Genetics play a critical role within the cultivation of cannabis, and thereafter during the consumption phase - dictating both the flavor and smell. 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 new strains each year it is not uncommon to find unstable genetics. These are strains which may feature a higher rate of hermaphrodite appearances due to the weaker and vulnerable genetics.

By using a reputable seed company, you will get the most potential out of your cannabis plants, and avoid unnecessary hardships. For these companies, their reputations are on the line. This leads to multiple rounds of quality assurance before a strain ever makes it to retail sale - even if it means a delay. Take a look at the top 150 marijuana seed companies found below - click into a company to learn more about the seeds and strains that they offer.

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Top Dawg Seeds is a company that produces top-quality and elite cannabis genetics for real enjoyment. Top Dawg Seeds started the history in 1999 in New York City. And the founder was getting the flower since 1992. Top Dawg Seeds foun..

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Flash Seeds is the new quality seed bank located in Valencia Spain. The Flash cannabis seed breeders are exclusively professional with several years of experience in Auto flowering cannabis seeds. The breeder working for Flash Seeds ..

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ACE Seeds is a group of breeders and cannabis lovers faithful to the safekeeping and studding of this great plant. It  wants to improve the failure of genetic variation  and set back the endogenous depression that Cannabis strains..

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The Real Seed Company is a group of collectors focused on traditional cannabis strains. It was founded in 2007. The Real Seed Company specialises in heritage strains from Asia, the original homeland of cannabis. It has varieties from..

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Connoisseur Genetics is a cannabis breeder that was founded in Amsterdam. Its collection contains strains that based on the outstanding genetics with a lot of awards and wins. The company produces the best cannabis seeds for true exp..

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Crockett Family Farms is a cannabis breeder that produces the 3rd generation strains. The company is a good friend of famous Don and Aaron of DNA Genetics. It creates top quality genetics with great medicine properties. All strains ..

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R-kiem seeds is a cannabis breeder from Spain and the result of collaboration of growers, breeders and geneticists from all over the world. The company was founded in 1998. The main R-Kiem's goal is keeping and saving the best mariju..

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Anesia Seedbank develops very powerful, unique and productive genetics and delivers it to the cannabis market. The company uses  hundreds of different varieties from more than 25 countries. Anesia Seedbank is searching and ..

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Ripper Seeds is a Spanish seedbank that was born in Barcelona in 2011 after years of experimenting with cannabis cultivation and selecting a gene pool consisting of more than 40 varieties. Ripper Seeds has a relatively small, but ver..

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Reserva Privada is a separation of DNA Genetics. It includes a proficient group of breeders from the West Coast of America, who demonstrate their rare strains. The rarity of their strains  means that limited numbers can be produced...

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Speed Seeds comes from sunny Spain. This breeder provides the big collection of feminized autoflowering cannabis seeds. The company has a great reputation for its quality and excellence. The seedbank has the 20 years success on ..

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The breeder started and founded this brand based on a simple idea and a desire to produce medical, recreational cannabis and the best genetics in the planet. The first cross Gold x Shiva Shanti was created in 1998. Since then it..

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Professor P and Dynasty Genetics has 20 years of experience in selecting and hard working to provide stable, medicinal cannabis strains. The main selection criterions are vigor, yield, smell, taste, stability and resistance. Dynasty ..

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GG Strains is  the original breeder of famous Gorilla Glue Glue #1 #4 #5 Josey Whales and Lone Watie are parents of GG Strains. GG Strains learns  medical cannabis cultivation and breeds marijuana! The breeder is a winner of worl..

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French Touch Seeds is a cannabis seedbank that was founded in 2010 to save the rare french elite clones and also any interesting strain especially the landraces from the French islands. The production is based on the simple elements ..

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Spanish seed bank Eva Seeds produces stable feminized seeds with great taste, yield and quality. These seeds easily grown, they give high harvest and have a more than affordable price, that's why it is perfect for any grower. Through..

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The White Label Seed Bank propose the opportunity to economically buy the most popular cannabis strains available today. White Label Seeds is a sister company of Sensi Seeds. It  show  carefully selected variations of cannabis str..

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 ILGM was founded by Robert Bergman who began his career with home-based grow projects and eventually moved on to industrial size developing and production of own genetics. In 2012 Robert Bergman and his friends starte..

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00 Seeds Bank is a new spanish breeder of marijuana seeds, that offers autoflowering and feminized seeds. It offers a range of  high quality feminized seeds using the best marijuana genetics.00 Seeds are specialists in fine feminize..

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Autoflower-Portal is a group of friends that produces unique medical autoflowering cannabis genetics. All medical varieties are tested by patients with different deseases. Their reviews help in the selection ans creating process. The..

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Feminised Seeds spares no expense when creating the world's most sought-after cannabis seeds, and it shows. Grab one of these 100% feminized seeds for the utmost in stability, uniformity & jaw-locking power. T..

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Zenseeds is the first and one of the biggest breeders in Denmark. It was founded in 2005. The seedbank provides the wide and exclusive cannabis collection. It delivers top-quality strains and promotes world-famous genetics such as OG..

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Dungeons Vault Genetics is a quite new cannabis breeder that has previously worked with Granddaddy Purple therefore it has wealth experience in the industry. The strict breeding process guarantees the finest and most stable genetics...

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The Tropical Seeds Company's goal is preserving and maintaining the diversity of Cannabis Sativa L in a world where the local genetics are being lost. All the seeds are produced organically in small batches which are kept in the best..