I would like to get my Lawn Thicker and Greener, I live in Ohio and am thinking about putting a Bluegrass seed on my lawn. What would be the best grass seed to get? How would you put it on drilling it in or is there another way to do it? When would be the best time to do it? My backyard gets about 95% Direct Sunlight? My soil is clay. My front yard is very good and needs to be thicker and greener, comparing the two the front yard is 10 times thicker than my backyard which needs the most care to get it thicker. I mow at 3 inches in height.