Best Light Schedule for Autoflowers ─ How Many Hours of Light Do They Really Need?

Are you planning to grow autoflowers but don’t know how much light they need? Or perhaps you’re struggling with maintaining the right light schedule for them?

Worry no more, as we unveil the ilovegrowingmarijuana.com! As a cannabis enthusiast or cultivator, it’s essential to understand that different strains require varying amounts of lighting.

But when it comes to autoflowers, their unique genetic makeup means they have a distinct approach to lighting compared to other plants.

In this article, we’ll dive deep into what makes them so special and provide valuable insights on how many hours of light they really need. So sit back and let’s explore the world of autoflowering cannabis together!

What are Autoflowers?


Source: growersnetwork.org

Autoflowers are a type of cannabis plant that has gained immense popularity in recent years. Unlike traditional cannabis plants, autoflowers automatically switch from the vegetative phase to the flowering phase after a set period. This means they do not rely on changes in light cycles to begin flowering.

Another characteristic of autoflowers is their smaller size compared to regular cannabis plants. They typically grow up to 3 feet tall and have a shorter lifespan, allowing for multiple harvests in one growing season.

One reason why growers love autoflowers is their ability to thrive in different environments, including indoor and outdoor settings. Their small size makes them ideal for those with limited space or who want to keep a low profile.

Moreover, autoflowering seeds come in various strains, offering an array of flavors and effects suitable for both recreational and medicinal purposes.

Autoflowers offer several advantages over traditional cannabis plants that make them an attractive choice for growers looking for high-quality yields without much hassle.

How Much Light Do They Need?

Source: vegetalbioplant.com

Autoflowers are a type of cannabis plant that is known for its quick and easy growth process. One of the key factors in their growth is the amount of light they receive. But just how much light do they need?

The answer to this question depends on the stage of growth your autoflower is in. During the seedling stage, autoflowers require around 18 hours of light per day. This helps them establish strong roots and develop healthy leaves.

Once your plants reach the vegetative stage, you can reduce their daily light exposure to 16-18 hours per day. This will encourage them to grow taller and stronger before transitioning into flowering.

During flowering, it’s important to maintain a consistent 12-hour cycle of darkness followed by 12 hours of light each day. This mimics nature’s natural photoperiod during fall when days get shorter.

It’s worth noting that every strain may have slightly different requirements for optimal growth based on its genetics and environment. Keep an eye on your plants’ health and adjust lighting schedules as needed to ensure maximum yields at harvest time!

The Best Light Schedule for Autoflowers

Source: dutchseedsshop.com

When it comes to growing autoflowers, lighting is a crucial factor that can affect their growth and quality. Unlike photoperiod plants, autos don’t need specific light schedules for vegetative and flowering stages. Instead, they rely on the number of hours of light per day to determine when to start blooming.

The best light schedule for autoflowers is 18-20 hours of daily light during the vegetative stage and 12-14 hours during flowering. This means that you’ll need to switch from an 18/6 or 24/0 cycle (for maximum growth) to a 12/12 cycle once your plants start showing signs of flower formation.

Keep in mind that too much or too little light can stress out your autoflowers and negatively impact their yield and potency. That’s why it’s important to find the right balance based on your strains’ genetics, environmental conditions, nutrients, and other factors.

Another tip is to gradually adjust the light schedule over several days instead of abrupt changes that could shock your plants. For instance, you can decrease the daily lighting by one hour every few days until you reach the desired level.

Finding the best light schedule for autoflowers requires some experimentation but following these general guidelines will help ensure healthy and productive harvests.

How to Change the Light Schedule for Autoflowers

Source: 2fast4buds.com

Changing the light schedule for autoflowers can be tricky, but it’s important to do so in order to maximize your plant’s growth potential. First, determine what kind of lighting source you’re using and how much wattage is needed for each stage of growth. Typically, growers will use LED or HID lights.

When changing the light schedule for autoflowers, start by gradually reducing the number of hours they receive per day. This should happen over a period of two weeks in increments of one hour per day until reaching 12-14 hours per day during their flowering stage.

It’s important to avoid sudden changes in light schedules as this can cause stress on the plants and negatively impact their yield potential. Additionally, make sure that there is enough darkness time when adjusting your light schedule since this triggers flowering hormone production.

If you are growing indoors with artificial lights, keep in mind that heat produced from these fixtures can also affect your plants’ growth rate and overall health condition. For instance, if temperatures go above 80 degrees Fahrenheit at any given point during cultivation (and especially during their dark cycle), bud development may slow down significantly.

Understanding how to change the light schedule for autoflowering cannabis plants takes patience and attention to detail. However it pays off when done correctly as it contributes greatly towards an optimal harvest outcome!


To sum it up, the best light schedule for autoflowers can significantly impact their growth and yield. Understanding how much light your plants need is crucial in ensuring they reach their full potential. Remember to provide them with around 18-20 hours of light during the vegetative phase and decrease it to 12 hours when the flowering stage begins.

Keep in mind that there is no one-size-fits-all approach, as different strains may have varying needs. Always monitor your plants closely and observe any signs of stress or overexposure to light.

By following these guidelines and making necessary adjustments along the way, you can maximize your autoflower’s potential and produce a bountiful harvest. Happy growing!

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