Serious Seeds is one of the longest established seed-companies in Holland, concentrating on the production of high-quality, stable and consistent varieties of cannabis seeds.
The production of top quality cannabis-strains for medical and recreational purposes are our highest priority.
Independent and reliable lab tests (over 20 years of experience in this field) have shown that the different Serious Seeds strains produce the strongest plants (highest in THC-content) available on the market today, averaging between 18-22% THC.
These tests were done on plants grown from the same seeds as the customer receives.
For most of our strains, stable plants are crossed to produce the vigorous F1-hybrids that we sell.
You can be assured of good germination and uniform plants, we even guarantee the germination of our seeds.
Serious Seeds are produced in small numbers and are always fresh and hand selected. We test every batch of seeds for germination rate and uniformity of the resulting plants before releasing it.
We are the ONLY company to individually number our packages, so every seed can be followed from production to the point-of-sale in the shop.
KEEP THE ORIGINAL PACKAGE WITH THE INDIVIDUAL NUMBER ON IT after you buy the seeds, if any quality-problems occur and we can identify the pack as an original Serious Seeds pack, we will send you a new package for FREE!
AK47 6 female seeds - £74.99
Best sativa 2nd place HTCC 1999 Best Indica 2nd place HTCC 2003 1st Highlife Cup Barcelona 1st place Sativa Treating-Yourself Expo 2010
This easy to grow plant is one of the most popular. It is of medium height and produces good yields quite quickly. Extremely STRONG odor and smoke. Take extra care for odor control when growing near neighbours. The name was given not out of any idea of violence, but more in association with the ‘one hit wonder’ that the smoke is. Quality without compromise makes AK suitable for commercial grows or home use. These plants have a short flowering period for a sativa, producing compact, not too leafy buds that gleam with a coat of resin crystals.
Type: Mostly sativa Indoor clone grow time: 5 - 10 days Indoor flowering time: 53 - 63 days Indoor yield: 350-500 grams/m2 Outside/ Greenhouse harvest time: 15-31 October
BIDDY EARLY 6 female seeds - £36.99
Biddy Early is a Sativa-dominant strain ideally suited for growing outdoors in the UK and Western Europe. This fast growing and maturing strain has high mould resistant properties making it a perfect choice for growing outdoors in the damp and short summers of the British Isles. Biddy Early was originally developed by Magnus Genetics as a cross between Warlock and Early Skunk. Serious Seeds has since taken over the propagation and seeding of this vigorous high-yielding strain. Prized for its effects when smoked, this potent Sativa (15% to 18% THC content) delivers great soaring highs and has been claimed by experienced growers to be the best they have ever smoked. With a short flowering cycle of 8 to 9 weeks. Biddy Early can be harvested ion mid-September to early October. The strain can grow up to 2 metres in height outdoors delivering 500 to 700 grams of bud that are described to have a mix of earthy scent and sweet taste. Biddy Early also grows well indoors and can be kept to a manageable size through pruning.
Type: F1 Hybrid, Mostly Sativa Height: 190 cm Recommended Veg. Time Seedlings: 14 - 21 Days Indoor Flowering: 50 - 60 Days Indoor Yield: 300 - 400 gr/m2 Outdoor Harvest: Late September / Early October
BUBBLEGUM 6 female seeds - £69.99
Bubble Gum is a medium tall, usually not too branchy (sometimes stretchy) plant, producing compact, crystal covered buds. Originally the Bubble Gum was developed by growers in Indiana, USA. From there the genetics moved to New England and eventually Holland. It took many generations to finally produce this stable Bubble Gum, with the characteristic, sweet smell (truly resembling a typical bubble gum taste) and euphoric high; the original trademarks of this famous strain. The only inbred strain (no F1 hybrid) in the Serious menu of 1994, 1995 and again in 1999.
Type: sativa/indica hybrid Indoor clone grow time: 7 - 14 days Indoor flowering time: 56- 63 days Indoor yield:300- 450 grams/m2 Outside/ Greenhouse harvest time; 15-31 October
CHRONIC 6 female seeds - £69.99
3rd Place HTCC 1994
Our most commercial variety, this medium height, not too dense plant is the perfect combination of good yield and excellent quality. Smokers that know and grow choose this plant for its combination of appearance and sweet smell. With its indica background Chronic can produce up to 600 g/m2 without losing that connoisseur feeling. Grows a single huge central bud with few side branches. Do not top plants to encourage multiple big buds, as this strain does not respond well. Mild, sweet smell develops while flowering, take care to dry thoroughly after harvest (before packaging) to maintain this subtle fragrance. 3rd prize High Times Cannabis Cup 1994, improved in 2000. Of our strains, this is the best choice for growers tired of losing quality when increasing yield.
Type: sativa/indica hybrid Indoor clone grow time: 5 - 10 days Indoor flowering time: 56-63 days Indoor yield: 350 - 600 grams/m2 Outside/Greenhouse harvest time: 15-31 October
DOUBLE DUTCH 6 female seeds - £69.99
3rd place Highlife Cup Outdoor 2006 1st place ICMag Growers Cup 2007 2nd place ICMag Breeders Cup 2007
Double Dutch is a cross between a Warlock male and a (Serious) Chronic. During vegetative growth, Double Dutch shows its Indica side with its wide leaves, heavy stem, and a bushy growth pattern. In the flowering stage Double Dutch produces giant Sativa-like buds, like its mother; the Chronic. All tips that receive enough light will form huge buds similar to elongated popcorn balls. Double Dutch buds must be staked due to their heavy weight. Performs well in bio, coco and hydro mediums. The Double Dutch aroma is a pleasant fruity wildflower scent. The effect is complex and strong; the cerebral high and pleasant bodily effect gave this plant several awards. In combination with its high yield a must trie for all serious' growers.
Type: F1 hybrid, mostly Indica Recommended clone grow time: 7-14 days Recommended veg. time seedlings: ~35 days Indoor flowering time: 55-65 days Indoor yield: 500 gr./m2 or more Outdoor harvest time (Holland): October
6 female seeds - £64.99
Two legends were crossed to produce this strain. We combined our famous Warlock-father with our legendary AK-47-mother and the result gave us pure happiness! In fact this hybrid brings happiness TWICE. First you will be happy about how easy to grow she is. Serious Happiness has the perfect hybrid-structure for indoor growing with several side branches not too close together. In flowering each branch grows a very big and dense bud with few leaves, she is easy to manicure! Her aroma and taste are sweet and fruity, sometimes a bit spicy, with a sugary aftertaste when smoked. That is the moment when she gives pure happiness for the second time. Her effect is a long lasting buzz that combines a nice body-stoned with an incredible head-high, we felt this as pure bliss. The name Serious Happiness came up after smoking this fantastic strain, because that’s exactly how the grower feels, happy while she grows and seriously happy when she is finished.
Cannabis Cup first prize in 1995 (Hydro Cup) Seed Company Sativa Cup Winner in 2000
Arguably the top sativa strain available today. With 90% sativa genetices, Kali Mist grows into tall, running, classically sativa plants with very few leaves. This strain produces dense clusters of full fluffy buds, producing much higher yields than you would expect. The plant structure and few leaves allow the light to pass all the way to lower branches, allowing bottom buds to develop fully. When planted outside early in the year this plant can grow very tall. Expect spiraling flowers with a high resin content and a delightfully spicy scent.Kali Mist is often the choice of experts for their own stash grows. Also, particularly woman seem to like this strain, next to the sheer pleasure of smoking it, we received several reports that it works great against menstrual cramps.We are proud to announce that Kali Mist was improved in 2000 to produce bigger yields. In Spain it proved to be very mold resistent, even outside during bad weather. This strain has flavor and subtle cerebral effect that gave it a Cannabis Cup first prize in 1995 (Hydro Cup) and again (with this new and improved version) in 2000 (Seed Company Sativa Cup)! Without a doubt the choice for connoisseur stash.
Type: sativa Indoor clone grow time: 1 - 5 days Indoor flowering time: 70 -90 days Indoor yield: 300- 500 grams/m2 Outside/ Greenhouse harvest time; November
MOTIVATION 6 female seeds - £69.99
1st place ICMag growers cup 2005 2nd place Highlife Cup 2008
This short/squad Indica plant is the final creation of a long process. In the parental lines are older plants 'Starwarz' & 'Medizin Power' fused into this ideal indoor plant. A thick layer of resin glands on the flowers and single leaves, makes manucuring less necessary, and gives her a popular presence in every grow room. Excellent for indoor and closet rooms with limited height. A powerful aroma, sweet with undertones reminding of fresh paint, developes during flowering. The effect is an overwhelming body stonedness, nailing you to the couch while your mind is fueled with creative ideas. Executing them however will have to wait till the effects wear off. Any 'boring' feelings will fall away after a hit of 'Motavation'! Medicinal plant!
Type: F1 hybrid, mostly Indica Recommended veg. time clones: 10-14 days Recommended veg. time seedlings: 35-40 days Indoor flowering period: 50-60 days Indoor yield: 300-500 gr./m2 Outdoor harvest time(Holland): October
6 female seeds - £69.99
Serious 6 was created by mixing genetics from Canada with Sativa-landraces from Africa through a long process of selection and cross-breeding. We wanted to create a strain, which is very mold-resistant and will finish EARLY outdoors in a humid and cold climate at the end of September. Outdoors she grows tall and slender with full buds with very few small leaves and a particularly thick layer of cristals. Half of the plants will show beautiful pink pistils. At the end of flowering these pink colors are substituted by purple colors of the calyxes and leaves. The Serious 6 is an almost pure Sativa with a very short flowering time, which also gives amazing results indoors. She will fill up and produce dense long buds glistening with trichomes. The aroma of Serious 6 cannot be compared to other cannabis varieties, it is built up in layers; citric, anise, spicy are only a few of the recognizable aromas. Her effect is a cristal clear head-high, which will get you active and creative. At the Spannabis 2013 an indoor bud was tested at the CANNA-lab with 17% THC, that was the highest measured THC-content of ALL strains tested that day!
Awards: 2 awards Type: F1-hybrid, almost pure Sativa Recommended veg. time seedlings: 3-(4) weeks Indoor flowering time: 55 - 60 days Indoor yield: 400 - 550 gr/m2 Outdoor/Greenhouse harvest time: End of September
WARLOCK 6 female seeds - £49.99
3rd place High Times Cup Bio 1997
Although indica dominant, this plant really combines some of the best Indica and Sativa characteristics. Short and bushy during veg, but grows huge compact buds with few leaves in flowering. Few medium sized leaves with a massive amount of flowers make it easy to manicure. The clear white pistils change to a tan/pinkish colour when ripe. Strong sweet smell with a tinge of sour, reminds of fresh fruits. The effect is a strong high, more felt in the head than in the body.
Type: mostly Indica hybrid Recommended veg. time cuttings: 7-14 days Recommended veg. time seedlings: ~35 days Indoor flowering period: 55/60 days Indoor yield: 400/500 gr./m2 Outdoor harvest time (Holland): November
WHITE RUSSIAN 6 female seeds - £69.99
Overall Cannabis Cup Winner in 1996 Best Bio Grass Cup Winner in 1997
These seeds produce plants that are fantastic in both appearance, and effect. Our most typically indica strain, White Russian is a stable cross of AK-47 and White Widow (a prize winning indica clone). Medium height, consistent plants and dense, very resinous flower tops (crystals appear after about 5 weeks of flowering). With such a strong indica background, the plants smell quite strong during both their growth and flowering period. In an independent seed comparison in which over 150 different seedstrains were grown out in a greenhouse, the White Russian came out as the strongest plant (22% THC, likely to be the strongest plant known at present!!). Winner of the overall Cannabis Cup in 1996 and of the Cup for Best Bio Grass in 1997. The plants yield very powerful buds, coated with resin.
Type: mostly indica Indoor clone grow time: 5 – 10 days Indoor flowering time: 56- 63 days Indoor yield: 350-500 grams/m2 Outside/ Greenhouse harvest time; 15-31 October
WHITE RUSSIAN (auto) 6 female seeds - £49.99
Serious Seeds White Russian #1 Auto variety is not perfect yet, the quality of the final product may surprise you. A quite uniform final heigth of 70 to 90 cm is normal, but factors like the strength of light a plant receives, or growing in small pots can influence the height a lot. Auto-flowering White Russian #1 is not 100% uniform yet. Some plants have an open bud structure and will yield less, but most plants grow more compact buds and yield 10 to 20 grams or more. The more light they receive during their life, the better the end result will be. All plants will be beautifully covered in a layer of trichomes. Most plants will finish between 70-75 days while some need a little longer, up to 80 days. Outside in Holland during lasting periods of bad weather there was evidence the leaves of plants may show spots of powdery mildew when they are almost ready. This can lead to bud rot, especially if wet conditions maintain. It is a good idea to check them daily under these conditions. If during rainy weather harvest time approaches; check for signs of fungus and cut them rather early than late. Serious Seeds hope to improve this variety even more over time, but the taste and potency of Autoflowering White Russian #1 is so satisfactory that they decided to put it on the Serious' menu.
Under Section 6 of the UK Misuse of Drugs Act 1971 it is an offence to cultivate any plant of the genus Cannabis in the UK without a license from the Secretary of State. All seeds are sold as souvenirs only. Due to the fact that some countries legally allow growing of hemp seeds some specifics are documented. This data is normally distributed via the World Wide Web and is available internationally. It is supplied to us by the breeder. Birmingham Seeds Bank can accept no responsibility if you choose to break the law. Please don't.