Influence of soil pH on the growth and development of hemp

Contents

• A Little Theory
• The Effect of pH on Cannabis
• How to Measure pH Level
• Digital Meters
• Reagents and Indicator Strips
• pH Adjustment
• Using pH UP and pH DOWN
• pH in Open Soil

When it comes to growing cannabis, the term "pH" is often encountered. It is an extremely important factor for healthy plant growth. In this article, we will explain in detail what these two letters mean and why they are so important for growing marijuana. You will also get practical tips on how to control this parameter.

A Little Theory

pH is a Latin expression pondus Hydrogenii, which translates to "weight of hydrogen." This indicator determines the level of activity of positive hydrogen ions in a given environment. Simply put, it is the acid-alkaline balance, which is measured from 1 to 14. The neutral pH value is 7.0; below is an acidic environment, above is alkaline. However, the pH value does not indicate the total amount of dissolved impurities.

The Effect of pH on Cannabis

The pH level of the environment has a significant impact on the absorption of nutrients by plants. Too high or low values can lead to deficiencies of various elements. Even if the soil is rich in nutrients, cannabis cannot absorb them with an inappropriate pH level.

Cannabis absorbs nutrients from chemical compounds, not in pure form. Roots can absorb necessary substances only within a certain acidity range. Most fertilizers are designed for use within a specific pH range. Strong deviations from the optimal level can negatively affect the absorption of mineral and organic compounds.

The optimal pH range for cannabis varies from 5.5 to 6.5. However, it is important for the pH level to fluctuate within this range, as different nutrients are absorbed at different acidity levels. This is also true for the hydroponic method of growing.

How to Measure pH Level

Digital Meters

Digital devices are the most accurate for measuring pH levels, with an accuracy of up to 0.01. The range of such devices is wide, and you can find quality devices at an affordable price. There are special meters for liquids and for soil (meters for soil are less accurate, so it is better to take samples of water from drainage for measurements). Some testers can also measure humidity and temperature.

Reagents and Indicator Strips

Reagents and indicator strips are used together with special charts. The color of the reagent determines the level of acidity. This method is less accurate but budget-friendly. For hydroponic setups, this method is not suitable, but for soil, it is quite acceptable.

pH Adjustment

The main factor affecting soil acidity is the pH of the irrigation solution, even if it is just water. Minor deviations can be corrected by watering with distilled water. For adjusting the acidity of the nutrient solution or with a strong imbalance in soil pH, pH UP and pH DOWN preparations are used.

Using pH Up and pH Down

1. Add fertilizers and additives to the solution.
2. Mix the solution and gently shake it.
3. Measure the pH level in the solution.
4. Adjust the pH to the required level (pH Up to increase acidity, pH Down to decrease it). The quantity is specified in the instructions.

When growing in pots or grow bags, measure the pH of the water that drains into the tray. The values should be within the permissible range. If the pH of the water is below the required level, use a solution with the maximum allowable pH for the next watering, if it is above, use the minimum allowable pH.

pH in Open Soil

The methods differ for open soil. Increasing pH can be done using garden lime or dolomite flour. To lower pH, aluminum sulfate or sulfur is used. Soil treatment is carried out 2-3 months before planting cannabis.

Now you know the basic aspects of pH control for growing cannabis.

Attention! Errors Seeds does not encourage or support cannabis cultivation. Growing is prohibited by Ukrainian law. This article is purely for scientific and educational purposes.