Lawns primarily are made up of grasses. Though there is certain grass like plants species viz sedges, low herbs and some wild flowers which can be used as an alternative to these grass species. Here we will be focusing on grasses only. There are several species of grasses which can be used for developing lawns. Some of these prefer warm and humid temperature while others require cool and dry weather. These are known as Lawn grasses and can be categorized in several ways. However, most commonly the lawn grasses are categorized as cool season and warm season grasses on the basis of the season of foliage.