Not wanting to brush off your questions - I know they are sincerely meant. But do a Google search for fertilizers and the role of N-P-K as well as micronutrients. Every person probably has different thoughts about what is best for plants. But if you understand what nitrogen, phosphorus and potash, along with trace elements do in regards to plant growth, and the role pH plays in different types of plants, you'll be able to decide what you think is best.
Mike
Mike