After winter, in many gardens the root structure of the grass plants will have been compromised by poor sunlight and wet soil conditions. This is an open invitation for an infestation of lawn weeds which can be difficult to eradicate.
The first thing I do in spring is gently thatch my lawn using a plastic or bamboo leaf rake - I find the metal ones are bit hard on the grass roots.
Mow the lawn to about an inch and a half, being careful not to mow so low that the white shoots are exposed too much.
Next rake the lawn with the leaf rake to draw up a fibrous tangle called thatch. Gently rake in a 50-50 blend of fresh lawn mix and sand to about a centimetre or so thick. I also dress with compost as a feed. There are plenty of good quality granulated lawn fertilisers available at Bunnings but I prefer to concentrate first on soil rather than plant health.
For a liquid feed I use urine mixed with water at about a five to one ratio, and applied with a sprayer. It's quite safe and is extremely high in nitrogen. Take this opportunity to add some seed, remembering that different seed types will do better in different situations. I've been slowly adding a shade loving seed blend with good results.
Lastly, don't forget to water.
Your lawn will require mowing little and often during summer but it's watering over the dryer months that will give you that shiny thick carpet we all want this summer.