pH Levels
steadyGROWpro leachate = 6.07*
steadyGROWpro-H+ leachate = 6.07*
pH value derived for steadyGROWpro leachate by soaking the media with water and appropriate nutrient solution. SteadyGROWpro's pH will always adjust properly based on the pH of the water and nutrient solution introduced.
What Is pH?
The pH scale measures how acidic or alkaline (basic) a substance is. The pH scale ranges from 0 to 14. A pH value of 7 is neutral. pH values under 7 are considered acidic while pH values of over 7 are considered alkaline. Pure water is neutral with a pH value of 7. Examples of acidic chemicals include vinegar or lemon juice. Substances such as laundry detergent and ammonia are considered alkaline or basic.
For plant growing purposes, pH directly affects nutrient availability. In highly acidic substances, certain nutrients such as aluminum and manganese can become more available and more toxic to the plant. In addition, important nutrients such as calcium, phosphorus and magnesium are less available to the plant if grown in low pH values (acidic). When pH values are alkaline or basic (over 7), micronutrients critical to plant growth are less available.
However, it is important to note, different plants thrive in different pH ranges. Check the recommended pH levels for the particular crop and crop variety you are growing. See the table below for a general overview of some popular crops.
Cucumbers
Optimal pH
5.0 - 6.0
Lettuce
Optimal pH
6.0 - 7.0
Peppers
Optimal pH
6.0 - 8.0
Tomatoes
Optimal pH
5.0 - 7.0
How To Adjust pH Level
The pH of the media or the nutrient solution can be adjusted by adding an acid or alkali. To lower the pH add acid and to increase the pH add alkali. Try to avoid using acids and alkalis that contain nutrients because the composition of the nutrients will be altered. Sodium Hydroxide is a commonly used alkali to raise the pH. Sulfuric Acid and Hydrochloric Acid are the two preferred acids to lower the pH.
Sources:
www.epa.gov
www.thegardenhelper.com
www.planetnatural.com
*Studies conducted by Purdue University Horticulture Department
