Ideal topsoil depth

QuestionsIdeal topsoil depth
Frank O'Connell Staff asked 15 years ago

In a proposed new garden there is no soil at all presently, just hardcore, stone etc, which will be excavated/moved to the required levels etc and then covered with fresh topsoil. I have access to as much good quality topsoil as I want with the additional option of manure etc as I need. Could you confirm the ideal topsoil depth for normal shrub, small tree, flower garden please?