We dumped a bunch of new soil into our garden in the off season. I hope it helps this year. Last year a lot of our plants died early on because they got some kind of disease. Has anyone done this before? Did it help?
Every year before planting anything we always use the rototiller to turn and loosen the soil and add some new dirt to the mix. It works out well because then it breaks up all the mulch we put around the plants during the growing season. That is a good time to add in whatever you use to fertilize.
Whether it helps or not depends a lot on how bad the soil is where you are. A couple of inches of topsoil won't help much in many cases, because the roots are down below that, still in the bad soil. The best thing to do would be to dig up and remove a foot or two of the old soil and replace it all with a mix of new soil and some manure, or other fertilizer.
First, i would have your soil tested. check the PH. just replacing the soil may not work .. garden soil needs nutrients. find
a horse farm that you can get manure. horse poop will build up the humus. a shart load of cow manure will be the topper.
till the bejeezaws out of it, then watch the results. just my $.02 ...
I always dig my hole for the plants, set them in it and then fill the hole with a little Miracle Gro organic. I have never had any problems with my plants getting sick. They actually grow like crazy. Maybe you could try doing something like that?