I'm remodelng my yard and am trying to create a suitable bed for planting a couple of dwarf fruit trees and some flowers. I live in Socal where we have clay soil and over 50% or more of the soil is large rocks and boulders. My plan is to excavate to around 2' deep and remove the soil and rocks and replace with amended topsoil.
Should I be adding topsoil to such a depth. I figured that the plants would be garanteed good soil as it grows by digging to such a depth. Is this the correct thing to do or are there are downsides to adding so much amended topsoil.