I just bought an old house with an area of about 30X40 feet in the backyard that is covered with asphalt.
I had the asphalt removed and underneath there is about 4 inches of construction aggregate and other stones.
Is it possible to plant over that? Should I take away everything to the bare ground.
The guys that pulled off the blacktop said I only need a couple of inches of topsoil.
I can hardly believe that's true!

Thanks for the advice.