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what is the best ph for growing marijuana

What is the best ph for growing marijuana

Testing pH with a Digital Meter

Testing pH is easy. Combination pH/EC meters are relatively inexpensive and require little training to use. They offer a permanent solution to disposable pH test strips and dye kits, which are cumbersome and must be subjectively interpreted by the color of the reactive test material.

Caption: Nutrient availability increases or decreases in response to pH. A pH level of 5.8 – 6.2 is appropriate for cannabis.

05 Mar Best Practices for Monitoring pH for Cannabis

The pH scale — which ranges from zero to 14.0 — provides insight into how chemical compounds will interact with one another based on their ionic state. It is good to remember, pH reflects the concentration of hydrogen ions in a solution. More intuitively however, pH from a practical sense can be understood in terms of acids (vinegar, ammoniacal nitrogen) and alkaline bases (baking soda, potassium bicarbonate).

For example, when pH is low, the solubility of some micronutrients like iron and manganese increases, making them more available to plants. This can cause toxicity. However, when pH increases, micronutrients, along with phosphorus, become less soluble and less available to plants.

Cannabis, like many plants, prefers slightly acidic soil conditions. It tolerates a wide pH range (5.0-7.0) without symptoms of bronzing or interveinal chlorosis (yellowing of top leaves), but pH levels outside of the optimal range of 5.8 – 6.2 will limit growth. To maintain optimal pH levels, cultivators should test pH levels every two days, and adjust the pH as needed.

We hope these tips have been a helpful reminder of how to leverage pH tests in your grow.

Regardless of the concentrations of your nutrient solution, unbalanced pH levels can create an antagonistic environment for nutrients and will make them unavailable to your plants. The figure above shows how nutrient availability relates to pH.

What is the best ph for growing marijuana

3.)Keep Testing! Learn if you need any more adjustments.

If not using any nutrients for this feeding, simply adjust the pH of the plain water.

How Do I Learn More About My Local Water?

But if you’re just thinking about buying standard potting soil from the local garden store, or using the soil you found around your house, you’re probably going to need liquid nutrients to supplement your cannabis grow for the best results and yields. Maintaining pH is one of the best tools you have to get the most from your nutrients.

The Hydroponics vs Soil debate continues to rage on, but no matter what your choice, the nutrients available today have exactly what’s needed by a cannabis plant to thrive at all stages of life, coasting perfectly to harvest time.