fotoperiodo cannabis

Understanding Cannabis Photoperiod: Sativa and Indica

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The concept of photoperiod is essential for the development and flowering of the cannabis plant. This is the period of light that the plant receives during 24 hours and is a crucial factor that regulates the growth phases of cannabis, directly influencing the production of healthy and powerful flowers.

Knowing the Subspecies: Sativa and Indica

Cannabis Sativa and Cannabis Indica are the two best-known subspecies of the plant. Both have particular requirements regarding photoperiod, which need to be met so that they can grow optimally.

Photoperiod for Cannabis Sativa:

Sativa has a longer life cycle compared to Indica. It needs around 18 hours of light per day in the vegetative phase, which stimulates its growth and leaf development. When it is time to induce flowering, the photoperiod should change to 12 hours of light and 12 hours of darkness. This change signals to the plant that the season for flowering has arrived.

Photoperiod for Cannabis Indica:

On the other hand, Indica, with a shorter life cycle, flowers faster under a similar 12/12 (light/dark) photoperiod. However, the vegetative phase of Indica can be maintained under a slightly shorter light cycle than that of Sativa, in some cases ranging from 16 to 18 hours of light per day.

Indoor Cultivation: Photoperiod Control

In indoor cultivation, photoperiod control is done through timers that turn the lights on and off automatically. This allows the grower to simulate ideal light conditions for the vegetative and flowering phases.

Importance of Regularity and Consistency

A key aspect for successful cannabis cultivation is the regularity and consistency of the photoperiod. Any variation, especially in the flowering phase, can stress the plant and result in hermaphroditism or a reduced harvest. It is essential that plants have a complete and uninterrupted dark cycle during the flowering phase.


Photoperiod is a key element in unlocking the full potential of your cannabis plant. Understanding the specific light needs of Sativa and Indica subspecies is critical to achieving an abundant, quality harvest. Whether indoor or outdoor cultivation, correctly managing light cycles will ensure the proper development of your cannabis plants.

Remember to always check the current legislation in your place of residence regarding cannabis cultivation before starting your cultivation project.

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