The only problem is that you don't speak the language. What fertilizers work, how much is needed, and when to use them. How to water.
Every neighborhood has links to highly skilled interpreters.
Your local Extension Office has soil testing kits and plenty of guidance as to how to help use them. Once you've done the simple test they help you send it off to the testing lab at your state's university. You not only help yourself save plenty of time and effort, while gaining a more productive property, but you help the environment, near and far by introducing what's beneficial and avoiding that which causes harm. What's on Top America's topsoil is eroding, whether by wind or flood. Many think it must be the color of chocolate cake.