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Vegetative vs. flowering growth.

The Dual Phases of Cannabis Growth: Understanding Vegetative vs. Flowering Stages

Cannabis, an annual wonder of nature, follows a rhythmic life cycle. Like a well-orchestrated symphony, it germinates, grows, flowers, and then gracefully concludes its life by shedding seeds. This journey is divided into two primary acts: the vegetative phase and the flowering phase.

Vegetative Growth: The Foundation

During the vegetative phase, the cannabis plant focuses on building its structure. It’s like the adolescence of the plant, where it rapidly grows branches and leaves, preparing itself for the grand act of flowering. This phase is all about growth and expansion.

Flowering Growth: The Grand Finale

The flowering phase is the climax of the cannabis plant’s life. It’s during this time that the plant produces its coveted buds, which are harvested for their medicinal and recreational properties. But what triggers this transition from vegetative to flowering?

The maestro behind this transition is a hormone called florigen. Think of florigen as the plant’s internal clock. It accumulates in the cannabis plant when the plant experiences shorter periods of light. Once the florigen reaches a certain threshold, it signals the plant to transition into the flowering phase.

Nature’s Clock vs. The Indoor Grower’s Control

In the great outdoors, the sun determines the cannabis plant’s growth phases. The long sunlit days of spring and early summer keep the plant in its vegetative state. As autumn approaches and the days shorten, florigen accumulates, prompting the plant to enter its flowering phase.

However, indoor growers have a unique advantage: control. By manipulating artificial light exposure, they can dictate the plant’s growth phase. A common practice is to expose plants to 16-24 hours of artificial light, ensuring they remain in the vegetative state. But the real magic happens when growers decide to transition their plants to the flowering phase. By reducing the light exposure to 12 hours or less, they can induce flowering, even if the plant has had only a brief vegetative phase.

The Importance of Darkness

While light is crucial, darkness plays an equally vital role, especially during the flowering phase. To ensure successful flowering, cannabis plants require uninterrupted darkness. Any light leaks can disrupt this process, potentially reverting the plant back to its vegetative state. This is why many indoor growers use tents or specialized rooms that can be sealed to prevent any light intrusion.


In Conclusion: Whether you’re a novice grower or a seasoned expert, understanding the delicate balance between light and darkness, and the role of florigen, is crucial for a successful cannabis harvest. By mastering these elements, growers can optimize their yield and enjoy the fruits of their labor.