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                                                                                      12/12 Photoperiod Cannabis Seeds


                                                                                      If you’re new to cannabis seed collecting, you’ll need to start with learning the difference between 12/12 photoperiod cannabis seeds and autoflowering cannabis seeds. Whereas auto seeds have been bred in a way that means they will automatically begin to flower after a certain amount of time, photoperiod seeds rely on a change in light cycles in order to ‘know’ when to flower. Photoperiod marijuana seeds tend to rely on a 12/12 cycle of lighting, with 12 hours on and 12 hours off – hence the name! The benefits to collecting 12/12 photoperiod marijuana seeds include being able to add feminised or regular seeds that are known for being cloneable, high-yielding, and generally of a higher value to your collection.

                                                                                      Here at Seed City you’ll find a huge choice of photoperiod cannabis seeds to choose from, including famous favourites such as AK 47, THC Bomb, Euforia, LSD, Purple Haze, and more! With our price match guarantee you’ll get your photoperiod weed seeds at the lowest prices anywhere online!


                                                                                      View all 12/12 Photoperiod Cannabis Seeds

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                                                                                      AK 47 - Serious Seeds

                                                                                      This easy to grow plant is our most popular, because of her outstanding quality. AK-47 has been often copied or used by other seed companies for crosses....

                                                                                      £7.42
                                                                                      £8.24
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                                                                                      Purple Haze - Positronic Seeds

                                                                                      A heady aroma from incense and cinnamon, slightly acidic, very peculiar. A revolution even before the legendary skunk....

                                                                                      £9.69
                                                                                      £10.77
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                                                                                      LSD - Barneys Farm Seeds

                                                                                      LSD is a hardy mould and disease resistant plant that responds well to all growing conditions. It was given its name by the Barney’s crew because of its powerfu...

                                                                                      £7.74
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                                                                                      White Russian - Serious Seeds

                                                                                      These seeds produce strong, healthy, fast growing plants that are fantastic in appearance and effect. Very popular also for outdoor growing in Spain, France, It...

                                                                                      £7.06
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                                                                                      OG Kush - Dinafem Seeds

                                                                                      OG Kush cannabis seeds by Dinafem Seeds belong to a feminized Indica-dominant cannabis strain that results from the cross between a Lemon Thai/Pakistani and a C...

                                                                                      £8.54
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                                                                                      Acapulco Gold - Barneys Farm Seeds

                                                                                      Barneys Farm are continually pushing the limits of marijuana genetics, improving their selection and breeding processes to create something that is truly breath...

                                                                                      £6.01
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                                                                                      Super Lemon Haze - Green House Seeds

                                                                                      Lemon Skunk x Super Silver Haze. A very citrus-like haze, works fast and lasts long. It is a very powerful high, very balanced between a physical and a cerebra...

                                                                                      £7.51
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                                                                                      White Kush - Kush Cannabis Seeds

                                                                                      This pairing is a real heavy hitter both in yield and effect, heavy buds coated in a thick white resin, you will find the widow will give you plenty of frosty l...

                                                                                      £7.91
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                                                                                      Frisian Duck - Dutch Passion Seeds

                                                                                      Frisian Duck grows with unusually shaped leaves making it difficult to identify as traditional cannabis and ideal for outdoor and greenhouse growing in populate...

                                                                                      £8.18
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                                                                                      White Widow - Dinafem Seeds

                                                                                      White Widow cannabis seeds by Dinafem Seeds belong to a feminized, Indica-dominant cannabis strain that results from a 1997 White Widow elite clone. This legend...

                                                                                      £8.54
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                                                                                      Critical Kush - Barneys Farm Seeds

                                                                                      Critical Kush comes from a blend of the famous Critical Mass with our own OG Kush. This is an extremely vigorous and powerful Indica plant which yields huge amo...

                                                                                      £6.50
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                                                                                      Gorilla Bomb - Bomb Seeds

                                                                                      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 a...

                                                                                      £5.17
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                                                                                      Amnesia Haze - Royal Queen Seeds

                                                                                      After the haze genetics came to Holland and several hybrids were made, an American expat would later combine one of these hybrids with a male derived from old s...

                                                                                      £6.95
                                                                                      £8.18
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                                                                                      Sorbet Collection - Gelato Sorbet - DNA Genetics Seeds

                                                                                      Gelato Sorbet produces vibrant, colourful, resinous buds that ooze in a fruity dank flavour profile....

                                                                                      £14.99
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                                                                                      Frisian Dew - Dutch Passion Seeds

                                                                                      The most beautiful outdoor variety we have ever encountered. A Super Skunk female x Purple Star male, seen after 3 years of selecting clones. Although we produc...

                                                                                      £7.09
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                                                                                      THC Bomb - Bomb Seeds

                                                                                      THC Bomb has very high levels of THC, well over 20% when grown under optimum conditions. When ready to harvest the plant will literally be covered in frosty whi...

                                                                                      £2.71
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                                                                                      O.G. Kush - Royal Queen Seeds

                                                                                      OG Kush is loved by many. The most obvious trait of OG Kush is its strong, unique, very dank, slightly citrus aroma....

                                                                                      £5.57
                                                                                      £6.55
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                                                                                      White Widow - Nirvana Seeds

                                                                                      In the mid-1990s, a marijuana legend was born. Almost overnight, White Widow appeared on the menu of just about every coffeeshop in the Netherlands....

                                                                                      £1.84
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                                                                                      Tutankhamon - Pyramid Seeds

                                                                                      AK-47 selection, this variety has one of the highest percentages of THC in the market (Analyzed in the 2011 Barcelona Energy Spannabis control)....

                                                                                      £6.30
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                                                                                      Moby Dick - Dinafem Seeds

                                                                                      Moby Dick cannabis seeds by Dinafem Seeds belong to a feminized, Sativa-dominant cannabis strain that results from the cross between a Haze and a White Widow. T...

                                                                                      £11.88
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                                                                                      King Mamba - Cali Kush Farms

                                                                                      King Mamba is a heavy yielding Kush with that typical LA OG Terp profile. Bred for yields and the typical west coast quality, King Mamba is sure to be a strain...

                                                                                      £6.47
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                                                                                      Afghan Skunk - Advanced Seeds

                                                                                      Hybrid Indica / Sativa. Very robust and highly productive plant, with large, dense buds. Its scent and flavor are very powerful due to their Skunk genetic.Adver...

                                                                                      £5.26
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                                                                                      Euforia - Dutch Passion Seeds

                                                                                      Euforia is a special strain that came from our Skunk breeding program in 1996, That program gave us a rich Skunk family including the original Skunk #1, Skunk#1...

                                                                                      £5.33
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                                                                                      Sorbet Collection - Strawberry Sorbet - DNA Genetics Seeds

                                                                                      Strawberry Sorbet inherits an intense sweet candy flavoured profile that produces fast flowering, resinous plants. She is a very heavy feeder, resulting in abov...

                                                                                      £14.99
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                                                                                      Liberty Haze - Barneys Farm Seeds

                                                                                      Liberty Haze is a strain created from a crossing of G13 with a fast flowering ChemDawg 91. This strain has both Indica and Sativa characteristics, and has a fas...

                                                                                      £7.92
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                                                                                      Purple Bud - White Label Seeds

                                                                                      This is a high-potency, heavy-yielding feminized Afghani with a hint of Sativa and a strong purple tendency. Purple Bud is easy for beginners, and will flourish...

                                                                                      £4.14
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                                                                                      Gorilla Glue #4 - Expert Seeds

                                                                                      Gorrila Glue is one of top most potent strains reaching levels of 24% THC, this strain was originally created accidental but giving great results including a fa...

                                                                                      £10.44
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                                                                                      Jack Herer - Sensi Seeds

                                                                                      The cream of the crops and perhaps the most exquisite ganja you will ever encounter....

                                                                                      £14.22
                                                                                      £17.78
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                                                                                      Spice - Mr Nice Seeds

                                                                                      Spice up your life with MRS. NICE! She is bubbling with rapid growth , well endowed and an absolute beauty as her name suggests....

                                                                                      £5.27
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                                                                                      White Widow - Ministry of Cannabis

                                                                                      White Widow is a cross between Indian and Brazilian, medium height, excellent taste with notes of fruit.The high is strong both on the mind and on the body, but...

                                                                                      £5.18
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                                                                                      Skunk #1 - Sensi Seeds

                                                                                      The strain that changed the face of cannabis culture across the world continues to amaze weed-lovers more than a quarter-century after her release!...

                                                                                      £2.80
                                                                                      £3.50
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                                                                                      Strawberry Banana Kush - Seed City Bulk Cannabis Seeds

                                                                                      Unbranded Strawberry Banana Kush Feminised Seeds. Now available in bulk quantities!...

                                                                                      £2.50
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                                                                                      Strawberry Amnesia - Dinafem Seeds

                                                                                      Strawberry Amnesia cannabis seeds by Dinafem Seeds belong to a feminized, Sativa-dominant cannabis strain obtained by crossing an Original Strawberry Cough and...

                                                                                      £8.97
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                                                                                      Sorbet Collection - Blood Orange Sorbet - DNA Genetics Seeds

                                                                                      Blood Orange Sorbet is a perfect balance of Tangie and Sorbet! Combining the best aspects of the Sorbet’s creaminess alongside the citrus explosion of Tangie, t...

                                                                                      £14.99
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                                                                                      Pink Kush - Barneys Farm Seeds

                                                                                      This stunning and highly regarded relative of OG Kush visually defies reality with her breathtaking pink and purple hues. Her flowers are dense and shimmer in t...

                                                                                      £8.63


                                                                                      AK 48 - Nirvana Seeds

                                                                                      Plants produce hard buds with an exceptional and penetrating aroma. Although AK-48 is a Cannabis Indica/Sativa hybrid, its effect tends toward the 'high' common...

                                                                                      £1.84
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                                                                                      Swazi Gold - Seeds of Africa

                                                                                      Harvested inland, in the rocky and mountainous region of Swaziland thisplant grows majestically tall and plentiful. Swazi Gold is very resilient to all weather...

                                                                                      £3.86
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                                                                                      Sorbet Collection - Bakers Delight - DNA Genetics Seeds

                                                                                      The Cookies x Sorbet or as we like to call it the "Bakers Delight" is a powerful strain that is super easy to grow with high producing yields. Bakers Delight fi...

                                                                                      £14.99
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                                                                                      Fruit Punch - Heavyweight Seeds

                                                                                      Fruit Punch is fast becoming a legend around the globe; this quickly flowering sativa dominant plant produces both big yields and the sweetest of smokes. The hi...

                                                                                      £5.96
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                                                                                      Master Kush - Spliff Seeds

                                                                                      80% Indica. Genotype: Hindu Kush xTrainwreck x Skunk No. 1. Powerful earthy Kush aroma and a lemon, sweet taste. Tight, compact buds and easy to grow. Suitable...

                                                                                      £1.66
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                                                                                      Orange Bud - Dutch Passion Seeds

                                                                                      One of the original skunk (100% skunk!) varieties and still one of the best we have ever seen. Orange Bud was selected from outstanding Skunk genetics in the...

                                                                                      £6.01
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                                                                                      KC36 - KC Brains

                                                                                      More production for every square meter! We keep the parents of this success-product as a secret. K.C. 36® is a short stocky plant that produces giant buds and i...

                                                                                      £1.35
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                                                                                      All Kush - Paradise Seeds

                                                                                      Queen of Hash… our award winning Allkush is a big yield plant that comes with a high that is dynamic and long lasting thanks to a sativa influence....

                                                                                      £8.54
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                                                                                      Lemon Haze - Royal Queen Seeds

                                                                                      Lemon Haze is a widely acclaimed marijuana strain that is sativa dominant. Popular for its characteristic fragrance, strong effects and good yield, this strain...

                                                                                      £5.57
                                                                                      £6.55
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                                                                                      White Widow - Seedsman Seeds

                                                                                      White Widow is one of the best-known, and still one of the most potent, cannabis strains in the world. Originally created in the early 1990s its release to the...

                                                                                      £3.86
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                                                                                      White Widow - Royal Queen Seeds

                                                                                      Over the years, literally thousands of marijuana strains have been discovered, bred and smoked. No strain is quite possibly more famous, more legendary, than Wh...

                                                                                      £5.11
                                                                                      £6.01
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                                                                                      Sorbet Collection - Triple Scoop - DNA Genetics Seeds

                                                                                      Indulge in a triple treat of intense flavours from Super Silver x Grape L.A x Sorbet, her lineage offers a unique blend that we have dubbed the “Triple Scoop”....

                                                                                      £14.99
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                                                                                      8 Ball Kush - Barneys Farm Seeds

                                                                                      Some of the very best hashish in the world is found between the mountainous border of Afghanistan & Pakistan. After many years of selectively inbreeding superio...

                                                                                      £5.64
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                                                                                      Special Kush #1 - Royal Queen Seeds

                                                                                      Kush is to Indica varieties what Haze means to Sativa. Much like skunk, kush is a term which can be used to describe a whole lineage of cannabis plants. We use...

                                                                                      £2.51
                                                                                      £2.95
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                                                                                      Cherry Bomb - Bomb Seeds

                                                                                      Cherry Bomb is the hard hitting, big yielding strain from Bomb Seeds. The result of crossing our monster yielding Big Bomb with a unique and fruity mother means...

                                                                                      £2.71
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                                                                                      Last Updated Was Exactly: Tuesday, 25 September 2018 16:42
                                                                                      Cannabis Seed Cart



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