Northeastern states all have cool-season grasses and plentiful rainfall. A number of states of put in strict regulations on the use of herbicides and even some fertilizer elements.
The northeast is a cool-season grass region. These grasses grow most actively in the spring and fall when soil temperatures are 65 degrees or lower. There are 4 major types of cool-season grasses: bluegrasses, fescues, and ryegrasses.
On average, areas of the country that are suitable for cool season grasses have cold winters with temperatures falling below freezing and warm summers, without extended hot periods.