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Autoflower Seeds

Want to grow weed fast? Autoflowers contain the Cannabis Ruderalis genetics which cause them flower based on age rather than light cycle. Our selection of autoflowering seeds can grow from seed to harvest in as little as 8 weeks and reach average heights of 100cm, making them perfect for indoor grows.

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What are autoflower seeds?

Autoflowering seeds are a type of cannabis seed that automatically switch from the vegetative stage to the flowering stage with age, rather than by light schedule adjustments. Autoflowers genetics can be traced back to Cannabis ruderalis, a species of plant that originally grew in Siberia, Russia and Eastern Europe. The Ruderalis species is known for its hardiness and ability to flower automatically.

Noticing the potential from a strain that flowers based on age, cannabis breeders in the late 90’s combined these traits with the more potent cannabis sativa and indica strains. The result is autoflowering cannabis strains that are easy to grow, have a shorter life cycle, and require less maintenance, making them ideal for both beginners and experienced growers looking for a quick, hassle-free cultivation process.

Advantages of growing autoflower seeds:

Indoor Growing: Autoflower seeds are great for small indoor grows, their compact size, makes them perfect if you are a bit tight on space.

Fast Flowering: Autos grow incredibly fast, often flowering within 2-4 weeks from germination and growing seed to harvest in 10 weeks. This quick turnaround allows for multiple harvests in a single season.

Hardy Ruderalis Genetics: Originating from the robust Cannabis ruderalis, autoflowers inherit resilience to harsh climates and common plant diseases, reducing the need for pest and disease and temperature control.

Same Light Cycle: Autoflowers don't require changes in the light cycle to flower. They can be grown under the same light schedule throughout their life, simplifying the growing process.

How much do autoflower strains yield?

Autoflower strains typically yield between 30-100 grams per plant. However, with high-yield genetics and optimal growing conditions, some plants can produce as much as 200 grams.

How potent are autoflowers?

Autoflowers have significantly increased in potency over the years. Traditionally, they had THC levels around 10-15%, but recent advancements in selective breeding have led to autoflowering strains that can reach up to 26% THC.

How long do autoflowers take to grow from seed?

Autoflowers typically take about 8 to 10 weeks to grow from seed to harvest. This short veg and flowering stages is one of their main advantages, shaving months off your schedule and allowing for quick turnover and multiple growing cycles within a single season.

What is the best light cycle for autoflower strains?

Most growers choose a lighting schedule of either 18 hours of light and 6 hours of darkness (18/6) or 20 hours of light and 4 hours of darkness (20/4). These cycles offer a balance of optimum light absorption and enough nightly recovery time. However, autoflowers are adaptable and can grow under almost any light cycle. Some growers even opt for 24 hours of continuous light to maximize growth, although this can stress plants.

Are all autoflower seeds feminized?

All of our autoflowers at 420 Seeds are feminized, ensuring they grow into bud-producing female plants. While it is possible to find regular autoflower seeds, they are less common and not as popular due to the higher likelihood of male plants that don't produce buds.

What is the best way to store autoflower seeds at home?

Autoflower seeds should be stored in an airtight container, placed in a cool, dark, and dry area away from temperature fluctuations. This environment keeps them fresh for longer ensuring their viability. If you plan to store them for longer than six months, it's best to keep them in a refrigerator at 6°C - 8°C.

Best Sellers
  1. Amnesia Haze by Royal Queen Seeds
    Amnesia Haze Feminized by Royal Queen Seeds
    From: US$31.81
    • THC: Over 22%
    • Yield: Over 600gr/m²
    • Flowering Time: 12-14 Weeks
    More Info
  2. Jack Herer Feminized by Sensi Seeds
    Jack Herer Feminized by Sensi Seeds
    From: US$70.75
    • THC: 15%-18%
    • Yield: 500-600gr/m²
    • Flowering Time: 12-14 Weeks
    More Info
  3. Gorilla Glue Autoflower seeds
    GG4 Autoflower by MSNL Seeds
    From: US$69.10
    • THC: 20%-24%
    • Yield: 500-600gr/m²
    • Flowering Time:
    More Info
    NEW IN
  4. Godfather OG Autoflower Seeds
    Godfather OG Autoflower by MSNL Seeds
    From: US$69.10
    • THC: Over 25%
    • Yield: 400-500gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
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  5. Gelato Autoflower seeds
    Gelato Auto Feminized by MSNL Seeds
    From: US$69.10
    • THC: 20%-24%
    • Yield: 400-500gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
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  6. Northern Lights Autoflower seeds
    Northern Lights Autoflower by MSNL Seeds
    From: US$69.10
    • THC: 10%-15%
    • Yield: 200-300gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
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  7. Bruce Banner Autoflower seeds
    Bruce Banner Autoflower by MSNL Seeds
    From: US$64.81
    • THC: Over 25%
    • Yield: 500-600gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
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  8. White Widow Autoflower seeds
    Auto White Widow Feminized by MSNL Seeds
    From: US$69.10
    • THC: 16%-19%
    • Yield: 200-300gr/m²
    • Flowering Time:
    More Info
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  9. Wedding Cake Autoflower seeds
    Wedding Cake Autoflower by MSNL Seeds
    From: US$60.52
    • THC: 16%-19%
    • Yield: 500-600gr/m²
    • Flowering Time: 6-8 Weeks
    More Info
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  10. Gorilla Cookies Autoflower seeds
    Gorilla Cookies Autoflower by MSNL Seeds
    From: US$64.81
    • THC: 20%-24%
    • Yield: 400-500gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
    NEW IN
  11. Nitro Lemon Haze Feminized seeds
    Nitro Lemon Haze Female by MSNL Seeds
    From: US$60.52 As low as US$27.23
    • THC: 20%-24%
    • Yield: 400-500gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
    NEW IN
  12. White Widow Max Feminized seeds
    White Widow Max Feminized by MSNL Seeds
    From: US$77.68
    • THC: 20%-24%
    • Yield: 500-600gr/m²
    • Flowering Time: 8-10 Weeks
    More Info
    NEW IN