I know how you feel Danz, I lived outside of Derby for 26 years & the clay soil was horrible. I worked on my big garden area for all of the years I lived there adding organic material to it & it was really good by the time I sold the place & left it. Unfortunately when I decided to have a lagoon put in they told me I had to have the septic tank destroyed & they destroyed my garden space in the process. It made me sad to know I had worked all of those years on that & then it was destroyed in one day. Anyway, as far as other plants went only certain ones would grow in that clay in other places besides my garden. I did get some lilac bushes to grow there well. Here we have limestone everywhere living on this ridge like we do. If you dig just about anywhere you hit rocks.