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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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..

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Super Strains seeds offer the highest quality genetics of cannabis seeds. The strain library allows you to view our highest yielding strains, indoor and outdoor strains and will help you choose between indica or sativa cannabis ..

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Advanced Seeds company produces all seeds by using organic farming methods. It used only natural insecticides and fertilizers. Produced under strong control in isolated rooms to ensure the identity of each of its varieties. Adva..

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Biological Seeds is a cannabis breeder that produces top-quality feminized marijuana seeds. The production process combines accuracy, intellectual approach, strict packaging control, careful handling and quick delivery. The collectio..

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Dutchfem is an original cannabis seed breeder from The Netherlands. After years of experience with growing cannabis seeds, they can offer you the highest quality cannabis strains available. With the best feminized, autoflowering and ..

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Pyramid Seeds is cannabis breeder from Spain. The goal of Pyramid Seeds is to spread feminized cannabis seeds of easy cultivation and good production with low price to growers as well as dealers in this industry. It offers new e..

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Sagarmatha Seeds' range of cannabis seeds presents mix of international genetics. Every one of these strains delivers all the flavour, twice the power and three times the effects compared to a standard seed. Mission of Sagarmatha Se..

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Growers Choice Cannabis Seeds is a seed company from North American that delivers premium cannabis seeds to the cannabis market. The team of horticultural and medical experts has collected the best cannabis genetics in the world. The..

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Bodhi Seeds are well know as a family-run business who make great effort to maintain their excellent reputation. They do this through demonstrating the quality of their product rather than slick advertising, they don't even have a we..

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Blimburn Seeds is the result of association teams from Spain with Greenguide SL. It was created over 8 years ago. All strains are unique. The main aim is to create a genetics with a good taste, a good quality production with high psy..

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Seed Stockers is a breeder from Spain that produces the best of the Spanish and Dutch cannabis seeds. It has the high quality Dutch Passion inheritance. The company uses the prize winning genetics from the famous breeders. The r..

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Hy-Pro Seeds are based in the Netherlands. It sells the best cannabis seeds from Amsterdam. One of the most successful strain is masterwork Amnesia Haze won Cup after Cup. Hy-Pro Seeds has 20 years of success and still remains in can..

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Mephisto Genetics was created only by three men. It's small company which produces the best automatic genetic for today. Mephisto Genetics†works with the greatest exclusive clones using strains from all over the world. It tries to fi..

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Cookie Fam is a group of the breeder located on the West Coast of USA. The outstanding Cherry Pie, Sunset Sherbet, and Gelato are their creations. Cookie Fam remains protective of their proprietary genetics, and for good reason given..

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The Bank Genetics collection contains the finest cannabis seeds from award winning strains from all over the world. They won many awards including High Times Cannabis Cup and THC Championship awards. The products have good reviews du..

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Ocean Grown specialises in the development of high quality medical marijuana. This is the collective of cannabis growers and experts with over 30 years’ combined experience. Each strain is hand-crafted in small packs to guarant..

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Irie Genetics Colorado is a cannabis breeding program founded by Rasta Jeff. Irie Genetics Colorado is a group of cannabis growers, breeders, and enthusiasts who are breeding marijuana with pure love. Many of their strains have teste..

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Aztech is the british cannabis seeds shop that also produces its own line of top quality marijuana genetics. Aztech is a small independent friendly team that has a goal to provide the best cannabis genetics to the market.

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PEV Grow is a seed bank that offers a wide variety of premium genetics known in Europe and America for its quality and potency. The breeder produces seeds for industrial and domestic trade.

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Purple City Genetics is an award-winning growers collective that based in, Oakland. It was founded in California in 2008. Purple City Genetics is cultivating only premium cannabis phenotypes.

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Cannabis seeds of Amsterdam Genetics known since 1985. Based in Amsterdam and believe in true quality genetics and will only deliver premium high grade seeds to our customers.

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Melvanetics Seeds is a cannabis breeder that provides careful selection and excellent results. Every seed is created with the touch of a lady and the vigor of a champion.

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Ceres Seeds are a Dutch seed company founded by a team of breeders with decades of experience working in both the Amsterdam coffee shop culture and established Dutch Seed Banks.

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Seedbank based in Canada that offers an exclusive line of genetics consisting of automatic, feminized and regular varieties.