor yields for this strain exceed 350 g/m2 after a short 8 – 9 week flowering period, the end of which sees her flowers and leaves turning purple. Winner of multiple High Times Cannabis Cups, when you germinate a pack of MK-Ultra you can rest assured that you’ve taken the first step to grow a champion. Here is some further information to help you grow this strain:

  • Medium height – this strain reaches a final height of 100 – 120 cm indoors and outdoors.
  • Max EC of water – 1.4 in veg, up to 1.8 during flower.
  • Water pH; 5.8 – 6.0
  • Recommended lighting: 600 W HPS
  • Recommended nutrients: Advanced Nutrients pH Perfect Connoisseur Bloom Part A&B.

Mind-bending Effect

In addition to having a name, which is synonymous with LSD, MK-Ultra has a stunning visual appearance. Depending on phenotype, she tends to grow large, chunky, purple flowers covered in a layer of white resin which turns golden when she’s ready for harvest. Her effect is body-heavy but can often leave you mentally relaxed.


  • Brand

    AKA seed bank. They create and preserve cannabis genetics, then we get them to you.

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    T.H. Seeds
  • Type of seeds

    Regular or feminized. Pick feminized if you want female plants only.

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  • Type of seeds

    Either autoflowering or photoperiod. Both have their pros and cons, but growing autos is easier.

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  • Suitable for growing

    This strain is perfect for growing both indoors and outdoors.

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    Indoor, Outdoor
  • Effect *

    Each strain produces a certain effect on your body. This is what you can expect from this variety.

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    Cloud of positivity
  • Genetics

    Genetic composition of the strain. Shows parent strains that were used to create this particular variety.

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    G13 x OG Kush
  • Awards

    Exceptional strains receive awards from the industry. If a strain has awards to its name, it's a sign for you to try it.

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    Multiple Cup winner
  • Height

    This is how tall the plant can become. Use this info when planning your grow space.

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    100 - 120 cm
  • Harvest

    This is how much bud you can get from this variety come harvest time.

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    350+ g/m² indoors
  • Indoor flowering time

    The length of the flowering stage for photoperiod strains, or seed-to-harvest time for autoflowers.

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    56 - 63 days
  • % Sativa/ Indica/ Ruderalis

    The ratio of Sativa/Indica/Ruderalis in this particular variety.

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    Indica dominant

*Herbies sells cannabis seeds exclusively as souvenirs that aren’t meant for cultivation or germination. Customers should be aware that the germination of cannabis seeds is illegal in most countries. Herbies sells cannabis seeds exclusively for collecting and preservation for future generations. We advise customers to check with their local laws before germination, as Herbies does not accept responsibility for the illegal use of our products.

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