grass won't grow in shady yard
I have a very shady backyard in which I can't get the grass to grow. I had new sod put in the yard 3 years ago, and now there are only patches of grass. I have a 3-year-old, 70-pound shepherd dog who loves to play in the yard, but she isn't the whole problem. I have a good sprinkler system which provides adequate irrigation. How can I get my grass to grow thick and healthy?