If your garden looks pale and has dead patches or if the grass blades are yellowing and if you don’t see any fungus, insects or grubs then you should think of adding lime.
The best soil for your lawn is with neutral pH. pH is the quantity of hydrogen ions present. This usually determines the nutrients available to plants which tends to become acidic over time. The best way is to test your soil by using the pH testing kit from your local nursery.
If the above test result shows that your soil is acidic, then it’s time for lime. This counteracts acidity and provides nutrients. Lime also reduces the solubility of potentially toxic elements such as aluminium and manganese, promotes the availability of plant nutrients including phosphorus, and improves soil structure
The best time to apply is before the lawn goes down, as it is absorbed very slowly. For an existing lawn that’s ailing, try to add lime in late autumn, winter, or early spring. If you live in an area with cold winters, apply before the frosts; the freezing and thawing assist the lime’s penetration into the soil. Avoid adding lime when the ground is very wet, as this makes an even distribution difficult.