I am just about to start my landscape service. Just about to get insurance, and apply for my contractors license. I've been studying lawns for the past year, buying equipment gradually, and learning as much as I can about the business. But here's my questions... In my experiments in my own lawn I have had some bad experience getting grass growing. I know the soil is clay, and nothing but clay. The grass grew in the spring for about 2 weeks and then slowly died off. I was watering it plenty, but never got it fully established. I am just wondering what the best way to deal with clay is? I have heard gypsum will help break it up, is this true? Any advice will be thankful!