THC in cannabis: how to increase the percentage of THC content
May 26, 2025

THC in cannabis: how to increase the percentage of THC content

Making the buds as potent as possible is the desire of every grower. Today, the cannabinoid content of cannabis plants is becoming increasingly important in both the medical and recreational fields. Modern consumers are becoming more informed and demanding, they are looking for products with a specific cannabinoid ratio. Some prefer strains with high levels of THC for an intense psychoactive effect, while others choose varieties with high CBD and minimal THC.


Knowing the exact cannabinoid levels in seeds or flowers allows users to make an informed choice that suits their goals - whether it is relaxation, therapy, or maintaining overall health.


The Importance of THC and the Role of Cannabinoids


THC (tetrahydrocannabinol) remains one of the most popular cannabinoids among growers and consumers due to its psychoactive and therapeutic properties. For those looking to get the maximum level of THC in their buds, it is essential to choose genetics with an initially high content of this component. It should be remembered that the quality of the original plant material plays a decisive role, and a competent approach to cultivation can significantly increase the concentration of THC. Despite the many factors affecting the yield, the key question remains the same: how to increase the total THC content in the final product? In this article, we will look at the main methods for maximizing THC production when cultivating cannabis.



Cannabis Seeds: Choosing the Right Genetics


If you want to increase the THC level in your plants, the first and one of the most important steps is to choose the right seeds. Currently, the market offers a huge variety of strains with THC levels reaching almost 30%. Just a few years ago, such figures seemed unattainable, but thanks to modern breeding technologies and careful genetic work, producers are creating strains with outstanding characteristics. However, choosing a strain is just the beginning. In addition to high THC levels, experienced growers pay attention to many other factors, including pest resistance, flowering speed, nutrient requirements and other parameters that affect the overall yield. For home growers, the aroma, taste and appearance of the plants are also important, as these characteristics significantly increase the pleasure of growing.


Plant Health and Its Impact on THC Levels


Achieving maximum THC levels is impossible without creating optimal conditions for growing cannabis. Any stress caused by unbalanced nutrition, improper humidity or insufficient lighting can significantly reduce plant productivity. Even with modern equipment, success is not guaranteed if plants are deficient in nutrients or suffer from overwatering. The main task is to provide the most comfortable environment, free from factors that can slow growth or reduce cannabinoid production.


Plant health can be compared to preparing an athlete for a competition - to achieve the best results, it is important to carefully control every aspect of care. Temperature, humidity, lighting, root system condition, pH and EC levels, as well as the temperature of the watering solution - all this directly affects the growth and development of plants. When creating optimal conditions, hemp reveals its potential, demonstrating high yields and cannabinoid content.


Temperature and humidity: basic parameters


One of the key factors in successful cannabis cultivation is proper temperature and humidity management. The interaction of these parameters significantly affects plant growth. To maximize THC levels, it is important to avoid high temperatures above 30ºC, as this leads to terpene evaporation and a decrease in cannabinoid concentration. The optimal temperature is considered to be around 25ºC, which helps preserve aroma and flavor, and also stimulates THC production.


In the late stages of flowering, a decrease in air humidity can have a positive effect on resin formation and cannabinoid content. Some varieties are particularly sensitive to a decrease in humidity in both the air and the substrate. However, this decrease should be moderate so as not to harm the plants. A slight decrease in humidity allows you to increase productivity without risking the health of the crop.



Lighting and its role in increasing THC


Quality lighting is a key factor in growing cannabis and increasing THC levels. While HPS lights remain popular, more and more professional growers are choosing modern full-spectrum LED or CMH lights. These light sources provide a wider spectrum, which helps increase the production of cannabinoids and other beneficial substances. The optimal lighting power is approximately 600 watts per square meter, although LED systems can be slightly lower due to adjustable brightness, which provides additional control over the growing process.


Choosing the right lighting directly affects the level of THC in plants. The more light in the right spectrum the plant receives, the more active photosynthesis and THC synthesis processes are. A properly configured lighting system helps to achieve maximum yield and improve the quality of the final product.


Optimal harvest time


One of the most important stages in the cannabis growing process is determining the optimal time for harvesting. THC accumulates in the trichomes during flowering, reaching its maximum when the plant is fully mature. As the plant matures, the THC level in the trichomes increases, but after reaching the peak, it begins to break down under the influence of various factors. Therefore, producers carefully monitor the condition of the trichomes so as not to miss the best moment for harvesting. Usually, the peak of THC content occurs at a time when most trichomes become milky in color.


If harvesting is delayed, THC begins to decompose, which negatively affects the quality of the final product. That is why it is extremely important to monitor the condition of the plants in a timely manner and harvest at the time of maximum THC content.


Conclusion


Increasing the THC level in cannabis requires a comprehensive approach, including the right choice of genetics, careful environmental control, and precise timing of harvest. Maximum results are achieved only with careful consideration of all factors, from seed selection to optimizing lighting and microclimate. By following these guidelines, growers can significantly increase the THC content of their crops and ensure high-quality products for consumers.



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