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 INOCULO LABORATORIES

The Benefits of pH Testing

  Knowledge of your soil's pH can influence the health of your plants and their continuing growth.

 

 What is Soil pH ?

It is a measurement of the relative acidity or alkalinity of the soil, providing a guide to the overall chemical balance of the soil.

The pH scale is divided into 14 points:

· A pH of 7.0 in considered neutral
· A pH above 7.0 is considered alkaline
· A pH below 7.0 is considered acidic

 

 Why is pH so important ?

 · Soil pH is an important factor in plant growth because pH determines the
 

availability of soil nutrients to plants.

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 · Plants do not grow well outside the range of 4.5 - 8

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 · The availability of nutrients differ with the pH level
   - Calcium and magnesium are much more readily available in alkaline soils
   - Iron and manganese are much more readily available in acidic soils
   - Most nutrients available in relatively neutral soils (pH 6-7.5)

 

 · Plants preferring certain types of soil are often starved of important nutrients or
 

damaged by unwanted minerals.

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Acid loving plants growing in alkaline soils are often starved of
   

important elements. (eg: iron and manganese)

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Alkaline loving plants growing in acidic soil often cannot access
    sufficient calcium and magnesium or are severely damaged by amounts of dissolved aluminium or manganese.

 

 Potting Mixes & pH

 · Ideal pH range for potting mixes is between 5.3 and 6.5 although acid loving plants
 

prefer a range nearer 4.5 to 5.5

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 · Potting mix used for a considerable time should have its pH level checked frequently.
   
 · Salts remaining after using ammonium based fertilizers quickly accumulate leaving the
  mix too acidic for continued optimal growth.