The genetics of the cannabis seeds you plant are responsible for dictating both the speed and quality of the marijuana plant it will grow into. It even plays a role in the potency and flavor profile when the marijuana is being consumed, by affecting the quality and quantity of cannabanoids and terpenes.

Each strain of marijuana is best explored personally, to experience the different taste profiles and effects. However even within the same marijuana strain, there are large amounts of discrepancies with their genetics - and this is where the reputable seed breeding companies come into play: There are countless factors leading to the production of seeds with strong genetics and with the addition of so many new strains it has become more common to find unstable genetics. However, each year the genetics of existing strains continue to grow stronger - with the breeders doubling down and breeding out undesirable traits.

We have collected a list of contenders for the top genetics to be growing during 2020.
You can learn more about each strain by clicking into it, or browsing more information about the breeder including their complete product line.

More Seeds by Positronic
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Positronic Blue Rhino HYBRIDISATION PROCCES Blue Rhino is the result of selections among hundreds of plants, a classic creation process that guarantees one of the strongest and best hybrid that the expertest farmers asked. Blue's gen..


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More Seeds by Dr. Underground
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The study for the creation of Brooklyn Mango started looking for plants with strong smell of Mango but that in turn is a powerful structure of rock-hard buds. We started by our mother Ed Rosenthal Super Bud, selected from original se..


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More Seeds by Zambeza
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The genetic history of Blueberry can be traced back to the 1970’s, when US breeder DJ Short worked with different exotic landraces to lay the foundation for this wonderful plant. Blueberry became internationally recognized after wi..


Learn more about Blueberry Autoflowering
More Seeds by Spliff Seeds
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Orange/apricot citrus kush taste. Happy energetic high with a relaxing body stone. Tall growing kush which has sticky buds with a deep orange overtone. Excellent for depression, stress, fatigue, headaches, lack of appetite. Potential..


Learn more about Gold Bar Kush
More Seeds by Zambeza
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Zambeza’s breeders created Blueberry Cheese Autoflowering by simply crossing the already existing and well-appreciated Blueberry Cheese with Ruderalis genetics. Growers of this strain will be amazed by the wonderful attributes of W..


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More Seeds by White Label
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This is a high-potency, heavy-yielding feminized Afghani with a hint of Sativa and a strong purple tendency. Purple Bud Feminized is easy to cultivate indoors, even for beginners, and will flourish outdoors in the spring and summer o..


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More Seeds by Auto Seeds
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To create Ultra Lemon Haze we crossed the Cannabis Cup winning Lemon Haze with a select Sour Diesel developed in northern California. This was then crossed with our Auto #1 to produce a stable strain that is truly unique. These genet..


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More Seeds by Positronic
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Positronic Amnesia Mistery HIBRIDISATION Discover the mistery. AMNESIA MISTERY is a step forward in the development of the newest sativa genetics. Our best selected AMNESIA clon was crossed with a misterious male coming from the gree..


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More Seeds by ACE Seeds
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Spectacular hybrid of the mythical Purple Haze and the Meo Thai of northern Thailand. With this sativa, we have developed the characteristics of the famous Purple Haze to the extreme: tall, thin and elegant sativa with beautiful purp..


Learn more about Purple Haze Thai
More Seeds by Positronic
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Positronic Somango #47 HIBRIDISATION Somango#47 is a combination of the two plants most productive and strong we have selected for years. Is a new generation hybrid that was massively tested in colaboration with YERBA Magazine. Our w..


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More Seeds by Zambeza
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The breeders of Zambeza Seeds are true Cheese lovers, not only because of their Dutch roots. Creating one of the best-selling autoflowering varieties of Zambeza’s collection didn’t involve many experiments or countless years of s..


Learn more about White Cheese Autoflowering
More Seeds by Zambeza
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Vanilla Ice is one of Zambeza’s best-selling Indicas and truly a remarkable strain. It was created by crossing genetics of Northern Lights XL, Skunk, and Afghani. The autoflowering version is simply a crossing between the feminized..


Learn more about Vanilla Ice Autoflowering
More Seeds by Spliff Seeds
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Creamy, fresh berry aroma and strawberry flavor with Hazy undertone. Medicinal strain. Ideal for SOG. Medicinal value: anxiety and depression. Overwhelming, soaring classic Sativa high. Potential THC level high. Strawberry’s ancest..


Learn more about Spliffs Strawberry
More Seeds by KC Brains
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KC Brains KC33 is a new sativa/indica stable marijuana hybrid of Thai and Brazil males represented by K.C. Brains. She's been designed specificly for outdoor growing, but stable genes make her seeds ideal also for indoor. Being sativ..


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More Seeds by Anesia Seeds
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We are proud that we can offer Gorilla Glue # 4 as feminized Seeds. Gorilla Glue #4 is at the moment the strongest strain on earth, tested 12 times with more than 30% THC. It was created by Joesy Whales when he crossed Chem Sis with ..


Learn more about Gorilla Glue # 4
More Seeds by Zambeza
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The word synergy is a business term first quoted in the early eighties to describe mutual enhancement through interaction or cooperation, where the end result gained is greater than the sum of the parts used. What do synergy and the ..


Learn more about Crazy Cookies
More Seeds by KC Brains
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KC Brains Bahia Blackhead is a mostly sativa hybrid bred by KC Brains seed selectors. They crossed a pure Brasil and two KC 606 males and got a marijuana variety with the exquisite qualities of the Brazilian Sativa but with an earlie..


Learn more about Bahia Black Head
More Seeds by Flying Dutchmen
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Flying Dutchmen Voyager is an absolutely unique marijuana strain presented by Flying Dutchman seed industry. In this mostly sativa cannabis, the Flying Dutchman seed breeders mixed the genotypes of the strains which didn't seem to be..


Learn more about Voyager
More Seeds by Zambeza
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According to the legend, Northern Lights was originally created from 11 different seeds, by a group of West Coast breeders who later exported this genetic miracle to the Netherlands. Northern Lights conquered the cannabis world at a ..


Learn more about Northern Lights XL Autoflowering
More Seeds by Positronic
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Positronic Black Widow HYBRIDISATION PROCESS Slightly endogenous cross between excellent indica varieties. Genetic Misty has revolutionized the 80s. The origin of this variety is anonymous, however seen the high concentration of CBD ..


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More Seeds by Delta 9 labs
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The Brainstorm Haze G13 came to fruition during the selection process with the original Brainstorm Haze around the time we had acquired the male G13 cutting from our colleague Soma. We had an amazingly, full of THC glands Brainstorm ..


Learn more about Brainstorm Haze G13
More Seeds by Short Stuff
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This strain is the holy grail of auto flowering growers, a true and pure auto-Sativa and one which has been described as a SUPER AUTO by its breeder stitch. Stitch has been working for many years on refining an autoflowering haze str..


Learn more about Super Cali Haze
More Seeds by Short Stuff
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Auto Pink Grapefruit is the fruitiest lady in our auto collection with an amazing aroma and incredible production levels. Her genetic makeup includes AK47, Blueberry, Diesel and grapefruit and the result of all these elements makes f..


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More Seeds by Anesia Seeds
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Fast Caramelic is a Hybrid of Big Bud and Caramello with a marvelous sweet candy smell and a amazing flavor of caramel. This strain is bred from the worlds finest Indica genetics, developed for strong effects and a intensive taste wi..


Learn more about Fast Caramelic