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Autoflowering Cannabis: Unveiling Its History, Science, Benefits, and Cultivation

Autoflowering Cannabis

Unraveling the Mystery of Autoflowering Cannabis

Autoflowering Cannabis, also known as Day-neutral Cannabis, is a unique variety of cannabis that transitions from the vegetative growth stage to the flowering stage based on its age, irrespective of the light cycles like the photo-dependent or fast-flowering varieties are doing. This distinctive characteristic has made it a favored choice amongst both beginners and seasoned cannabis growers.

Tracing the Roots: The History of Autoflowering Cannabis

The intriguing history of Day-Neutral Cannabis can be traced back to the 1940s. It was first identified in the harsh wilderness of Russia, where it evolved its autoflowering trait as a survival strategy to withstand the severe climates. The autoflowering trait in cannabis is predominantly attributed to the presence of Cannabis ruderalis genes. This species of cannabis is renowned for its capability to flower based on age, rather than light cycles.

The Advantages of Autoflowers: Why Growers Love Them

Hassle-Free Cultivation

One of the primary advantages of auto-flowering cannabis plants is the ease of cultivation they offer. These plants have a unique characteristic of transitioning from the vegetative stage to the flowering stage based on age rather than light cycles. Unlike photoperiod plants that require careful monitoring and adjustment of lighting schedules, auto-flowering plants eliminate the need for such meticulous attention. This makes them ideal for novice growers or those with limited experience. Additionally, auto-flowering plants are generally more forgiving and resilient, tolerating minor mistakes or fluctuations in environmental conditions. Their ability to withstand stress and adaptability reduces the chances of crop failure, providing a more hassle-free cultivation experience.

Swift Harvest Time

Another significant benefit of auto-flowering cannabis plants is their remarkably short life cycle and swift harvest time. These plants typically complete their growth cycle in just 8 to 12 weeks from seed to harvest. This rapid development is due to their genetic makeup, which allows them to automatically enter the flowering stage after a certain number of weeks. The absence of reliance on specific light schedules enables growers to harvest multiple times within a single growing season. Swift harvest time is advantageous for both personal and commercial growers. It allows for quicker turnover and faster access to the final product, whether it is for personal consumption or commercial sale. The shorter harvest time also reduces the overall time and resources invested in cultivation, making it an efficient choice for growers.

Space-Saving Size

Auto-flowering cannabis plants are known for their compact size, making them an excellent option for growers with limited space. These plants tend to be smaller in stature compared to photoperiod plants, often reaching a height of 1 to 3 feet. The compact size is attributed to their Ruderalis genetics, which evolved in regions with shorter growing seasons. The smaller footprint of auto-flowering plants makes them suitable for indoor cultivation, balconies, and stealth growing operations. Their ability to thrive in small spaces allows growers to maximize their available area and cultivate discreetly. This is particularly advantageous for those who desire privacy or have limited outdoor space.

Cultivating Autoflowering Cannabis: A Step-by-Step Guide

Indoor vs. Outdoor Growing

Autoflowers can be cultivated both indoors and outdoors. However, due to their compact size and shorter life cycle, they are often favored for indoor cultivation. However, they are the perfect fit for outdoor cultivation, as you can run multiple cycles because you are not dependent on the length of the day and night.

Nutrient Requirements

Like all plants, autoflowers necessitate certain nutrients to flourish. However, due to their shorter life cycle, they may require a different feeding schedule compared to regular cannabis varieties.

During the vegetative stage, auto-flowering plants require a balanced nutrient mix with a higher ratio of nitrogen (N) to promote vigorous vegetative growth. As they transition into the flowering stage, the nutrient requirements shift towards higher levels of phosphorus (P) and potassium (K) to support the development of flowers and resin production.

It is important to monitor the pH levels of the nutrient solution as auto-flowering plants are sensitive to fluctuations. Maintaining a slightly acidic pH level between 5.5 and 6.5 ensures proper nutrient uptake and avoids nutrient deficiencies or toxicities.

Using quality fertilizers specifically formulated for cannabis cultivation, either organic or synthetic, can help provide the necessary nutrients in the correct ratios. Additionally, supplementing with beneficial microbes or mycorrhizae can enhance nutrient absorption and overall plant health.

Regular monitoring of plant health, leaf color, and growth patterns is essential to identify any nutrient deficiencies or imbalances. Adjusting the nutrient regimen accordingly and providing a well-balanced diet will contribute to healthy and productive auto-flowering cannabis plants.

Light Necessities

Despite their ability to flower irrespective of light cycles, autoflower plants still need sufficient light to produce high-quality buds.

Auto-flowering cannabis plants thrive with 18-20 hours of light per day during the vegetative stage. This extended light period promotes robust vegetative growth and allows the plants to reach their full potential. It is important to maintain a consistent light cycle to avoid stress or disruptions that could affect their growth and development.

When the plants enter the flowering stage, a light cycle of 12-14 hours of light per day is typically sufficient. This change in light duration triggers the plants to initiate flowering and produce buds. It is crucial to provide uninterrupted darkness during the dark period to ensure proper flowering and prevent any light leaks that can disrupt the flowering process.

In terms of light intensity, auto-flowering cannabis plants prefer moderate levels, usually around 400-600 watts per square meter. Providing the appropriate light intensity ensures optimal photosynthesis and growth while avoiding excessive heat or light stress.

Using high-quality grow lights specifically designed for cannabis cultivation, such as LED or HPS (high-pressure sodium) lights, can provide the necessary spectrum and intensity for auto-flowering plants. It is essential to position the lights at an appropriate distance from the plants to avoid light burn or stretching.

Proper light management, including the right light cycle, intensity, and distance, is crucial for the successful cultivation of auto-flowering cannabis plants. By meeting their specific light necessities, growers can promote healthy growth, flowering, and ultimately, achieve desirable yields.

Overcoming the Challenges with Autoflower Cannabis

Lower THC Content

One potential downside of autoflower Cannabis is that it typically has a lower THC or CBD content compared to regular cannabis strains. However, breeders are continually striving to develop autoflowering strains with higher THC levels. F1 SeedTech already developed stable F1 hybrid autoflowering Cannabis seeds that reach 25% of THC.

Smaller Yields

Due to their compact size, autoflower Cannabis plants generally yield smaller harvests compared to regular cannabis strains. However, their quick turnaround time can allow for multiple harvests in a single growing season. Also, the continuous efforts of our breeders ensure that our F1 autoflowers show comparable yields to photo-dependent varieties.

Conclusion: The Unique Appeal of Autoflowering Cannabis

Autoflowering cannabis offers a unique set of advantages that make it a popular choice among growers. Its ease of cultivation, quick harvest time, and compact size make it an ideal choice for both novice and experienced growers. However, like all plants, it comes with its own set of challenges. Understanding these can help growers make the most of this unique type of cannabis.


  1. What is autoflower cannabis? Autoflowering cannabis is a type of cannabis that automatically switches from the vegetative growth stage to the flowering stage with age, rather than changing light cycles.
  2. What are the benefits of autoflower Cannabis? Autoflowering cannabis offers several benefits including easy cultivation, quick harvest time, and compact size, making it ideal for both novice and experienced growers.
  3. What are the challenges with autoflower Cannabis? Autoflowering cannabis may present certain challenges such as lower THC content and smaller yields compared to regular cannabis strains. However, with proper understanding and care, these challenges can be effectively managed.
  4. Can autoflowers be grown indoors? Absolutely, autoflowering cannabis can be grown both indoors and outdoors. However, due to their compact size and shorter life cycle, they are often preferred for indoor cultivation. But it is in fact a perfect match for outdoor growth.
  5. Does autoflower cannabis require a specific light cycle? Despite their ability to flower regardless of light cycles, autoflowering cannabis plants still require sufficient light to produce high-quality buds.