totally agree with Tom. Call your County Extension office and they will guide you on what/how to collect the samples. If your pH is off it 'locks up' the nutrients in the soil from the plants. They may be bathed in fertilizer and still not have access to it. Putting unneeded fertilizer (unless it is organic matter) on soil before you know what you need is wasteful and bad for the environment. note: putting organic matter on your soil before it is composted and broken down, such as coffee grounds and even using Epson salts, can change your soil. Know what you need before you feed.
