This fertiliser feeds 400 square metres. Lawn Builder will provide deep & uniform greening while slowly feeding your lawn. Compared to many other granular lawn fertilisers, this product will not cause surge growth & extra mowing. A single application will mean that your lawn will be greener in just one week. The fertiliser contains readily available iron which the lawn can absorb immediately. The greening process will reach its peak within two weeks. Because the time release granules give a steady supply of nitrogen for up to eight weeks, your lawn will stay greener & thicker (but without surge growth) for months. This fertiliser should be applied between March & September, preferably when the soil is moist & long grass has been cut back. Grass should not be cut for four days before or after treatment.