Grass lives to seven or eight years, if it is a perennial type, on the other hand, annual grass gives one year long. Artificial turfs, however, would last from around five to 15 years, depending on their quality and cost. Individual blades last about 40 to 50 days maximum in the right conditions.grass, any of many low, green, nonwoody plants belonging to the grass family (Poaceae), the sedge family (Cyperaceae), and the rush family (Juncaceae). There are many grasslike members of other flowering plant families, but only the approximately 10,000 species in the family Poaceae are true grasses.Temperatures can go below freezing in temperate grasslands to above 90 degrees Fahrenheit. The height of vegetation on grasslands varies with the amount of rainfall. Some grasses might be under a foot tall, while others can grow as high as seven feet. Their roots can extend three to six feet deep into the soil.usually look like blades. Most of them also have hollow stems and many branching roots.