Lawns are much simpler than many fertiliser companies would have you believe. Using some common household items, you can grow an incredibly green and healthy lawn.
Put 1 teaspoon of lemon scented dish soap (such as palm olive) into a hose end sprayer. Fill the sprayer with water & connect it to your garden hose. Spray your lawn over with this solution about twice a month. The soap deters bugs & insects from destroying your lawn, cleans the grass so better photosynthesis can take place, and softens the soil.