From germination to harvest, the cannabis plant goes through several stages of development, each with its own unique requirements. Each of these phases directly influences the plant’s health, the eventual yield, and the quality of the flowers.
In this article, you’ll learn about the developmental stages cannabis goes through and what you need to keep in mind along the way.
Every cannabis plant begins its journey as a seed. Even though this phase lasts only a few days, it lays the foundation for the plant’s entire future development. During germination, the seed absorbs water. This activates biological processes that were previously dormant. Shortly thereafter, the first root breaks through the seed coat and makes its way into the growing medium. The first cotyledons then develop.
What are the ideal conditions?
For successful germination, cannabis primarily needs:
Don't overwater. Many growers want to do what's best for their plants and keep the seeds constantly wet. However, this leads to a lack of oxygen in the root zone, which makes germination more difficult or even prevents it altogether. You should also be mindful of extreme temperature fluctuations. Conditions that are too cold significantly slow down development.
As soon as the first root becomes visible, the seedling should be handled as little as possible. The young root is extremely sensitive and can be weakened even by minor damage.
After germination, the so-called vegetative phase begins. During this time, the plant focuses on building its structure. Leaves, stems, side shoots, and—above all—the root system now develop rapidly. The plant stores energy for later flowering. Many experienced growers consider this phase to be one of the most important of all. Mistakes made during the growth phase are often difficult to correct later on.
What happens during this phase?
The plant continuously produces new pairs of leaves and forms additional shoots. At the same time, the root system continues to grow deeper. The healthier this development is, the better the plant will be able to absorb water and nutrients later on.
Typical factors that influence growth include:
Nitrogen is especially important during this period. This nutrient supports the development of foliage and vigorous growth.
Do not over-fertilize plants during this period. Using a lot of fertilizer does not automatically mean more growth.
For many, the flowering phase is the most exciting time of the entire life cycle. Now the plant begins to invest its energy in the formation of flowers, cannabinoids, and terpenes.
How is flowering initiated?
For photoperiodic strains, flowering is triggered by a change in the light cycle. Indoors, the light cycle is often switched from 18 hours to 12 hours. Outdoors, nature takes care of this process automatically as the days grow shorter. Autoflowering strains are an exception; they automatically transition to flowering after a certain period of time, regardless of the light cycle.
What happens during flowering?
In the first few weeks, cannabis plants initially grow significantly in height. This so-called “stretch” often comes as a surprise, especially to beginners. Afterward, the plant increasingly focuses on developing its flower clusters.
This results in:
As flower density increases, so does the risk of mold and other problems.
The following are particularly critical:
Good quality isn't lost due to poor genetics, but rather due to inadequate climate control during flowering. Every strain has an optimal harvest window. If you wait too long, you risk changes in the cannabinoid profile.
Many growers invest months in raising their plants, only to lose some of that quality in the final weeks. Yet it is often the post-harvest processing that determines the final result.
Recognizing the Right Harvest Time
The color of the trichomes is considered one of the most important indicators.
As a general rule:
The ideal time depends on the desired properties of the final product.
Why Drying Is So Important
After harvesting, the flowers still contain a lot of moisture. This moisture must be reduced in a controlled manner.
Drying too quickly can:
On the other hand, drying too slowly increases the risk of mold. As a general guideline, temperatures should be around 18 to 21 degrees Celsius with controlled humidity.
Curing – The Final Step in Quality Control
After drying, the curing process begins. During this phase, natural processes take place within the flowers. This can significantly improve the flavor and aroma. It is precisely at this stage that many high-quality products distinguish themselves from average ones. Even perfectly grown plants can lose quality due to poor drying. Conversely, a mediocre harvest can often be significantly improved through professional post-processing.
The various phases of cannabis form a continuous developmental chain. Each phase builds on the previous one and directly influences the next. Anyone who wants to successfully cultivate cannabis should therefore not only focus on the flowers but also understand the entire life cycle of the cannabis plant.