All plant life needs food and water to have a healthy growth. In nature plants are nourished by diet of decaying plant and animal matter. To maintain a healthy garden and lawn fertilizers need to be added to replenish the soil. Firstly soil must be sufficiently moist to be able to take up and transport nutrients.
The best time to fertilize your garden, lawn, natives and flowering plants is spring. Before fertilizing you need to check the pH of the soil using a pH test kit. A pH of 7 is neutral, an extremely high or low pH indicates a problem with the soil and manifests itself as deficiencies in the plant. A high pH indicates the soil is alkaline and a low pH indicates it is acidic. If the soil is acidic you can use lime to correct it and if it is alkaline you can use sulphur. The optimum pH for most plants is between 5.5 - 7.0.
Different fertilizers are available for your garden. They come in two main groups: organic and synthetic. Organic fertilizers are derived from plant and animal products such as cow manure, sheep manure, compost and blood and bone. Synthetic fertilizers are usually sold in granular, powder or liquid form.
Most brands of complete lawn food will fertilize the lawn well. However try to avoid using fertilizers which have a high percentage of sulphate of ammonia. Excessive use of these products will have an impact on the soil and so the quality of your lawn. Although not specifically for lawns good results have been achieved from slow release fertilizers like Osmocote.