Your first step should be to get an analysis of your soil. A test kit can be obtained from the Texas A&M AgriLife Extension office. Instructions for taking the sample are included with the kit. In the meantime, you can improve any soil by adding organic matter such as compost, peat moss, rotted manure or similar materials. This will help lower the pH and improve soil texture. Once the soil test results are obtained, follow the recommendations for adding any needed fertilizers.