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Top 10 Fastest Autoflowering Cannabis Seeds

quickest autoflowering strains

Are you wondering what are the fastest autoflowering cannabis seeds and where to get them? If yes, you are in the right place, because here we have covered everything you need to know from the reasons why these strains are so quick to the top 10 list. Ready to find the fastest autoflower seed to harvest? Let’s go!

What are Autoflowering Seeds and Why Are They so Fast?

Autoflowering seeds produce plants that automatically switch from the vegetative phase to the flowering stage, based on their age, unlike photoperiod plants whose flowering stage is triggered by the light/darkness ratio. This type of seed is made by crossbreeding Indica or Sativa plant with Ruderalis, a subspecies of cannabis found in regions that feature short summers but have many hours of daylight. This subtype of cannabis has evolved to flower quickly and adapted to flourish in very harsh conditions. Therefore, crossbreeding cannabis plants with Ruderallis genetics results in cannabis seeds that will produce high-quality flowers and great yields in a very short period of time. Normally, after you plant an autoflower seed, you’ll see the harvest in just about two months! However, after seeing our list of the fastest autoflower varieties you’ll realize that sometimes all you need is as little as 42 days!

Top 10 Quickest Autoflowering Seeds at Herbies?

Here we have made a list for those looking for the fastest autowflower strains that will thrive in the outdoor environments, as well as indoors. In our catalog, you can find the fastest autoflower seeds from the top breeders.

Big Bang Auto (Green House Seeds)

Big Bang Auto (GHS) Big Bang Auto (GHS)
  • Autoflowering
  • Cosmic harmony and pain control
  • 15 - 20 %
  • 900 g/m² indoors
    45 g/plant outdoors
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Big Bang Auto is an Indica-dominant cannabis strain and is a product of combining Skunk, Northern Lights, El Nino, and Ruderallis genetics. This hybrid can have anywhere between 15 - 20% THC content and delivers true relaxing Indica effects. It’s also often used to treat medical conditions, such as chronic pain, stress, anxiety, and appetite loss. Buds are infused with a sweet and fruity aroma and taste with the floral undertones. Big Bang Auto has a flowering period of just 42 days, which makes it probably the fastest autoflower in 2022! After this short flowering period growers can expect an average yield of 900 g/m2 (2.9 oz/ft2) if grown indoors, and around 50 g (1.7 oz) per plant in outdoor conditions.

Head Stash Auto (Big Head Seeds)

Head Stash Auto (Big Head Seeds) Head Stash Auto (Big Head Seeds)
  • Autoflowering
  • 15 %
  • A mind altering treasure
  • 450 g/m² indoors
    60 g/plant outdoors
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Head Stash Auto is a balanced hybrid and has a unique genetic profile that combines Jack Herer, Critical+ Auto, and Big Head #1 genetics. This strain comes with 15% THC content and offers balanced uplifting effects and a relaxing body high. Head Stash Auto has an amazing mixture of earthy and piney aromas alongside with citrusy taste. This strain reaches full maturity after just 7 weeks of flowering. If grown indoors, yield can reach up to 450 g/m2 (1.4 oz/ft2), while in an outdoor environment, a plant can yield up to 60 g (2.1 oz).

+ Speed Auto (Sweet Seeds)

+ Speed Auto (Sweet Seeds) + Speed Auto (Sweet Seeds)
  • Autoflowering
  • The real thing!
  • 15 - 20 %
  • 350 - 500 g/m² indoors
    30 - 150 g/plant outdoors
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+Speed Auto is a perfectly balanced hybrid that has been developed by crossing Speed Devil #2 Auto and Critical Mass genetics. This strain can contain up to 20% THC and offers a pleasant and uplifting Sativa-like high that will boost your creative side. Flowers of this strain are infused with sweet and fruity taste and aroma with a slight touch of cheese. This strain is among the fastest autoflower strains with a flowering period of just 49 days. Indoor harvest can range anywhere between 350 - 500 g/m2 (1.1 - 1.6 oz/ft2), while outdoors, growers can expect up to 150 g (5.2 oz) per plant.

Purple Punch Auto (Barney’s Farm)

Purple Punch Auto (Barney's Farm) Purple Punch Auto (Barney's Farm)
  • Autoflowering
  • 18 %
  • Devastating delight
  • 350 - 400 g/m² indoors
    400 g/plant outdoors
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Purple Punch Auto is a hybrid with 80% of Indica genes and comes as a result of crossbreeding Purple Punch with BF Auto Critical. This powerful autoflower comes with 18% THC content and produces uplifting and euphoric, and at the same time relaxing effects. Purple Punch Auto has a sweet taste and the scent of apple pie baked with cinnamon and cloves. Growers can expect their delicious flowers after just 60 days from germination. If grown indoors, this strain can yield up to 350 g/m2 (1.1 oz/ft2), while in outdoor conditions, a plant can bring up to 400 g (14.1 oz) of buds.

Sweet Skunk Auto (Sweet Seeds)

Sweet Skunk Auto (Sweet Seeds) Sweet Skunk Auto (Sweet Seeds)
  • Autoflowering
  • 16 - 20 %
  • Relief from the torment of the day
  • 400 - 500 g/m² indoors
    35 - 150 g/plant outdoors
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Sweet Skunk Auto is a balanced hybrid strain that has been made by crossbreeding Early Skunk with Critical Mass Auto genetics. With 20% THC-infused flowers, this strain delivers a balanced cerebral and uplifting high together with Indica-dominant relaxing effects. This strain has an intense Skunk aroma with undertones of citrus and a sweet and spicy flavor. Sweet Skunk Auto finishes flowering within just 7 weeks of flowering and provides growers with up to 500 g/m2 (1.6 oz/ft2) if grown indoors, and up to 150 g (5.2 oz) per plant if grown outdoors.

2 Fast & 2 Vast Auto (Heavyweight Seeds)

2 Fast & 2 Vast Auto (Heavyweight Seeds) 2 Fast & 2 Vast Auto (Heavyweight Seeds)
  • Autoflowering
  • 18 - 20 %
  • For giggling and for thinking
  • 600 - 800 g/m² indoors
    75 - 200 g/plant outdoors
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2 Fast & 2 Vast is an Indica-dominant and is a cross between Fast & Vast Auto and Northern Lights Auto. This hybrid can contain up to 20% THC levels and offers a strong and relaxing high that will leave you calm and more talkative, perfect for social events. Flowers come with an amazing fruity and sweet taste and aroma. 2 Fast & 2 Vast Auto is ready for harvest after only 56 of flowering and brings great results. Indoor growers can expect anywhere between 600 - 800 g/m2 (1.9 - 2.6 oz/ft2), while outdoors, yield can reach up to 200 g (7 oz) per plant.

Doctor Jamaica Auto (Vision Seeds)

Doctor Jamaica Auto (Vision Seeds) Doctor Jamaica Auto (Vision Seeds)
  • Autoflowering
  • 19 %
  • A relaxed state of mind
  • 250 - 450 g/m² indoors
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Doctor Jamaica Auto is a cannabis strain with 70% of Indica genetics and is a result of crossing the Doctor Jamaica strain with the Ruderalis phenotype. This Indica-dominant hybrid contains up to 19% of THC content and comes with potent and euphoric effects that will leave you fully relaxed and tuck you in bed. Plants are ready for harvest in just 56 days after germination, leaving growers with a yield of up to 450 g/m2 (1.4 oz/ft2).

Strawberry Pie Auto (Fast Buds)

Strawberry Pie Auto (FastBuds) Strawberry Pie Auto (FastBuds)
  • Autoflowering
  • Inner happiness
  • 26 %
  • 400 - 500 g/m² indoors
    70 - 160 g/plant outdoors
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Strawberry Pie Auto is an Indica-dominant hybrid developed by crossing original Strawberry Pie with autoflowering genetics. It’s a highly potent strain that can contain up to 26% THC content and produces strong effects of deep relaxation and mental calmness. Strawberry Pie Auto has a delicious taste of strawberries and cookies that come with a light touch of fuel and a sweet and fruity scent. This autoflower has a flowering period of just 9 weeks, producing an impressive harvest. Indoors, yield can reach up to 550 g/m2 (1.6 oz/ft2), while outdoors, it can get up to 160 g (5.6 oz) per plant.

Forbidden Runtz Auto (Fast Buds)

Forbidden Runtz Auto (FastBuds) Forbidden Runtz Auto (FastBuds)
  • Autoflowering
  • A bliss you will remember for long
  • 26 %
  • 450 - 550 g/m² indoors
    50 - 150 g/plant outdoors
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Forbidden Runtz Auto is a balanced cannabis strain whose origins remain unknown. This hybrid comes with highly potent buds that can contain up to 26% THC content and deliver hard-hitting and long-lasting effects that will completely calm your mind and body. Sweet flowers are infused with fruity flavor and aroma together with undertones of fresh soil. Forbidden Runtz Auto has a flowering period of 63 days, and if grown properly, can leave growers with great results. Indoor harvest averages 550 g/m2 (1.8 oz/ft2), while outdoors it can reach 150 g (5.2 oz) per plant.

Gelato Auto (Herbies Seeds)

Gelato Auto (Herbies Seeds) Gelato Auto (Herbies Seeds)
  • Autoflowering
  • 26 %
  • Outpouring of creativity
  • 400 - 600 g/m² indoors
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Gelato Auto is a Sativa-dominant hybrid and is a product of crossing Gelato and GSC genetics with unknown Ruderalis. This is one of the most potent autoflowering strains available on the market and comes with 26% THC content. Gelato Auto produces powerful uplifting and energetic Sativa-like effects that will boost your mood and creativity. Flowers have an amazing mix of flavors and aromas that range from cookies and ice cream to citrus and soil. Growers can expect fully mature plants after only 65 days of flowering time, after which harvest can reach up to 600 g/m2 (1.9 oz/ft2) indoors, and up to 200 g (7 oz) per plant outdoors.

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Why and Where to Get Autoflowering Seeds?

Autoflowering seeds are a great option for beginners, because of their high resistance to various environments and simple growing demands. Another great thing about autoflowers is their fast life cycle which usually lasts between 7 - 10 weeks. They grow at a compact size of between 60 - 100 cm which makes autoflower suitable for growing in small spaces.

If you are in search of the quickest autoflower seeds, check our catalog at Herbies. Visiting our shop you can find the fastest growing autoflower strains with 100% guaranteed germination. Our expert customer support is there for you 24/7 and will help you out with all of your questions. And best for last, on every placed order, we have prepared free seeds and other awesome gifts for our customers.

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Ollie Jordan
Just popped 2 of theese sweet seeds speed autos. Usually when I buy seeds I go with heavy indicas but lately I've been digging hybrid strains
so much solid info! I've never grown an auto flower but might next round. Going to be a cool grow with a quick run👍😎✌
Randy Melnychuk
Got a good tip increases the grow rates. Put on classical music in the tent, play it nice and low all day long. Plants love music.
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