I have a problem with my vegetable garden which I will attempt to explain fully. I live in suburban Pittsburgh. I moved into my place 20 years ago when the development was just being built. This is one of those places where they come in and strip every living thing off the face of the Earth before beginning building. In addition where my garden is located the soil has huge submerged rocks throughout. So when I started my garden , shortly after moving here, I constructed a raised bed out of 2 x 12 lumber and filled that with good quality soil. My garden is quite small being 10ft X 12ft.
The garden consists mostly of Tomatoes, Peppers. Occasionally I plant a Zucchini or Bush Cucumber. My problems are as follows. Blossom end rot on the Tomatoes,low yield on Tomatoes and Peppers and small fruit on both. I am getting Beefstake and Big Boy Tomatoes that are the size of golf balls. I have added aged Horse manure,Miracle Grow,Epson Salts,Lime,Etc. At one point I had the Nitrogen high enough that the Tomatoes plants were dark green and very full with foliage. I have researched blossom end rot and definitely don't have a Nitrogen deficiency and practice regular watering. I have had my soil tested two or three times and came back pretty normal every time, not lacking steeply in any of the components.
The first few years I planted the Garden everything was fine. After a couple years these problems started. At one point I covered the entire thing with black plastic for an entire year. The following season I had mediocre results. The season after that I was right back to my troubles.
I realize my garden is quite small so it really doesn't allow for very thorough crop rotation. I have tried to plant at opposite ends but the size of the garden limits this action. I would really like to continue my vegetable garden as I look forward to it each year but with the yield I am getting at present it is either fix it or give it up. Any suggestions on how to rectify my situation would be appreciated.