The Importance of Soil Ph

Soil pH

  • If your lawn is not performing very well or not responding to fertiliser this could be the soils pH.
  • pH is a measure of acidity and alkalinity.
  • Sir Walter lawns like to be in the 6 to 7.5 range for optimum performance.

Adjusting the pH is easier on loamy and sandy soils than on heavy clays:

  • If your soil is a sandy loam and you need to raise the soil pH by one unit add the equivalent of 150g of liming material per square metre.
  • Heavy clay soils will require at least 250g to raise the pH by one unit.
  • A super fine grade of lime works quickest and generally costs around $8 a bag.

For established lawn which may be lacking magnesium:

  • Mix 50/50 lime and dolomite as the liming material, to get the right balance of calcium and magnesium.
  • Dolomite is only available in one grade and costs around $8 a bag.
  • After applying lime or dolomite make sure you water them well so that it moves into the soil.

Testing the soil’s pH with one of the soil pH test kits:

  • All you have to do is follow the instructions and it even tells you how to make the changes.
  • You can get all the products you will need here at our online Lawnstore.

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