I picked up three Blueberry plants that I'm going to set out this weekend. Most of the directions I've read say to dig the hole quite a bit bigger than the root ball and to amend with an acidic soil/peat. On the other hand, a lot of stuff I've read over the past few years caution against this in general because it makes the plants act more like they are in a container. In other words, it deters the plant from putting out roots into the native soil. Our soil here is naturally acidic which the Blueberry likes, the topsoil is shallow though. Got about 6" of soil on top of clay. Any opinions?