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Cannabis Roots System: All You Need to Know

germinated cannabis with a root

Maintaining a healthy root system is critical for the overall health and growth of marijuana plants. The cannabis roots system begins to grow from a tiny white tip that sprouts from a cannabis seed during germination. This root system is made up of a main taproot and several smaller roots that spread out in all directions, creating a network. This root system is also surrounded by an ecosystem of microbes, such as bacteria and fungi, which have a symbiotic relationship with the roots.

How Roots Support Marijuana Plants?

The cannabis root system is responsible for several important functions, including providing support for the plant, absorbing water and nutrients, storing starches for growth, and preventing soil erosion. A well-developed root system is crucial for the plant to stand upright and anchor firmly to the soil, especially during the flowering period.

The Function of the Cannabis Roots System

Roots are also responsible for taking in water and nutrients from the soil, which are necessary for the plant’s overall health and growth. If the root system is not properly developed, it can impact the plant’s ability to absorb these essential resources and lead to stunted growth. Roots also store starches that the plant requires for growth, similar to the way branches and leaves do. In addition, roots help prevent soil erosion by providing an area for beneficial bacteria to thrive.

How to Keep Cannabis Roots System Healthy?

There are several factors that can impact the health of the cannabis root system.


One of the most important is ensuring that the roots have access to oxygen. Plants need oxygen to absorb through their roots in order to produce ATP, a molecule that transfers chemical energy throughout the plant. Without a sufficient amount of oxygen, the plant cannot provide energy to all of its parts, which can lead to slowed growth and even death.

To ensure that your plants are getting enough oxygen, it is important to water them appropriately. However, it is also important to avoid overwatering, which can drown the roots and create a breeding ground for pathogens. It can be helpful to allow the soil to dry out between watering in order to reduce the risk of overwatering.


Temperature is another important factor to consider when it comes to the health of the cannabis root system. The ideal temperature for cannabis roots system is around 24 degrees Celsius. If you are growing your plants in soil, there are several ways that you can help maintain this temperature.

  • Use thermometers to regularly check the temperature of the soil.
  • Place a fan specifically designed for plants under your canopy.
  • Install an exhaust above the canopy to increase air circulation in the room where your plants are located.

For those who are growing marijuana in a hydroponic system, it is important to maintain a temperature of around 19 to 25 degrees Celsius. Water has the highest oxygen level at this temperature, which can lead to rapid growth and healthy plants.

Here are some techniques for maintaining the temperature of the water.

  • Add cool water or ice regularly to the reservoir.
  • Paint the reservoir container white to reflect heat and light
  • Use an aquarium heater to regulate the temperature

If you are growing your plants outdoors, you can plant mulch or crops such as clover around the base of the plants or cover the soil with hay to insulate the roots. This can be especially useful in areas with significant temperature fluctuations.


In addition to oxygen and temperature, it is also important to provide the roots with the appropriate nutrients. Cannabis plants require a variety of nutrients, including nitrogen, phosphorus, and potassium, as well as micronutrients like zinc, copper, and iron.

These nutrients can be provided through the use of fertilizers, either chemical or organic. It is important to choose a fertilizer that is specifically formulated for marijuana plants in order to ensure that they are getting the right balance of nutrients.


It is also important to avoid planting the roots too deeply, as this can lead to problems with the root system. If you plant roots too deeply, they may not receive enough oxygen and struggle to absorb the necessary nutrients from the soil. This can lead to slowed growth and reduced yields. It is generally recommended to plant cannabis seeds about half an inch deep or deep enough to cover them completely.

pH Levels

Another factor to consider when it comes to the health of the cannabis root system is the pH of the soil. The pH level of the soil refers to its acidity or alkalinity, and different plants have different pH requirements.

Cannabis plants prefer slightly acidic soil with a pH level of around 6.0 to 6.5. If the pH level of the soil is too high or too low, it can impact the plant’s ability to absorb nutrients and can lead to problems with the root system. There are several ways to test the pH level of your soil, including using pH test strips or a pH meter. If the pH level is not within the optimal range for cannabis plants, there are several ways to adjust it, including adding lime to increase the pH or sulfur to decrease it.

Bottom Line

The cannabis root system plays a crucial role in the overall health and growth of marijuana plants. It is important to provide the roots with the right temperature, oxygen, and nutrients and to avoid planting the roots too deeply or allowing them to become overwatered.

To ensure the health of the root system, it is also essential to start with good seeds and strong genetics from a reputable shop like Hypno Seeds. By properly caring for the cannabis root system and starting with high-quality seeds, you can ensure that your plants are able to grow and thrive.

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