Photoperiod

Photoperiod refers to the duration of light and darkness that a plant experiences within a 24-hour cycle. This concept is crucial in the growth and flowering of cannabis plants.

What is Photoperiod? - A Layman Version

Photoperiod is the balance of light and darkness that a plant gets in a day.

This balance signals to cannabis plants when to grow and when to start flowering. For example, plants typically need more light during the growing phase and less during the flowering phase, often adjusted to 12 hours of light and 12 hours of darkness to initiate flowering.

What is Photoperiod? - A Definitive Explanation

Photoperiod is the cycle of light and dark that determines the developmental stages of plants, like cannabis, over a 24-hour period.

In cannabis cultivation, controlling photoperiod is essential. During the vegetative stage, cannabis plants thrive with longer daylight hours, usually around 18 hours of light and 6 hours of darkness. This extended light period encourages robust growth and development. When growers want the plant to flower, they shift the photoperiod to equal parts light and dark—12 hours each—mimicking the natural transition from summer to fall.

Understanding photoperiod is critical for indoor growers who must replicate these natural light cycles to ensure a successful harvest. Outdoors, the changing seasons naturally alter the photoperiod, guiding the plant through its life stages.

• Vegetative Stage: 18/6 (Light/Dark)
• Flowering Stage: 12/12 (Light/Dark)

Common Questions about Photoperiod

How does photoperiod affect cannabis growth?

Photoperiod impacts cannabis by signaling when to grow and when to flower. Longer light periods encourage growth, while equal light and dark periods trigger flowering.

Can photoperiod be adjusted for indoor plants?

Yes, indoor growers can control photoperiod by setting timers to manage the light and dark cycles, simulating natural seasonal changes.

What happens if the photoperiod is incorrect?

Incorrect photoperiods can stress plants, leading to poor growth or flowering issues. Consistent light schedules are crucial for healthy plants.

Do autoflowering cannabis plants require a specific photoperiod?

Autoflowering strains are less dependent on photoperiod changes to flower. They flower based on age rather than light cycles, making them easier for beginners.