Originally Posted by SuperGreg

Sod can be any type of grass, it is just grown and harvested grass that you buy in pre-cut strips and lay down on prepared soil for an instant lawn. In Arizona, bermuda grass is the only type of grass that can handle 110 degree temps plus. When winter arrives and temps go down, the bermuda goes dormant. We then scalp the bermuda down and plant winter rye grass. Then when temps get over say 90 degrees, all the winter rye dies, and the bermuda grass comes back to life. I have attached a pic of the winter rye grass below, it's a much brighter green. Bermuda grass is a crawling grass and fills in the bare spots/holes rather quickly. The winter rye grass can be a pain, because it grows straight up and doesn't crawl, and you have to put a ton of seed down to overcome what is eaten from the birds.