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The Best Light Cycle for Autoflowers – Do Autoflowers Need Darkness?

Best Light Cycle for Autoflowers

The light cycle may affect autoflower plant growth, ultimate yield, bud density, branch creation, and even plant height. However, gardeners should understand why plants perform best in particular light cycles and what cycles would be ideal at certain phases of plant growth! Autoflowers will bloom under any light cycle. This implies they may be cultivated under a 24/0 light cycle or even a 12/12 light schedule. Conversely, there are more elements to consider than whether or not the plants will grow!

Understanding autoflower cannabis

Autoflowering seeds are cannabis that begin flowering when the plant reaches a specific growth stage. This is in contrast to photoperiod flowering, which happens after the summer solstice. Photoperiod flowering plants require at least a couple of weeks of long nights before blooming. Red wavelengths of sunlight become increasingly plentiful in late summer and early autumn. This red light contains the plant’s energy to grow intricate blooms. Blue light wavelengths are more prevalent in the spring. During vegetative development, plants rely on this blue light to thrive.

Furthermore, producers cross-breed ruderalis with popular Indica or Sativa strains to produce autoflower cannabis seeds. The latter two are photoperiod variations, whereas ruderalis begins blooming independently of light cycles. Gardeners get the best of both worlds when combined with popular Indica or Sativa strains.

The best light cycle for autoflower cannabis

Autoflowering cannabis strains blossom as they age rather than when their light cycle changes. Nonetheless, supplying the proper light to your plants is critical to ensure the highest possible harvest.

24hr light cycle

This is one of the most curious things about autos – can you grow autoflowers with 24hr light?

Many producers believe that autoflowers should be exposed to light 24 hours a day. They say it’s the optimum light cycle since plants tend to grow when given a lot of light. Technically, the plants develop better under a 24/0 light cycle because cannabis can absorb carbon dioxide during the photosynthesis process, converting it to a C3 plant. Ruderalis has also been growing in the northern hemisphere for ages. It is not rare for plants in some places to experience 24 hours of continuous sunshine; thus, autoflowers can thrive. You must remember that no matter what form of plant you cultivate – autoflowers, photoperiod – they all want rest. All plants require rest times to recuperate from any injury. Autoflowers, too, need beauty sleep to operate efficiently.

12/12 light cycle

Some growers continue to use a 12/12 light cycle on their autos throughout blooming. That’s alright because autoflowers cultivated under these conditions may still provide a decent crop. Just keep in mind that buds harvested under a 12hr light cycle will be notably smaller than those harvested under 18-24hr of light. Some reasons why you should keep your autos under 12/12 include:

  • Heat concerns: If you reside in a hot area, you might consider turning off your grow lights throughout the day to avoid scorching your grow room. In that situation, growing your autos on a 12/12 light cycle—with lights on at night—might be your best choice to prevent inflicting heat stress on your cannabis plants.
  • Growing photoperiod strains alongside autos:  If you’re growing autoflowers with feminized photoperiod strains, you’ll probably have to keep your autos in the same room as your blooming feminized seeds. This means that they’ll only get 12 hours of light every day.
  • Saving money:  Running grow lights for 18-24 hours a day over several months may quickly add up. If you want to develop autos on a budget, you may consider using a 12hr light cycle instead.

18/6 light cycle

Cannabis is a C3 plant that can absorb CO2 for photosynthesis even during the day. C3 plants use the C3 pathway in photosynthesis to fix and degrade inorganic CO2 into organic molecules. And, because autoflowering plants have shorter vegetative periods and frequently develop shorter than photoperiod strains, you should feed your autos at least 18 hours of light. This enables rapid expansion while avoiding energy waste. Your autos enjoy light just as much as typical photoperiod strains, but they don’t need it to start blooming.

Do autoflower seeds require darkness?

Autoflowers do not require darkness because the Ruderalis is acclimated to 24 hours of brightness, depending on the season. They may be cultivated in any light cycle if under adequate temperature conditions. Even in the wild, the Ruderalis does not require light to bloom.

Do Autoflowers Need Darkness?
Do Autoflowers Need Darkness?

Only once the plant has reached a specific height and developed a few branches or nodes it begins to blossom. However, a 24/0 may be harsh for plants. It also offers no room for mistakes for the farmers. And because the plant does not have time to relax, it takes longer to recover.

Today’s autoflowers are durable and resistant to many illnesses, with the capacity to adapt anywhere, but they cannot be compared to plants living in the wild. Furthermore, it has been claimed that plants require at least a few hours of darkness for key metabolic activities, making an 18/6 cycle an ideal choice.

How to determine if your cannabis plant is autoflower

There are various methods for determining autoflower cannabis plants. The container is labeled when you buy cannabis seeds from a trustworthy seed bank. You’ll know exactly what kind of seeds you purchased. Autoflower cannabis seeds are bushier in structure and grow shorter than photoperiod strains. Many of these plants are just 2 feet tall. They develop swiftly as well. Within three months, the buds are ready for harvest. The most obvious way to know if you’re cultivating autoflowers is to observe them during the vegetative stage. If your plants start flowering independently, you’ll know they’re not photoperiod. The ultimate output is also higher with photoperiod variations, exceptionally when trained during the vegetative stage.

Cultivating autoflower cannabis outdoor

With so many disagreements and debates over the light cycle for indoor autoflowers, one would ask about the light cycle for plants growing outside. Some gardeners want the utmost for their plants and want to experiment. For example, they let the plants soak up the sunshine in the morning and bring them inside after the sun goes down. Doing so guarantees that the plants receive adequate light while conserving money. While this method may work for some people, it is not required. Even if you only receive 12 hours of sunshine daily, autoflowers will thrive outside.

The vegetative and blooming periods may prolong, although this does not affect production or growth. That is because sunlight is natural, and even the greatest grow lights available today cannot compete with it. Artificial lights are incredible and allow you to grow plants without sunlight, but nothing beats sunlight. Moving the plants indoors is unnecessary to acquire more light, especially if they have received enough sunlight throughout the day. Furthermore, plants may become confused if they are repeatedly exposed to diverse light sources. Thus, if you’re growing outside, let the plants cool and breathe in the fresh air, and the harvests will astound you even with only a few hours of natural light.

Conducting SOG with autoflower cannabis

Sea of Green, also known as SOG, is a training method that can provide some impressive results. SOG entails growing multiple smaller plants near generating a uniform canopy that maximizes light exposure and space rather than developing your plants as much as feasible. SOG is an excellent strategy to explore with autos because it uses their tiny height. While each grower has its unique SOG strategy, most typically grow 4-16 plants per m2, depending on how big they allow each plant to develop. Experts recommend using 7-10l pots and cultivating 4-6 plants per m2, depending on the size of the strain you’re producing. This should maximize your area and illumination while allowing adequate plant ventilation to minimize mold issues. Also, use smaller pots if you prefer to grow more plants per m2 to regulate their size and prevent overwhelming your growing area.

The importance of providing the correct light spectrum at the ideal time

When growing any cannabis plant, including autos, it is critical to use the proper light spectrum. Because autoflower plants have such brief life cycles, you want to provide them with the best light, nutrients, and soil possible. When light passes through a prism, it is divided into multiple color spectrums. Plants, which rely on sunlight for photosynthesis, react differently to the various spectrums. Researchers propose keeping to the following light spectrums, just like with a photoperiod cannabis strain:

  • 6500K blue light during vegetative phase: Blue light spectrums have been demonstrated to promote vegetative development in cannabis plants, allowing them to grow short and stocky while minimizing stretching.
  • 2700K red light during flowering: Red light spectrums are great for blooming since they promote budding and a little stretch, allowing your plants to develop large, dense blooms.

Additional tips for growing autoflower cannabis

Follow these basic recommendations for a greater harvest if you’re new to the world of autoflowers:

  1. Choose a high-yielding autoflower: Not all autoflowers are created equal, so if harvest size is essential to you, choose a high-yielding variety. Examples of high yielding autoflowers include Gorilla Glue 4 auto, Bruce Banner autoflower and Critical Mass auto.
  2. Plant in the final container: Uprooting cannabis plants is always stressful. Because autoflowers may mature from seed to harvest in as little as eight weeks, it’s better to prevent this stress by planting your seeds directly into their final pots.
  3. Use an airy growing medium: This encourages root and leaf development.

Utilize LST: Only use low-stress approaches to train your autoflowering cannabis plants. High-stress tactics like fimming, topping, and supercropping will ultimately cause more harm than good.

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Marcus Smith

Marcus is a relative newcomer to the cannabis world. Though it may seem that his youth wouldn’t allow for a wealth of knowledge, this is untrue. Marcus Smith has close relationships with many cannabis breeders and grow owners which have allowed him to sample the best cannabis across the US and beyond while also gaining valuable insight into how different strains grow and develop. About this Author

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