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 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..


Learn more about K.C. 33
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 Bomb Seeds
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One of the most talked about and arguably strongest strains of recent years, is the Insanely sticky Gorilla Glue. Huge amounts of resin and a great sour piney aroma make this a great variety to work with; so we have given it the full..


Learn more about Gorilla Bomb
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 ..


Learn more about Black Widow
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..


Learn more about Auto Pink Grapefruit
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
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
More Seeds by Anesia Seeds
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Banana Kush is an outstanding and very popular US strain. After several years of stabilization ANESIA Seeds can offer this variety now as feminized seeds.Banana Kush is a cross between a OG Kush and a Banana, a variety of Sensi Seeds..


Learn more about Banana Kush
More Seeds by Kannabia
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Kannabia Seeds Kannabia Special is another big success of Kannabia marijuana breeders. It's a stable hybrid of an Early Skunk and Uzbekistan, both are well known as the best all-round strains. Early Skunk's genes make Kannabia Specia..


Learn more about Especial Kannabia
More Seeds by Anesia Seeds
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She’s a monster in fact: Buds with countless and endless resin crystals, a extremely strong High and surprisingly big and heavy yields. Big Bazooka is a pure Indica exciting even the most experienced smokers with a powerfull high. ..


Learn more about Big Bazooka
More Seeds by Dr. Underground
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We are talking about a hybrid created exclusively for medical use, although the effects sativas seek active in this plant we have created otherwise. Designed from the demands of various medicinal growers, is one of the earliest known..


Learn more about PainKiller
More Seeds by Short Stuff
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Tha Shiznit is an Auto strain of the highest possible quality. The Urban Dictionary describes the phrase, ‘Tha Shiznit’ as ‘The greatest, the best ever, simply the shit…’ and this autoflowering strain matches up to that des..


Learn more about Tha Shiznit
More Seeds by Zambeza
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Big Bud XXL Autoflowering was created by crossing hand-selected genetics of OG Kush with Ruderalis. It took Zambeza’s breeders several years, and countless generations of plants, until their heavy-yielding autoflowering strain was ..


Learn more about Big Bud XXL Autoflowering
More Seeds by White Label
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Getting the best results from the ever-reliable Skunk family is now easier than ever with White Label’s feminized Skunk #1 Automatic strain - a new auto-flowering hybrid bred from one of the world’s favorite marijuana varieties. ..


Learn more about Skunk #1 Automatic
More Seeds by Anesia Seeds
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Iceberg is a very resinous variety that offers great yields and a enormous potency. Ansia Seeds crossed a Master Kush with a Grand Daddy Purple with huge productivity. After the most profitable cannabis plants were selected, they wer..


Learn more about Iceberg
More Seeds by Seedsman
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Seedsman Seeds White Widow is the most potent cannabis on Earth and is named for the abundance of trichomes, giving the plant a whitish tint. It is also one of the more powerful strains of marijuana (alongside AK-47 and Afghan Kush) ..


Learn more about White Widow