New Seed and Sod installation are the two main methods of installing a lawn. Sod is pre-grown grass that is installed on the surface of a property. Within a few weeks the roots from the sod penetrate to the surface soil below and the sod adhere's to the ground. Sod offers an immediate and flawless lush, green lawn. Seed is also an effective method for installing grass or a lawn. Seed is usually used for smaller jobs but can be used for larger ones too. Seed generally takes 7-10 days to germinate, a month to establish itself and about two months until its completely matured and established.