Having a perfect lawn depends on the type of grass you choose. The sod you select should be composed of plants adapted to both the site and the intended purpose. Plant breeders have put a lot of effort into developing new and hardier varieties that thrive in different climates, sun and soil conditions. Some new grasses even resist disease and insect pests. But the main things you should focus on selecting the sod are your local climate, as well as the amount of sunlight your lawn gets.
For example, the Kentucky Bluegrass that is a cool season grass, holds up well to cold winters, but it's not a preferred grass for hot weather, like St. Augustine or Bermuda. In the case of cool season grasses the most abundant growth occurs in the spring and fall, while during the summer, these grasses may turn brown. On the other hand, in the case of hot season grasses, it’s during the summer that the most vigorous growth happens.
Another factor you should pay extra attention when choosing the type of grass is the amount of sun your lawn is going to enjoy. Most grass species need direct sunlight several hours a day to develop nicely, but you can plant shade-tolerant grasses such as red fescue or tall fescue in the case that your yard has lots of trees. If your lawn is completely covered in shade, consider another sort of ground cover.
Choosing the correct type of sod also depends on the amount of water in your area – if it is a drought-prone region or, on the contrary, a wet one -, but take into consideration also how you plan to maintain your lawn and your lifestyle. You can choose between many types of grasses that allow infrequent watering and mowing and there are also some resistant to heavy traffic, in case you have children or dogs.
Another thing worth to remember is that is actually better to buy a blend of more types of grasses so that you can enjoy a beautiful lawn all year round.
In the end, when you enter a shop be careful at these things: sod has to be machine cut at a uniform depth of ½-2 inches, it shouldn’t have been cut in very wet or dry weather, the sections have to be of a standard size and strong enough to support their weight when lifted.