I am currently re-grading the beds in my front yard. Currently the rainwater runs towards the house. I've removed all of the landscape stone and the few dead bushes. My question is what should I buy to do the re-grading with? Topsoil? Just regular fill? Once I re-grade should I put a layer of topsil if I use regular fill? Should I mix some fertalizer into the soil so my bushes, plants and flowers will flourish when I'm done? Any other tips would be greatly appreciated.