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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....

                                                                                      $9.36
                                                                                      $10.40
                                                                                      You Save:  10.00%
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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...

                                                                                      $2.95
                                                                                      $3.28
                                                                                      You Save:  10.00%
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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 am...

                                                                                      $7.46
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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 powerf...

                                                                                      $8.89
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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...

                                                                                      $9.10
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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...

                                                                                      $4.87
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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...

                                                                                      $6.26
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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....

                                                                                      $13.59
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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...

                                                                                      $6.40
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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)....

                                                                                      $7.95
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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...

                                                                                      $8.77
                                                                                      $10.32
                                                                                      You Save:  15.00%
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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...

                                                                                      $6.90
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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....

                                                                                      $2.32
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                                                                                      Gorilla Breath - Humboldt Seed Organisation

                                                                                      Gorilla Breath seeds' parents are the famous GG4 and OGKB clone, so there's a lot to be happy about here. The resulting hybrid is a stunning marijuana plant tha...

                                                                                      $34.72
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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....

                                                                                      $6.65
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                                                                                      Pineapple Chunk - Barneys Farm Seeds

                                                                                      PINEAPPLE CHUNK™ was created by crossing “Barney’s Farm” Sweet Pineapple with our Cheese/Skunk #1 - breeding into this new variety the essence and flavour of th...

                                                                                      $7.91
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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 fa...

                                                                                      $9.10
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                                                                                      Blue Cheese - Barneys Farm Seeds

                                                                                      This strain of BLUE CHEESE™ is one of the best and strongest on the market, and is guaranteed to knock your head off. This is an easy to grow strain, which crea...

                                                                                      $8.89
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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...

                                                                                      $14.99
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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...

                                                                                      $10.77
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                                                                                      The Incredible Bulk - Dr Krippling Seeds

                                                                                      Almost impossible to hurt this plant – it can take a huge range of ph / nutrient fluctuations, withstands extremes in heat and moisture, and joyfully devours an...

                                                                                      $10.22
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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....

                                                                                      $7.02
                                                                                      $8.26
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                                                                                      Canadian Kush - Medical Seeds

                                                                                      The aroma of the plant reminiscent pine and has an earthy flavor with hints of grape that is unmistakable. We recommend organic farming to maximize the aroma an...

                                                                                      $10.36
                                                                                      $12.19
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                                                                                      Gelato - Blackskull Seeds

                                                                                      We are super excited to add the world-famous strain Gelato to our collection of connoisseur genetics. Gelato is one of the ground-breaking new strains that have...

                                                                                      $7.73
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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...

                                                                                      $8.91
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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...

                                                                                      $13.17
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                                                                                      Blue Dream - Humboldt Seed Organisation

                                                                                      This cross of Blueberry and Haze is known for its very pleasant fruity- tangy- earthy taste, blue color, and strong and lasting, mixed mind and body high. The h...

                                                                                      $33.53
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                                                                                      Zkittlez - Original Sensible Seeds

                                                                                      American genetics at their best and made available in feminized seed form by Original Sensible Seeds. Zkittlez was created by crossing an outstanding Afghan Kus...

                                                                                      $12.19
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                                                                                      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...

                                                                                      $6.57
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                                                                                      Jack Herer - Sensi Seeds

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

                                                                                      $21.54
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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...

                                                                                      $6.60
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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...

                                                                                      $1.70
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                                                                                      1024 - Medical Seeds

                                                                                      We are proud of this cross. 1024 combines all: taste, production, presence is the perfect plant. It fits perfectly to all cropping systems (organic coconut, hyd...

                                                                                      $11.16
                                                                                      $13.13
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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!...

                                                                                      $4.24
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                                                                                      Northern Lights - Sensi Seeds

                                                                                      Northern Lights is compact, fast and very dense, capable of producing several generous, trouble-free crops per year from seed or clone....

                                                                                      $15.83
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                                                                                      Bruce Banner - Blackskull Seeds

                                                                                      Blackskull’s Bruce Banner Strain is so powerfully relaxing it could even tame Incredible Hulk! This Sativa dominant (60:40 sativa/indica ratio) variety provides...

                                                                                      $7.73
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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...

                                                                                      $3.28
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                                                                                      Royal Thai - Spliff Seeds

                                                                                      80% Sativa. Genotype: Early Thai x Skunk no.1. Overall aroma sweetish chocolate with a hint of roasted coffee. The taste is tangy and citrusy with a wonderful...

                                                                                      $2.09
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                                                                                      Blueberry - Dutch Passion Seeds

                                                                                      Dutch Passion Blueberry is the original, a famously classy and enjoyable cannabis combined with fruity flavours and blue colourations in the leaves and buds. Th...

                                                                                      $9.03
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                                                                                      Hindu Kush - Sensi Seeds

                                                                                      Flowering is strong and reliable, producing fast harvests of thick Afghani buds even in the hands of a novice grower....

                                                                                      $4.77
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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...

                                                                                      $10.77
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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...

                                                                                      $7.20
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                                                                                      2 Pounder - Kiwi Seeds

                                                                                      Add to this more than satisfying yield, vigorous growth, extreme mould resistance, and a great sativa taste and you have the perfect outdoor cropper, that with...

                                                                                      $6.86
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                                                                                      Northern Light - Nirvana Seeds

                                                                                      With its high flower-to-leaf ratio, compact buds, good yields and exceptional resin production....

                                                                                      $6.57
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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...

                                                                                      $8.50
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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...

                                                                                      $3.16
                                                                                      $3.72
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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...

                                                                                      $6.64
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                                                                                      Wild Thailand - World of Seeds

                                                                                      A pure strain from the Ko Chang archipelago in Thailand, her THC levels are among the highest in the world. She’s highly prized by Thai growers who smuggle her...

                                                                                      $2.91
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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...

                                                                                      $5.02
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                                                                                      Durban Poison - Dutch Passion Seeds

                                                                                      Dutch Passion original Durban Poison is a classic outdoor and indoor variety, tough enough for outdoor growing in extreme Northern/Southern latitudes. She was...

                                                                                      $5.89
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                                                                                      Last Updated Was Exactly: Wednesday, 19 December 2018 11:22
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