Black Jack Strain

Contrary to popular belief, cheating is allowed in gambling. That is, if you are gambling with your choice of cannabis strain. Pick Black Jack and you know you picked a winner. Unlike the traditional casino game, or even an online one, our Black Jack has absolutely no misses. Every single time you use it, you get guaranteed hits.

Sativa/Indica %Indoor YieldOutdoor YieldFlowering Period
30% / 70%18-22 oz/ m218-24 ounces per plant62 to 72 days indoors, Early October outdoors.

Not only is this hybrid popular among recreational users, but Black Jack is also popular for its medicinal benefits of dealing with mental health issues and chronic pains.

For recreational use, Black Jack is a potent enough strain that gives you a mental head high with a nice balance of physical high.

Casinos have their own playing cards, and so maybe they inspired the breeders to do their own versions too.

One of the breeders, Nirvana Seeds, have their own variant of Jack Herer, which they call Jack Horror. Using this hybrid and crossing it with Black Domina, they created their own Black Jack hybrid strain.

The variant of this strain that we are featuring here, though, is one that was bred by Sensi Seeds. They crossed the Indica-dominant Black Domina with the balanced Jack Herer to create this Indica-dominant Black Jack.

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    Information about Black Jack Strain:

    ORIGINBlack Domina and Jack Herer
    EFFECTSRelaxed – 10
    Happy – 8
    Uplifted – 6
    Euphoric – 5
    Focused – 4
    Dry eyes – 6
    Dizzy – 2
    Paranoid – 1
    Anxious – 1
    FRAGRANCEEarthy, woody, pine
    FLAVORSSweet, woody, pine, citrus
    MEDICALStress – 10
    Pain – 8
    Depression – 7
    Headaches – 4
    Insomnia – 4
    PLANT HEIGHTUp to 9 feet
    THC CONTENT %14% to 24%
    CBD %0.24% to 2%
    INDICA / SATIVA %70%/30%
    INDOOR YIELD18 to 22 ounces per square meter
    OUTDOOR YIELD18 to 24 ounces per plant
    CLIMATETemperate climate
    GROWTH LEVELEasy to grow

    * 10 is the highest
    * 1 is the lowest


    Here is where we separate the exhilaration of winning Black Jack games (and money in casino) because when this strain hits you, it sends your body into a state of relaxation that makes you want to take things easy and slow. Definitely, this strain is not going to make you lethargic or lock you on your couch, unless you smoke too much.

    We don’t currently sell Black Jack seeds. Check out other indica dominant seeds in our marijuana seed bank.

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    But because it has a THC level that might reach 24%, you know this is a potent strain, and being Indica-dominant, the most profound effect it has on you is more on the physical side. Along with it comes the medical benefits, which is detailed in another section.

    Black Jack Effects
    Black Jack Effects – Image powered by

    Along with the relaxation, mentally you retain a certain level of alertness. Because of the physical relaxation and relief from certain symptoms of illness, you feel uplifted and that makes you happy, perhaps even elated.


    Most users would find the fragrance agreeable. It has an earthy and woody smell with hints of pine that grows on you. In other words, the more you smell, the more you get used to its smell, the more you love its fragrance.


    Black Jack is smooth and, unlike its smell, it doesn’t retain an earthy taste. Rather, it has a nice blend that tastes sweet and woody, with the taste of citrus and pine, which might linger a little during exhalation.

    Adverse Reaction

    No surprises on the Black Jack. Not only is it a sure winner when you take a few puffs, it also gives you what cannabis users already know, that it might leave your mouth and eyes feeling dry.

    Black Jack Adverse Reaction
    Black Jack Adverse Reaction – Image powered by

    It is rare, but it might occur, and most especially for those who overuse this strain, some users report feeling dizzy as the effects of Black Jack starts creeping in. This is typical for beginners too.

    A couple of other reactions that you want to be aware of is that this strain might cause the feeling of anxiousness increasing, which leads to paranoia. Mostly, if it does happen, it is because of the unexpected or unfamiliar sensation creeping in the body.

    Looking to buy seeds like Black Jack? Check out our marijuana seed bank.

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    With a CBD level that might reach up to 2%, Black Jack does come with medical value for those who need a way to relieve the symptoms of stress, anxiety, and other mental health concerns such as depression, or even PTSD.

    This strain is also popular for its ability to help in alleviating the pains and aches caused by certain illnesses.

    Like many other Indica-dominant strains with above average THC levels, the sedative property induces the body and muscles to relax, which in turn induces drowsiness. This is an excellent choice for dealing with insomnia.

    Download my free marijuana grow guide and start growing Black Jack Adverse strain

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      Black Jack can be grown outdoor and indoor. If you decide to grow this inside your house, be reminded that it needs ample space (and height) as it grows tall. Outdoor, this plant could grow up to 9 or even 10 feet. While it is classified as being easy to grow, it will still require a bit of maintenance and caring. It loves sunlight and it thrives well outdoor in a temperate climate. Of course, cannabis that grows large and tall might not be a good option if you are concerned about neighbors seeing what you are doing.

      Black Jack Growing
      Black Jack Growing

      Flowering Time


      Black Jack has an estimated flowering time between 62 to 72 days. It gives a better than average yield of 18 to 22 ounces per square meter. Good thing that this strain could be grown indoor because in this way, you have your privacy and in a matter of 2 months or so, you would have your own cards … sorry, we mean Black Jack hybrid strain.


      This is where this cannabis plant thrives the best. Beginning at around the ninth week, and towards the early parts of October, Black Jack can have a yield estimated to be between 18 to 24 ounces, or even more, per plant. But because this is a tall plant, sometimes, it gives the impression that its yield outdoor is low.


      1. Jack Herer
      2. black Domina

      FAQ About Black Jack Strain

      What is the Black Jack strain yield?

      Black Jack yields 18-22 oz/ m2 indoors and 18-24 ounces per plant outdoors.

      How much THC does Black Jack have?

      From 14% up to 24% THC.

      What are the origins of the Black Jack strain?

      Black Jack was created from a mix between Black Domina and Jack Herer

      Have you ever smoked or grown your own Black Jack? Please let me know what you think about this marijuana strain in the comments below.


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      Robert Bergman

      Robert Bergman is an Amsterdam-based marijuana grow expert who has years of experience from small grows to massive operations. His passion for growing led him to develop his own Gold Leaf strain. Now, Robert is dedicated to sharing his knowledge with the world.... [Read full bio]


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      • Avoid Common Grow Mistakes

        4 comments on “Black Jack Strain”

        1. Hello,

          My name is Dee and I plan to grow a couple a black Jack plants next season outdoors in a greenhouse. My question is what’s the best soil to use and any other tips i. Growing a successful crop. Thanks dee.