I am preparing some areas in my yard for landscaping. After removing the grass, I dug a pilot hole to see what my soil situation is like, and it turns out I have about 2" of topsoil on sand. I don't mean "sandy soil", it is like a beach sand under there.
I plan on planting some shrubs that are in 3 gallon buckets.
Do I need to dig out the sand around where I am planting and replace with soil? If so, how far around (sides and below) should I dig out?