Fast Autoflowering Seed Strains

Fastest autoflowering cannabis seed strains

With auto-flowering strains can you grow almost anywhere and harvest between 55 to 75 days after germinating the seeds.

lowryder autoflowering indoorWhat’s fast autoflowering cannabis and why is so popular?

Auto-flowering cannabis strains are different from most types of marijuana in that they begin to flower (produce buds) not long after germination and continue to do so throughout their life cycle.

(The original auto-flowering cannabis strains are called Ruderalis but they didn’t contain any psychoactive substances like THC so they were bred with potent Sativas and Indicas to make a whole new strain of cannabis – auto-flowering strains that will get you high!)

Most cannabis strains need equal spells of dark and light every 24 hours before they will begin to start budding. If the plants are exposed to more than 12 hours of light every 24 hours then they will continue to grow but not flower or form buds. Bummer!

Not so with auto-flowering cannabis. These suckers will start to flower a few weeks after germination and continue to flower for their short but potent life cycle.

So if you’re growing in a room that can’t be kept completely dark for at least 12 hours a day you’ll want to get auto-flowering seeds. Perfect for my buddy who grows under lights in his rec room (also for folk growing outside in urban areas with excessive light pollution).

Multiple harvest in one growing season

autoflowering feminised indoor cannabis seedsSome auto-flowering cannabis strains are also fast to grow which makes a shorter wait for harvest time. This means you can be harvesting your crop in as little as two months after germinating the seeds.

Outdoors, this means you can plant and harvest two or three crops in a summer growing season.

Indoors it means you can have at least 5 crops from seed to harvest each year.

Fast does not mean big

Now don’t expect huge 450+ gram harvests for each plant from these small but mighty strains. 30 to 120 grams harvested from each autofem seed is more likely. (For biggest harvests, see auto-flowering strains Think Different and Green-o-matic below). If you want to harvest large quantities of high-grade marijuana every two months you’ll have to grow a dozen or more of these autoflowering strains at a time!

Below is a list of the best autoflowering cannabis strains available to buy on-line in feminised seed form. Each strain below has been selected for the following qualities: speed, potency, effect, taste and popularity.


Top 3 AutoFem Sativas

Sativa-dominant dope produces an uplifting, energetic cerebral high when smoked.

Deep Purple Haze – seed to harvest in 56 days!

deep-purple-haze autofem seedsDeep Purple Haze is a Sativa-dominant autoflowering strain developed by Sumo Seeds bank.

An incredibly fast producer, Deep Purple Haze can go from seed to harvest in just 8 weeks.

With a delicious berry flavour, this stain produces an energetic cerebral high one can expect from any quality Sativa strain.

It grows well indoors and outside in high latitudes with short summers.

Expect 300 – 400 grams per sq meter of growing space. More is possible outdoors.

Deep Purple Haze grows up to a meter indoors and a little over 1 meter (120 cm) outdoors.

Some claim Deep Purple Haze is the fastest seed to harvest strain available anywhere. The perfect strain for the impatient among us 😉

Deep Purple Haze autofem seeds

3 seeds €23

deep purple haze autoflower seeds


Think Different – seed to harvest in 70 – 77 days

think different autofemThink Different Auto Fem is a predominantly Sativa super strain bred from AK47 and Ruderalis.

It’s known for producing large yields of very potent buds in very short time.

Think Different can be grown outdoors or inside. Its buds begin to develop within a month of germination and become large and sticky.

A Sativa-dominant strain, Think Different produces up to 500 grams per sq meter of grow space.

It grows up to approx. 1 meter in height.

This autofem strain produces highly potent weed with a THC content of 18%. It creates a very energetic euphoric high when smoked.

Think Different is popular for recreational use

For more information on Think Different Autoflowering feminized seeds click on the button below (packs of 1, 3 and 100 seeds are also available):

Think Different autofem seeds

1 seed €10.95

3 seeds €14.98

7 seeds €59.95

100 seeds €489

think different dutch passion fast autoflower seeds



Purple Power – seed to harvest in 65-75 days

Purple Power autofem seedsPurple Power autofem – a relative newbie from Amsterdam Marijuana Seeds – is worth a special mention. Not only because it’s a fast autoflower, but because it’s one of the best strains for growing outdoors in cooler northern climes.

A cross of Dutch Dope and Skunk, Purple Power auto is hardy enough to cope with brief cool summers of north-western Europe and Canada.

It’s also a high-yielder for an auto, with possible harvests of up to 650g per square metres outdoors. So you’ll get a sizeable mass of glorious sticky purple buds with a nice skunky smell. And a euphoric yet relaxing head trip.

For more information on Purple Power autoflowering feminized seeds click on the button below (packs of 10 and 20 seeds are also available):

Purple Power autofem seeds

5 seeds $55

10 seeds $99

20 seeds $176

purple power autoflower seeds


Top 3 AutoFem Hybrids

Hybrid cannabis strains produce a balanced Sativa/Indica effect when smoked – a cerebral high with a relaxing body stone.

Northern Lights – seed to harvest in 65 – 75 days

northern lights fast autoflowering seedsNorthern Lights is one of the most potent and famous Indica strains ever created.

Nirvana SeedsNorthern Lights has become the most popular hybrid because of its higher potency and reduced flowering time.

Highly adapted to indoor growing, Northern Lights seeds grow into high-yielding plants that can finish in around 7 – 9 weeks.

A stocky plant, Northern Lights is famous for its proliferation of dense, resiny buds which have a honeyish musky aroma when dried. It’s a fairly odourless plant when growing though, making Northern Lights automatic a good choice for guerilla growing.

Northern Lights seeds are also fairly easy to grow so a good choice for novice growers. You can expect good yields with this auto too – 200-300g per square metre of indoor grow space.

The effect when smoked is a potent body stone that’s comfortably lazy and relaxing with a mild pleasant head high to go with it.

Northern Lights autoflower seeds
Seed BankSales & DeliveryPriceOrder
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Currently not shipping to Australia & New Zealand
5 seeds $60
10 seeds $100
20 seeds $170
planet earth Worldwide delivery
Economy tracked £3.50
Express tracked £8.70
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5 seeds €25
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Free shipping
1 seed €5
3 seeds €12.50
5 seeds €19.95
10 seeds €35.01



O G Kush – seed to harvest in 65 – 80 days

o g kush fast autoflower seedsThis Nirvana Seeds OG Kush autoflower is a cross of an original OG Kush mother from Lake Tahoe (in the US Sierra Nevada) with the Northern Lights automatic.

It’s a killer combination. OG Kush autoflower seeds grow into rich-yielding plants with a dense rounded bud structure, much like that of traditional Kush strains.

Suitable for outdoor or indoor growing, OG Kush autoflower feminized seeds give a sizeable harvest of up to 350g per square metre of grow space, flowering for 7-9 weeks.

As for the effects, OG Kush automatic has a clean fruity (lime-like) aroma and gives a high that is balanced physically and mentally – a long strong body stone with a cerebral lift.

OG Kush autofem seeds

Seed BankSales & DeliveryPriceOrder
I Love Growing Marijuanaplanet earth Worldwide delivery
Free shipping for Europe & USA
Discount for bitcoin payment
5 seeds $89
10 seeds $119
20 seeds $179
EU flag European Union only
Free shipping
1 seed €8
5 seeds €20.50
10 seeds €32.50
planet earth Worldwide delivery
Economy tracked £3.50
Express tracked £8.70
Discount for bitcoin payment
5 seeds €25


Forest Fruits – seed to harvest in 70 – 80 days

forest fruits autofem seedsA  cross of New York Turbo Diesel and Blueberry 420, Forest Fruits auto is a new strain from Amsterdam Marijuana Seeds.

It can be grown inside or out will be ready to harvest after 8 weeks of flowering. And what a harvest you’ll get – up to 450g per m² indoors and up to 800g m² outside.

Forest Fruits is possiby the highest-yielding autoflower, and is a lovely smoke: a fruity flavour with a touch of Diesel, and a relaxed and fairly gentle high.

For more information on Forest Fruits autoflowering feminized seeds click on the button below (packs of 10 and 20 seeds are also available):

 Forest Fruits auto-fem seeds

5 seeds $50

forest fruits fast autoflowering seeds

Top 3 AutoFem Indicas

Indica-dominant dope produces a sedative, relaxing, chill-out body-buzz when smoked.

Lowryder (Ganja Dwarf) – seed to harvest in 55 – 65 days

lowryder ganja dwarf fastest autofloweringLowryder is the original psychoactive autoflowering strain, and Ganja Dwarf is Amsterdam Marijuana Seeds version. Other than its ruderalis genes, it’s fully Indica.

The fastest autoflowering strain there is, Lowryder / Ganja Dwarf is also the shortest (hence the name), staying under 50cm tall and thus the perfect strain for guerilla growers or anyone needing to be discreet or short on space.

With a flowering period of just 6-7 weeks, Ganja Dwarf is ready for harvest just 8 to 9 weeks after germination. It’s also a reliable strain which is easy to grow – good for novice growers.

Ganja Dwarf / Lowryder is not a particularly high-yielder – you can get around 150 grams per plant. However, it is good potent Indica bud with the effect of a stoney relaxing (narcotic-like) body-buzz characteristic.

Lowryder autofem seeds
Seed BankSales & DeliveryPriceOrder
I Love Growing Marijuanaplanet earth Worldwide delivery
Free shipping for Europe & USA
Discount for bitcoin payment
5 seeds $89
10 seeds $119
20 seeds $179
planet earth Worldwide delivery
Economy tracked £3.50
Express tracked £8.70
Discount for bitcoin payment
3 seeds €17.50
5 seeds €25
10 seeds €45
planet earth Free shipping worldwide
10% discount for Bitcoin payment
5 seeds $37.80
10 seeds $63
planet earth Free shipping worldwide
Discount for Bitcoin payment

Currently not shipping to Australia or New Zealand
5 seeds $40



Green-O-Matic – seed to harvest in 55-60 days

green-o-matic autoflowering feminised cannabis seedsGreen-O-Matic is perhaps the fastest auto-flowering strain available with an estimated harvest date only 55 to 60 days after harvest!

That record time includes two weeks of vegetative growth before beginning to flower for 5-6 weeks.

This mainly Indica strain has been developed from Moroccan and Asian strains by the Greenhouse Seed Company.

It has a sweet, spicy smell and the effect is a potent, fast-hitting, and long lasting stone when smoked.

The THC content is a substantial 15+% and it is reported to deliver 800 grams per square metre of grow space.

For more information on Green-O-Matic autoflowering feminized seeds click on the button below:

Green-O-Matic autofem seeds

3 seeds €17

5 seeds €25

10 seeds €45

green-o-matic fast autoflowering seeds


Pineapple Express – seed to harvest in 65-70 days

pineapple express weedPineapple Express autoflowering feminized is a potent Indica-dominant strain that produces awesome smelling bud in a short time.

A hybrid of White Widow x Limoncello Haze x Strawberry Ice, Pineapple Express is potent and of course, fruity in taste.

Pineapple Express auto-fem grows into a stocky and bushy plant, packed with thick large buds.

It can be harvested in as little as 9 weeks after germinating delivering 15 to 30 grams of potent sweet smoking pot per plant.

Pineapple Express is a lovely smoke – that fruity pineapple taste with a relaxing Indica body buzz – and a decent head buzz too, with roughly 18% THC content.

Since it’s high in CBD (cannabidiol) too, Pineapple Express is a good choice for growing for medical use, being especially good for stress relief.

For more information on Pineapple Express autoflowering feminized seeds click on the button below (packs of 10 and 20 seeds are also available):

Pineapple Express autofem seeds

5 seeds $50

pineapple express fast autoflowering seeds


cannabis seeds disclaimerPlease Note: In most countries, including the UK, it is legal to trade and possess auto-flowering cannabis seeds. In many countries however, it is against the law to cultivate fast autoflowering marijuana.

We provide information on auto-flowering cannabis seeds as a law-abiding service. We do not endorse the cultivation of fast autoflowering marijuana where it is illegal to do so. In jurisdictions where it is illegal to cultivate auto-flowering marijuana we provide growing information and advice purely for scientific and entertainment purposes.

Please check your local laws before germinating auto-flowering cannabis seeds.